Monterey Pine (Pinus radiata) is a coniferous evergreen tree with upward-pointing branches and a rounded top. It can to 50 to 100 ft in height in the wild but up to 200 ft in cultivation in optimum conditions. The leaves ('needles') are bright green, in clusters of three (two in var. binata), slender, up to 3 inches long and having a blunt tip.

The cones are 3 to 6.5 inches long, brown, ovoid (egg-shaped), and usually set asymmetrically on a branch, attached at an oblique angle. The bark is fissured and dark grey to brown.

This pine is adapted to cope with stand-killing fire disturbance. Its cones are serotinous, that is, they remain closed until opened by the heat of a forest fire. The abundant seeds are then discharged to regenerate on the burned forest floor. Cones may also burst open in hot weather.

It is native to three very limited areas located in Santa Cruz, Monterey, and San Luis Obispo Counties in California, and also to Guadalupe and Cedros Islands in Mexico. Although Monterey Pine is extensively cultivated around the world for lumber, the version of the tree used in the lumber industry is vastly different from the native tree. In its natural state, Monterey Pine is a rare and endangered tree; it is twisted, knotty and full of sap/resin and not suitable for lumber.

In its native range, Monterey Pine is associated with a characteristic flora and fauna. It is the co-dominant canopy tree, together with Cupressus macrocarpa which naturally occurs only in coastal Monterey County.

One of the pine forests in Monterey was the discovery site for Hickman's potentilla (Potentilla hickmanii), an endangered species. Yadon's Rein-orchid (Piperia yadonii), a rare species of orchid, is endemic to the same pine forest adjacent to Pebble Beach. In its native range, Monterey Pine is a principal host for the dwarf mistletoe Arceuthobium littorum. A remnant Monterey Pine stand in Pacific Grove is a prime wintering habitat of the Monarch butterfly.

Grow this plant only along the coast well within the coastal fog bank. In inland areas, it will grow fast if given water but typically dies after around five years. One of the few native plants that the California Invasive Plant Council has determined is invasive in regions outside its natural range. it has invaded coastal scrub, prairie, and chaparral.

Foothill Pine (Pinus sabiniana), also known as gray or ghost pine, is a slow-growing and moderately long-lived tree native to California. It grows at elevations up to 4,500 feet and has distinct, long, drooping, silvery-green foliage. The yellow flowers bloom in early spring, and the tree bears sweet edible seeds. This pine is quite resilient, thriving in areas with poor soils and dry conditions.

Foothill Pine grows in an upright form to a height of up to 80 feet, but with regular irrigation, it can reach 40-60 feet in landscaping applications. Its feathery, lacey canopy allows plenty of light to filter through, making it an excellent choice for planting understory plants beneath it without much interference. This tree is perfect for dry, challenging areas and provides a soft, dappled shade.

The Torrey pine (Pinus torreyana) is the rarest pine in the U.S., found only along San Diego's coast and on two Channel Islands. This endangered tree grows 26–56 feet tall with long, gray-green needles in clusters of five and large, edible pine nuts in stout cones. It thrives in dry, sandy soils and coastal fog, often developing twisted, sculptural forms from wind exposure.

The pine nuts are a valuable food source for birds, small mammals, and other wildlife. Its dense canopy also provides nesting and shelter for birds.

Historically limited to about 100 trees in the early 20th century, conservation efforts have helped the wild population recover to around 3,000. Torrey pines are now planted in drought-tolerant landscapes and protected by local ordinances near their native range. In gardens with richer soil and more water, they can grow over 100 feet tall.

Plantago erecta is a small, unassuming annual herb with needle-like leaves and translucent flowers clustered on a stalk. It grows in sandy, clay, or serpentine soils, on grassy slopes and flats or open woodland, from California to Oregon. It is known variously as California Plantain, Foothill Plantain, Dot-seed Plantain, English Plantain, and Dwarf Plantain. P. erecta is a primary host plant for the Bay Checkerspot Butterfly.

Goose Tongue (Plantago maritima var. juncoides) is a native perennial herb that grows in central and northern California. It tends to grow in wet places, at elevations from - feet.

Plantago subnuda is a species of plantain known by the common name tall coastal plantain. It is native to western North America from the west coast of the United States to west-central Mexico, where it grows in wet and moist habitat types, often in coastal areas, such as marshland. It is a perennial herb producing few oval leaves around a thick caudex. The broad smooth-edged or slightly toothed leaves may be up to 40 centimeters long. The stemlike flower clusters grow erect to a maximum height near half a meter. Atop the peduncle of the flower cluster is a dense cylindrical spike of many tiny flowers. Each flower has a corolla of ephemeral petals about 3 millimeters long.

The Western Sycamore (Platanus racemosa), a species of plane tree native to California, is a tall, distinctive tree that stands out in any landscape. This tree is known for its bark, which is mottled in shades of pale tan, gray, and white. The bark peels as it ages. It has twisting branches and large leaves which turn orange-yellow in the fall. It produces seed balls after blooming. It's an important host plant for the Western Tiger Swallowtail butterfly.

Naturally found in moist areas near rivers and streams, this tree requires a significant amount of water to thrive. When not planted near a water source, it needs regular irrigation. The Western Sycamore tolerates different soil types and does best in full sun. It can grow up to 100 feet tall and 50 feet wide, so be sure to give new trees a large planting area.

Pluchea odorata is a species of flowering plant in the aster family, Asteraceae, that is native to the United States, Mexico, Central America, the Caribbean, and northern South America. Common names include Sweetscent, Salt Marsh Fleabane, and Shrubby Camphorweed. It inhabits wetlands and other coastal habitats and moist inland areas, often in saline substrates. It is an introduced species and a noxious weed in Hawaii. It is an annual or perennial herb growing erect to a maximum height over one meter. It is hairy, coated in rough trichomes (hairs), and strongly aromatic. The toothed oval leaves are up to 12 centimeter (4.7 inches) long and alternately arranged on the stiff stems. The flower cluster is a large cluster of many flower heads. Each head is less than 1 centimeter (0.39 inches) long and filled with bright pinkish-purple or magenta flowers. The fruit is a tiny achene tipped with a bristly pappus.

Poa secunda (variously known by the common names of Sandberg bluegrass, alkali bluegrass, big bluegrass, Canby's bluegrass, Nevada bluegrass, one-sided bluegrass, Pacific bluegrass, pine blugrass, slender bluegrass, wild bluegrass, and curly bluegrass. ) is a widespread species of grass native to North and South America. It is highly resistant to drought conditions, and provides excellent fodder; and has also been used in controlling soil erosion, and as revegetator, often after forest fires. Cultivars include 'Canbar', 'Service', 'Sherman', and 'Supernova'. Historically, indigenous Americans, such as the Gosiute of Utah, have used P. secunda for food. It was originally described botanically in 1830 by Jan Svatopluk Presl, from a holotype collected from Chile by Thaddäus Haenke in 1790.

Fremont cottonwood (Populus fremontii) is a fast-growing native shade tree found in alluvial bottomlands and along streamsides at elevations from 0 to 6,500 feet. It thrives in moist soils with plenty of sunlight and is known for its striking, heart-shaped leaves that shimmer in the wind.

This tree is tough and easy to grow, reaching up to 100 feet tall and 35 feet wide when well-watered. It can grow 10–20 feet in a single year, making it ideal for large spaces but unsuitable for small gardens. Due to its invasive roots, it should not be planted near lawns or structures.

Often, only male trees are sold to avoid the "cotton" produced by female trees. Fremont cottonwood is ecologically important, providing habitat and food for birds and butterflies.

Grows best in loamy, medium draining soil. Selection (male) for the garden.

Populus tremuloides is a deciduous tree native to cooler areas of North America. The species is referred to as Quaking Aspen, Trembling Aspen, and Quakies, names deriving from its leaves which flutter in even a slight breeze. The tree can become tall, up to 25 meters, but is more often half that height, with smooth pale bark scarred with black. The glossy green leaves, dull beneath, become golden to yellow, rarely red, in Autumn. The species rarely flowers, often propagating through its roots to form large clonal groves. The quaking or trembling of the leaves is due to its flattened petioles. The specific epithet, tremuloides, is given for this trembling characteristic. Other species of Populus have petioles flattened partially along their length, while the Quaking Aspen's are flattened from side to side along the entire length of the petiole. This quaking of the leaves produces a soft sound that many consider a hallmark of the Quaking Aspen. It can be found in many parts of North America. In California it is most common in the Sierras and other high elevation mountains. Nurseries usually sell only male plants because female plants can produce large amounts of cottony seeds. Unless you have acreage, use caution in planting this tree because it will send out suckers long distances to quickly form a dense grove that will fill in any moist area. There are usually few understory plants in Quaking Aspen groves.

Black Cottonwood (Populus balsamifera ssp. trichocarpa) is a native tree that grows in northern, southern and central California. It is fast growing and moderately long-lived. It grows in an upright form to a height of 100 feet, with active growth during the spring and summer. Flowers are yellow and bloom in the mid spring. Leaves are medium green and deciduous. It tends to grow in alluvial bottomplands and streamsides, at elevations from 0-9000 feet. Tough and easy to grow as long as it is in sun, near a water sources and has very good drainage. Black Cottonwood is a great choice to help build a natural irrigation system - its long shallow roots will reach out to the water source and pull underground water molecules through your garden. It needs moist soil until mature, and then becomes moderately drought tolerant.

Argentina anserina, also known as common silverweed, silverweed cinquefoil or just "silverweed", is a flowering perennial plant in the rose family Rosaceae. It is native throughout the temperate Northern Hemisphere, often on river shores and in grassy habitats such as meadows and road-sides. The plant was formerly classified in the genus Potentilla but was reclassified into the resurrected genus Argentina by research in the 1990s. It is a species aggregate which has frequently been divided into multiple species. Silverweed is most often found in sandy or gravelly soils, where it may spread rapidly by its prolific rooting stolons. It typically occurs in inland habitats, unlike A. egedii, which is a salt-tolerant coastal salt marsh plant.

Potentilla gracilis, known as Slender Cinquefoil, or Graceful Cinquefoil is a species of cinquefoil. Named varieties are:

Prosopis pubescens, commonly known as Screwbean Mesquite or Tornillo, is a species of flowering shrub or small tree in the pea family, Fabaceae, that is native to the southwestern United States (Texas, Arizona, New Mexico, California, southern Nevada and Utah) and northern Mexico (Baja California, Chihuahua, Coahuila, Sonora). In California it is found primarily in desert areas from Inyo County southward. It has light brown bark, usually short, straight spines (1-3 centimeter/0.39-1.2 inches), twice-compound leaves, and numerous, small, yellowish flowers appearing in elongate spikes. It is found along streams and valleys in deserts, particularly in damp or saline soil, and grows to about 7 meter (23 feet). It is distinguished from the very similar Honey Mesquite (Prosopis glandulosa) by its tightly twisted seedpods (legumes) which very much resemble turned screws. This morphology may have been an evolutionary defense against seed predators such as bean weevils (Bruchinae). Like Honey Mesquite, these seed pods are valued by wildlife and were eaten by native people.

Oregon cherry or Bitter cherry (Prunus emarginata) is a species of Prunus native to western North America, from British Columbia south to California, and east to western Wyoming and Arizona. It is often found in recently disturbed areas, open woods, on nutrient-rich soil. It is a deciduous shrub or small tree growing to 1-15 meter tall with a slender oval trunk with smooth gray to reddish-brown bark with horizontal lenticels. The leaves are 2-8 centimeter long, thin, oval-shaped, and yellowish-green with unevenly-sized teeth on either side. The flowers are small, 10-15 millimeter diameter, with five white petals and numerous hairlike stamens; they are almond-scented, and produced in clusters in spring, and are pollinated by insects. The fruit is a juicy red or purple cherry 7-14 millimeter diameter, which, as the plant's English name suggests, are bitter. As well as reproducing by seed, it also sends out underground stems which then sprout above the surface to create a thicket.

Hollyleaf cherry or Evergreen cherry is a species in the Rosaceae (Rose) family that is native to coastal California and northern Baja California. It is an evergreen shrub or small tree up to 15 meters tall, with dense, sclerophyllous foliage. The leaves are 1.6-12 centimeter long with a 4-25 millimeter petiole and spiny margins, somewhat resembling those of the holly, hence its English name; they are dark green when mature and generally shiny on top, and have a smell resembling almonds when crushed. The flowers are small (1-5 millimeters), white, produced on racemes in the spring. The fruit is a cherry 12-25 millimeter diameter, edible and sweet, but contains little flesh surrounding the smooth seed. Great for birds.

There are two recognized subspecies; ssp. lyonii (commonly known as Catalina Island Cherry) is native to the Channel Islands. It was formerly considered a separte species, and it is very similar in appearance and genetics to other P. ilicifolia. They hybridize readily, and many plants sold in nurseries may be unintentional hybrids.

Hollyleaf Cherry (Prunus ilicifolia ssp. ilicifolia) is a native evergreen tree or shrub in the Rose family that grows in the coastal and inland valleys strip of northern, central, and southern California. It tends to grow on slopes or in valleys, at elevations from 0-5200 feet. It grows in chaparral, coastal sage scrub, and southern oak woodland habitats and can vary greatly in size depending on conditions. In dry, rocky or shallow soils it will be bush-like from 5 to 15 ft. In richer soils with more moisture it will attain large shrub or small tree size, up to 30-40 ft.
The leaves are holly-like and evergreen. The flowers are small and white; the fruit is a one inch red to dark purple drupe that is popular with wildlife. The closely related subspecies Prunus ilicifolia ssp. lyonii (Catalina Cherry) is endemic to the Channel Islands, but in appearance and behavior the two can be difficult to distinguish as they hybridize readily.

Catalina cherry (Prunus ilicifolia ssp. lyonii) is a lovely evergreen shrub with shiny soft leaves and dark cherry colored fruit.  In late spring, striking white flowers appear. Older trees may resemble coast live oak.

As a native plant, it grows in chaparral woodland, primarily in the Channel Islands region.

The edible fruits are favored by birds and other wildlife. 

Catalina cherry can be planted as a hedge because its dense vegetation creates a good screen. It is fairly easy to grow and will tolerate garden conditions, with summer watering once or twice a month. It is fast growing once established and moderately long-lived.  Fallen fruits may stain concrete paving, if any is nearby. 

Klamath plum, also called Oregon plum, or Sierra plum (Prunus subcordata) is a member of the genus Prunus (plum, cherry, and other stone fruit), native to the west coast of the United States in California and southern Oregon. It grows in forests, most often at low elevation near the coast, but it is also in the Sierra Nevada and Cascades; it grows at altitudes of 100-1,900 meter. It is an erect deciduous shrub or small tree growing to 8 meter in height. It sprouts from its roots and can form dense, spiny thickets. The bark is gray with horizontal brown lenticels, similar in appearance to that of the cherry tree. The leaves are 2.5-5 centimeter long with a 4-15 millimeter petiole, dark green, turning red before falling, and are faintly serrated. The flowers are pink or white, appearing in the spring in clusters of one to seven together. The fruit is a small plum-like drupe, variable in appearance, 15-25 millimeter in length, and may be red or yellow; they are mature in late summer. The plums are small and tart but edible.

Choke Cherry (Prunus virginiana) is a species in the Rosaceae (Rose) family, in the Bird Cherry (Padus) subgenus. It is native to North America where it is found almost throughout the continent except for the deep south and the far north. The plant is widespread in California, particularly in the mountains. It is a suckering shrub or small tree growing to 5 meter tall. The leaves are oval, 3-10 centimeter long, with a coarsely serrated margin. It is deciduous, and the leaves provide some fall color. The flowers are produced in racemes of 15-30 inches late spring (well after leaf emergence). The fruits are about 1 centimeter diameter, range in color from bright red to black. Although they are said to be edible, they contain small amounts of cyanide, especially when unripe. The very ripe berries are dark in color, less astringent, and contain less cyanide. Despite the potential toxicity, the fruits were valued by many Native people.

Western Chokecherry (Prunus virginiana var. demissa) is a native tree or shrub that grows in northern, southern and central California. It is fast growing and short-lived. It grows in an upright form to a height of 20 feet, with active growth during the spring and summer. Flowers are white and striking, and bloom in the spring. Leaves are medium green and deciduous. It tends to grow in rocky slopes, at elevations from 0-8200 feet.

Fragrant Everlasting (Gnaphalium canescens ssp. beneolens) is a native perennial herb that grows in northern, southern and central California. It tends to grow at elevations from 0-8700 feet.

California Cudweed (Pseudognaphalium californicum) is a species of flowering plant in the Asteraceae (Sunflower) family. It is native to the west coast of North America from Washington to Baja California, where it is a member of the flora of many habitats, including chaparral. In California it is most often found near the coast from Sonoma County southward and in the Sierra foothills.

This is an annual or biennial herb with branching stems. Its green herbage is hairy, sticky and scented. The flower head is a wide cluster of flowers, each enveloped in ringed rows of bright white. The flowers are very long lasting when dried and are used in flower arrangements.

Classification is disputed between the genera Pseudognaphalium and Gnaphalium, but it is presently classified as Pseudognaphlium. Also, some sources refer to this plant as Pearly Everlasting, but that's actually the common name of a different species (Anaphlis margaritacea). California Cudweed would work best in an informal garden or wildscape. It re-seeds prolifically, so be prepared to pull seedlings from areas where it is not wanted.

Douglas Fir or Douglas-fir, Pseudotsuga menziesii, is an evergreen conifer native to the coastal regions of western North America, from central California north through Oregon and Washington to British Columbia, Canada. In California, it is found in the Klamath Mountains and the Cascade Range, the California Coast Ranges as far south as the Santa Lucia Mountains in Monterey County, and the Sierra Nevada as far south as the Huntington Lake region in Fresno County.

In California the Douglas Fir and its variety named Coast Douglas Fir (Pseudotsuga menziesii var. menziesii) occur from near sea level along the coast to 5,900 feet (1800 m) in the Sierra Nevada. Eastward they are replaced by its variety named Rocky Mountain Douglas Fir (Pseudotsuga menziesii var. glauca). Its variety named Mexican Douglas Fir (Pseudotsuga menziesii var. lindleyana) is endemic to central and northern montane Mexico.

Douglas Firs commonly live more than 500 years and occasionally more than 1,000 years. The species name, menziesii, honors Archibald Menzies, the first European botanist to document it (1791). The common name honors botanist David Douglas, who introduced it into cultivation (1827). Douglas Firs are commercially important for lumber.

Due to their robust mature size Douglas Fir trees are not frequently planted in small to mid-size residential gardens. Since they can get exceptionally large they need to be provided with plenty of space to grow above and below ground.
Douglas Firs are the second-tallest conifer species in the world after Coast Redwoods (Sequoia sempervirens). Trees 200-250 feet (60-75 meters) in height and trunks 5-6.6 feet (1.5-2 m) in diameter are common in old growth forests. Maximum heights of 330-390 feet (100-120 m) and trunk diameters of 15-20 feet (4.5-6 m) were historically documented. The "Doerner Fir" in Oregon is the tallest known currently living Douglas Fir at 326 ft. (99.4 m) tall; and the "Queets Fir" in Olympic National Park has the widest known currently living trunk at 16 ft. (4.85 m) in diameter.

Purshia tridentata is a nitrogen fixing shrub in the Rose family, native to mountainous areas of western North America ranging from southeastern British Columbia in the north, east to Montana and south to California and New Mexico. It grows on arid mountainsides; in California it occurs between 700-3,400 meter above sea level (Jepson) in the southern mountains and into the eastern Sierras, but lower further north, at 320-1,065 meter from the Cascades up to British Columbia (Plants of British Columbia). Common names include Antelope Brush, Antelope Bitterbrush, Buckbrush, Quinine Brush, and less commonly Deerbrush, Blackbrush, and Greasewood. Some of these names are shared with other closely related species. There are two recognized Varieties: Var. tridentata is generally found from Tulare County northward. Var. glandulosa is generally found from Mono County southward. This is an attractive plant for dry, mountainous areas and very important for wildlife. Although it is native to arid places, it can tolerate garden conditions as long as drainage is good.

The Coast Live Oak (Quercus agrifolia) is an iconic, majestic tree that serves as a cornerstone for wildlife and the surrounding ecosystem. It is easily-recognized by its gnarled branches and grand canopy. The Coast Live Oak flowers each spring and its acorns attract a wide variety of birds and butterflies - over 270 species rely on these trees for habitat and food.

With its rich green foliage and unique branching pattern, the Coast Live Oak is a favored choice for both residential and commercial landscapes. These resilient trees can live for centuries, often surpassing 250 years, and can grow impressively tall, reaching mature heights ranging from 30 to 80 feet.

It is one of the only California native oaks that thrives in coastal environments, it enjoys fog and mild winters. In the first year after planting, water once a week. Then, reduce it to once a month until it reaches about 10 feet tall. After that, avoid watering directly during summer.

Coast Live Oaks like to have their roots shaded. When they're young, surround them with mulch, rocks, or smaller native plants. Some California natives, such as Toyon and Manzanitas, do well as "understory" plants under the Coast Live Oak. Fallen oak leaves provide natural mulch for the tree. Don't fertilize oaks. They'll amend the soil over time with their own leaves and build the natural mycorrhizal fungus in the soil they need to thrive. Gradually, they become islands of natural fertility that improve the health of the nearby plants.

Quercus agrifolia var. agrifolia is one of two recognized varieties of this popular tree. The other variety is var. oxyadenia. Both are known as Coast Live Oak (see description of Quercus agrifolia for more details regarding the species). Differences between the two varieties and the primary species are very subtle. Var. agrifolia is found along the coast from Sonoma County southward. Gardening recommendations are the same as for Quercus agrifolia.

Scrub Oak plays a vital role in supporting biodiversity by attracting birds and a diverse range of butterflies. Its ability to thrive in various conditions and benefits to local wildlife make it a valuable addition to gardens.

It is a medium-to-small oak. Its green leaves are leathery on the surface and somewhat hairy on the underside. Scrub Oak is a versatile plant that thrives in full sun to part shade. In cooler regions, it remains compact, while in warmer areas, it spreads out and grows several meters high.

Scrub Oak benefits from a thick layer of oak leaves as mulch with a few large rocks. Refrain from summer watering to mimic its natural drought-tolerant adaptation.

Canyon live oak is a species of evergreen oak that is found in the southwestern part of North America, notably in the California Coast Ranges. It is the most wide-spread oak in the state. Its ultimate size and shade are determined by its location within the state. This tree is often found near creeks and drainage swales growing in moist cool microhabitats. Its leaves are a glossy dark green on the upper surface with prominent spines; a further rapid identification arises from the leaves of Canyon live oak being geometrically flat. They are often sympatric with Quercus agrifolia and several other oak species. Fossil data supports a much wider distribution throughout the western United States during the early Holocene period. Native Americans used the acorns of this species as a food staple, after leaching of the tannins; moreover, its roasted seed is a coffee substitute. After forest fires, Canyon live oak regenerates vigorously by basal sprouting, and the clonal diversity of this species has been shown to be high. Alternate common names for this taxon are Canyon oak and "Golden-Cup Oak".

Quercus cornelius-mulleri is a North American species of oak known by the common name Muller oak, or Muller's oak. It was described to science in 1981 when it was segregated from the Quercus dumosa complex and found to warrant species status of its own. It was named for the ecologist Cornelius Herman Muller. It is native to southern California and Baja California, where it grows in chaparral, oak woodlands, and other habitat in foothills and mountains. It can most easily be observed in Joshua Tree National Park and in the woodlands along the western margins of the Colorado Desert in San Diego County, California. Quercus cornelius-mulleri is a bushy shrub not exceeding 3 meters (10 feet) in height. It is densely branched, its tangled twigs gray, brown, or yellowish, fuzzy when new and becoming scaly with age. The evergreen leaves are leathery and thick. They are bicolored: white and quite woolly on the undersides and dull gray- or yellow-green and faintly hairy on the upper surfaces. The wool on the undersides of the leaves is made up of star-shaped leaf hairs that are fused into microscopic plates. The leaf blades are oval with smooth or toothed edges, and measure 2. 5 to 3. 5 centimeters (1. 0-1. 4 inches) in length. The fruit is an acorn with a cap up to 2 centimeters (0. 8 inches) wide covered in light-colored scales and a cylindrical, round-ended nut up to 3 centimeters (1. 2 inches) long.

The majestic blue oak is a drought-tolerant deciduous tree that provides food and shelter for local wildlife. It supports birds, squirrels and insects. It is a host plant for several species of butterflies and moths.

This tree gets its name from its blue-green leaves. The bark is pale gray and textured. Blue oaks are slow-growing, but can grow to 80+ feet in height. The canopy can spread to a width of 30 feet or more. It requires a good-sized planting area and does best on dry, well-drained slopes.

Quercus dumosa is a species of plant in the Fagaceae family. This shrub/small tree goes by the common name Coastal sage scrub oak. It is found in Mexico and the United States. It is threatened by habitat loss. The species Quercus dumosa lends its name to the eponymous plant community Quercus dumosa chaparral, in which Coastal sage scrub oak and toyon often co-dominate. It is easily confused with other scrub oaks such as Quercus berberidifolia, with which it may hybridize.

This plant is an evergreen shrub growing 1 to 3 meters tall from a large, deep root network. The leaves have spiny or toothed edges. The fruit is an acorn up to 1.5 centimeters wide. Some individuals produce large crops of acorns, and some produce very few fruits. The acorns are dispersed by gravity as they fall from the tree, and by animals that pick them up, such as squirrels and jays. Animals eat them immediately or cache them for later. The acorns tend to germinate easily. Reproduction via seed generally occurs only in very moist years.

This oak grows primarily in sandy soils such as sandstone near the coast. Its habitat is often chaparral. This oak sprouts vigorously from its stump and root crown after wildfire and develops a large canopy within a few years after a fire event. It sometimes codominates with Ceanothus species as early as four years after a fire. This oak also does well in the absence of fire.

Leather oak (Quercus durata) is a small, drought-adapted oak species endemic to California. This shrub oak, in the Fagaceae (beech) family, typically grows in serpentine soils and is often found with manzanita in chaparral habitats. It thrives in mountainous regions but is well-suited for gardens as it doesn't require serpentine soil and can tolerate a variety of garden soils, including those with clay. Best adapted to dry, rocky, and nutrient-poor soils, leather oak can form low, dense thickets and is often used as an urban tree.

A keystone plant in its native ecosystem, leather oak supports a diverse range of wildlife species.

Engelmann oak (Quercus engelmannii) is a moderately fast-growing tree, typically evergreen but sometimes drought-deciduous in hot summers. Native to Southern California, this rare oak has lost much of its range due to suburban development. It primarily survives in San Diego County, with smaller populations in Pasadena, Orange County, southern Riverside County, and Baja California.

This oak thrives above the dry coastal plain but below 4,200 feet, where winters can be colder. Its thick, leathery blue-green leaves provide year-round color and complement gray-green landscapes. Mature trees develop stunning, gnarled trunks and wide-spreading branches, making them a striking addition to open spaces.

Engelmann oak can be tricky to grow—it prefers dry soil but stays green year-round if it has access to groundwater or nearby irrigation. It requires plenty of space, full sun, and tolerates various soil types.

As a keystone species, Engelmann oak supports an extensive array of butterflies and birds, playing a vital role in Southern California ecosystems. It pairs well with native plants like ceanothus, coffeeberry, and silktassel.

The Garry Oak (Quercus garryana), also known as Oregon White Oak or Oregon Oak, is a member of the Fagaceae family (Beeches, Chestnuts and Oaks). It has a range from the mountains of Los Angeles County northward to British Columbia, Canada, particularly in the foothills of the Siskiyou and Klamath Mountains, the Coast Ranges of Northern California, and of the west slope of the Cascades. It grows from sea level to 210 meter altitude in the northern part of its range, and at 300-1800 meter in the south of the range. There are three recognized varieties with largely overlapping ranges. The tree is named after Nicholas Garry, deputy governor of the Hudson's Bay Company, 1822-35. In the northerm part of its range it is an attractive tree, sometimes reaching 90 ft. but more often 50-60 ft. In the southern part of its range it is more often a shrub to 20 ft. It has large, lobed leaves which it drops in winter. It makes an excellent tree or shrub for mountain gardens and is important for wildlife.

Garry's Oak (Quercus garryana var. breweri) is a native tree that grows in northern, southern and central California. It tends to grow in slopes, at elevations from 2000-5900 feet.

Oregon White Oak (Quercus garryana var. garryana) is a native tree that grows in central and northern California. It tends to grow in slopes, at elevations from 1000-5900 feet.

Oregon White Oak (Quercus garryana var. semota) is a native tree that grows in northern, southern and central California. It tends to grow at elevations from 2000-5900 feet.

The California Black Oak gets its name from the dark bark color of mature trees. It has distinctive, deeply lobed leaves that turn brilliant shades of yellow and orange in the fall. It is a large deciduous tree that can grow up to 80 feet tall. It also has a large, spreading root system.

Black Oak acorns are an important food source for a wide range of wildlife, including birds, deer, squirrels, and other mammals. It is also a host plant for butterflies and moths. It is a drought-tolerant tree with low moisture requirements. Black Oak grows best in acidic soil.

The Valley Oak (Quercus lobata) grows into the largest of North American oaks. It ranges over the hot interior valleys of California where there is a water table within reach of the roots.

Valley Oaks grow quickly, reaching 20 feet in 5 years, and 40 feet in 10 years, and up to 60 feet in 20 years. Mature specimens may attain an age of up to 600 years. Its thick, ridged bark is characteristic and evokes alligator hide. The sturdy trunk of the Valley oak may exceed two to three meters in diameter and its stature may approach 100 feet in height.

The branches have an irregular, spreading and arching appearance that produces a profound leafless silhouette in the clear winter sky. During autumn, leaves turn a yellow to light orange color but become brown during mid- to late fall.

In advancing age, the branches assume a drooping characteristic. Its pewter-colored rippled bark adds to the attractive aesthetic of this species.

Typically, leaves are five to ten centimeters in length and are roundly and deeply lobed. The leaf width is approximately one half its length. Each leaf is matte green, with a pale green underside; moreover, the leaf is covered with abundant soft fuzz, yielding an almost velvety feeling. When a fresh leaf is rubbed or broken, an aromatic scent is exuded, evoking a forest odor. The wood is a dull brown approaching yellow.

Over most of the range, acorns fall in October. A variety of mammals and birds eat them, including the Acorn Woodpecker, Western Scrub Jay, Yellow-billed Magpie, and California Ground Squirrel. Like many oaks, Valley Oaks can tolerate wildfires. Although smaller individuals may be top-killed, most resprout from the root crown.

Valley oak tolerates cool wet winters and hot dry summers but requires abundant water. It is most abundant in rich deep soils of valley floors below 600 meters in elevation but can also be found at elevations up to 5,600 ft.

Valley oak is found in dense riparian forests, open foothill woodlands and valley savannas. Commonly associated trees are Coast Live Oak, Interior Live Oak, Blue oak, Black Walnut, California Sycamore and Ghost Pine. The Valley Oak is widely distributed in the California Central Valley and many smaller valleys such as the San Fernando Valley.

Because of its eventual size, it may not be appropriate for the average residential garden. Best not to provide irrigation within 30 feet of established valley oaks. They'll often absorb too much water, causing limbs to break off.

They are messy but beautiful. Best to plant near a water source.

Quercus x macdonaldii, formerly Quercus macdonaldii, with the common names MacDonald's oak and Macdonald oak, is a rare species of oak in the Fagaceae family. The tree is endemic to the California Channel Islands, on Santa Cruz Island, Santa Rosa Island, and Santa Catalina Island, in Southern California. It is found in chaparral and woodlands habitats in canyons and slopes below 600 metres (2,000 ft). Quercus x macdonaldii is a Vulnerable species, threatened by habitat loss. Taxonomy. The plant was reclassified as Quercus x macdonaldii, a naturally occurring hybrid of Quercus berberidifolia and Quercus lobata.

Quercus pacifica is a species of oak known by the common names island scrub oak and Pacific oak. It is endemic to the Channel Islands of California, where it is known from Santa Cruz, Santa Rosa, and Santa Catalina Islands. Though limited to three islands, it is not uncommon there, occurring in grassland, chaparral, oak woodlands, forest, and other habitat. It is the dominant oak in many areas on Catalina Island.It was described as a new species in 1994 from a specimen on Santa Cruz Island.This is a shrub or a small tree growing up to five meters in height, or occasionally taller. The leaves are roughly oval in shape and edged with pointed teeth. The green blades are up to 4 centimeters long by 4 wide. They have shiny upper surfaces and waxy, hairy, glandular undersides. The acorn has a cap up to 2 centimeters wide and a nut measuring 2 or 3 centimeters long.

Quercus parvula is an evergreen red oak (Section Lobatae) found on north-facing Santa Cruz Island slopes and in the California Coast Ranges from Santa Barbara County north to Mendocino County. It was taxonomically combined with Quercus wislizeni until resurrected as a separate species by Kevin Nixon in 1980. The type locality is Palo Colorado Canyon in Monterey County. Three varieties of Q. parvula are currently recognized:

Quercus parvula var. shrevei, or Shreve Oak, is an evergreen red oak found in the California Coast Ranges from Santa Barbara County north to Mendocino County. It was taxonomically combined with Quercus wislizeni until resurrected as a separate species by Kevin Nixon in 1980. Recent work suggests Q. parvula var. parvula to be Q. parvula var. shrevei x Q. wislizeni.

It generally occurs in foothills where it is common in the low elevations. It is a large shrub or tree growing to 22 meters (73 feet) tall, although it seldom exceeds 10 meters (33 feet). The dark-green leaves -appearing grayish from a distance. Leaves are usually small, 2-5 cm (0. 8-2. 0 inches) long, thick, and often spiny-toothed at higher elevations. All California red oaks show evidence of introgression and/or hybridization with one another.

Island oak (Quercus tomentella), also known as island live oak or channel islands oak, is an evergreen tree in the Oak family (Fagacea). A smaller oak tree in stature, the leaves are hairy (tomentose) on the upper and lower surfaces, toothes, and large compared to other oaks. Young twigs are also hairy, yet mature bark is gray and furrowed. Mature acorns have rounded tips and are also quite large compared to other species.

Endemic (limited) to six islands off the coast of California, it is also federally listed as a rare species because of its limited distribution in the wild. Island oak's natural habitat is Island canyons, slopes and bluffs. Oak trees support a larger number of wildlife than any type of tree in our state. Multiple mammals, birds, amphibians, and pollinators use oak trees for food and shelter. Indigenous People ground the acorns to make flour, after leaching out the tannins; they may also have roasted and ground them and used it as a coffee alternative.

In the garden it is fast growing and trouble-free. It is best used near the coast, but can tolerate inland conditions within about 20 miles of the coast if given some protection and a little extra water during dry times, especially when the young plant is getting established. The large leaves and dense shade create unfavorable conditions for understory plants; plant island shrubs and perennials with similar growing conditions next to it, rather than under it for better results.

Huckleberry Oak (Quercus vacciniifolia) is a native shrub that grows in northern, southern and central California. It is slow growing and long-lived. It grows in a semi-upright form to a height of 1.3 feet, with active growth during the spring and summer. Flowers are yellow and bloom in the early spring. Leaves are medium green, and remain on the plant throughout the year. It tends to grow in steep slopes and ridges and , at elevations from 3000-10000 feet.

Interior Live Oak (Quercus wislizeni) is a slow-growing, evergreen tree with a distinctive broad crown. The glossy dark green leaves and reddish-brown bark give it a formal look.

In winter and spring, the oak blooms with green and white flowers. The tree's long, narrow acorns serve as a food source for deer.

Interior Live Oak is a resilient and adaptable species. It thrives at elevations ranging from sea level to 5,000 feet, making it an essential part of diverse ecosystems throughout California. Interior Live Oak grows in part to full shade and prefers dry, loamy soil.

Interior Live Oak (Quercus wislizeni var. wislizeni) is a native tree or shrub that grows in northern, southern and central California. It tends to grow in canyons and slopes and valleys, at elevations from 0-5200 feet.

Rhamnus crocea is a species of buckthorn (Rhamnaceae). It is endemic to western North America. This evergreen shrub is typically one to two meters in height. R. crocea typically occurs in chaparral and several other vegetation communities below 3,000 ft. The flowers are not showy; this species is planted for the berries. You may need more than one plant to ensure pollination. It is spiny so consider where you place it. The leaves are small, round, dark green on top and brown or yellow on the underside. The berries and small spheres, bright red.

Hollyleaf Redberry (Rhamnus ilicifolia) is an evergreen native shrub that grows in the foothills and mountains of southern and central California, the Sierra foothills, and the foothills west of Sacremento Valley. It primarily grows at elevations from 500 to 6600 feet. It was formerly considered a subspecies of Rhamnus crocea but is now considered a separate species. Their ranges overlap considerably, and they resemble each other superficially.

This plant is reasonable to grow if properly sited. Plant in part shade or full sun on rocky slopes, or at least with plenty of rocks surrounding it. It seems to prefer part shade in the drier parts of its range.

It can tolerate summer water up to 1x per month. However once established, it's usually happiest without any supplementary water, but in a spot where it can run its roots over to an irrigated area or a place with a little more natural moisture, such as a creek or rain gully. The flowers are inconspicuous; the plant is grown primarily for its springtime bright and shiny red berries. These berries are an important food source for birds.

This plant has small leaves with sharp points along their edges, resembling small holly leaves (thus its common name). These leaves give this plant significant deer resistance. This shrub is quite versatile in garden landscapes, from wildlife habitat to erosion control to hedges and barriers.

In optimal conditions, Hollyleaf Redberry can grow from a 1-gallon container to 3 feet tall in two years.

Pacific Rhododendron, Coast Rhododendron or Big Leaf Rhododendron is a broadleaf evergreen rhododendron species native to western North America. Pacific rhododendron is found along the Pacific Coast from British Columbia to Monterey County in California. It is widely distributed in the Coast and Cascade Mountain Ranges. Pacific rhododendron is less abundant in the Coastal Mountains of Washington and northern Oregon and more common south of the Siuslaw River.

Western Azalea is best known of three Rhododendron species native to California. It occurs as far north as Bandon, Oregon and as far south as the Palomar Mountain area in southern California, possibly also in Baja California, Mexico. It is a shrub capable of growing to 5 meters tall but more commonly around 3 meters. The leaves are deciduous, 3-9 centimeters long and 1-3 centimeters broad. The flowers are 3.5-5 centimeters in diameter, with five lobes on the corolla; color varies from white to pink, often with a yellow blotch. It is most often found in moist forested areas. It typically gets summer fog drip or some other source of summer moisture. It is deciduous and will be leafless for some months out of the year, but does produce interesting fall color. It needs some sun for good flower production but also likes some high shade such as the edge of a woodland.

Grows best in loamy, medium draining soil. Prefers part shade in coastal sites, and part shade or shade in inland sites. North Coast, Klamath Ranges, Outer North Coast Ranges, Inner North Coast Ranges, High Cascade Range, High sierra Nevada, Central Coast, sF Bay area, High sierra Nevada.

Fragrant sumac (Rhus aromatica) is a shrub in the Anacardiaceae (Cashew) family; it has several other common names, including lemonade sumac. It was formerly classified as Rhus trilobata; some sources still refer to it that way. 

It is native to western North America. It occurs in many parts of California, including the northern Coast Ranges, Sierra foothills, and southern coastal mountains. It can be found from deserts to mountain peaks up to about 7,000 feet in elevation.

The pale yellow flowers are followed by a red, fleshy drupe that has a sticky coating, similar to lemonade berry (Rhus integrifolia). This species closely resembles other members of the genus that have leaves with three "leaflets" ("trifoliate" leaves), including poison oak. People with sensitivity to poison oak should use caution around fragrant sumac.

The shape of the leaflets and the habit of the shrub make this species, like some other Rhus species, resemble small-leafed oaks (Quercus). The plant is deciduous and exhibits good fall color.

Lemonade berry (Rhus integrifolia) is an evergreen shrub or small tree. It tends to grow slowly at first, then fast to 10 feet to 30 feet tall. Its form is upright  but it  can sprawl. However, it takes pruning very well and may be pruned, or sheared as a hedge, at any time of year.  The ;eaves are leathery, with a waxy appearance above and a paler tone below. The pink flowers, which appear from February to May, are small but noticeable. The fruit is dark red, block-shaped and sticky, and has a tart flavor which gives the plant its name. 

Lemonade berry is great for slopes. It is easy to grow and very hardy, becoming nearly indestructible once established. At that point it will stay green and healthy-looking year round without any supplementary summer water. It prefers sun or part sun and well-draining soil. 

Lemonade berry is very closely related to Sugar Bush. A good rule of thumb for landscaping applications is within 5-10 miles of the coast, lemonade berry is a better choice. More inland, sugar bush does better.

This is an important wildlife plant. The berries are a significant food source for birds and small mammals, and the thick sprawling form provides excellent animal shelter.  It hosts almost a dozen species of butterfly and moth. 

Sugar Bush (Rhus ovata) is an evergreen shrub to small tree that grows in chaparral in dry canyons and slopes below 4300 feet in southern California, Arizona and Baja California. In the southern part of its range (in Los Angeles, Orange and San Diego Counties), Sugar Bush generally grows in the foothills and mountains, and the closely related Lemonade Berry (Rhus integrifolia) grows closer to the coast.

It has a rounded appearance, often growing wider than tall. Sugar Bush has thick,breddish twigs. Its foliage consists of dark-green, leathery, ovate leaves that are folded along the midrib. The leaf arrangement is alternate.

Its flower clusters, which occur at the ends of branches, consist of small, five-petaled flowers that appear to be pink but upon closer examination actually have white to pink petals with red sepals. Additionally, the flowers may be either bisexual or pistillate. The fruit is a small reddish, sticky drupe, about 0.2 to 0.5 inches in diameter, that is said to be edible.

Sugar Bush is tough, easy to grow, and very fast growing once established. A 5-gallon container plant will reach 10 feet in about three years if happy.

In nature, you'll almost always see Sugar Bush on slopes, though it grows well on flat areas in garden applications. It's one of the few larger chaparral shrubs that grows well in south-facing slopes even in the drier parts of its range, and it's a great bank stabilizer. It tolerates a wide variety of soils.

It grows fastest with full sun, just a little slower in part shade. It tolerates summer water up to 1x per month but shouldn't need any once established. It is incredibly healthy and typically will appear green and lush through the entire dry season without any supplementary water.

The biggest downside of this plant is that it can get huge, often more than 30 feet wide, and can aggressively crowd out nearby plants. It is said to be fire resistant, especially if given supplemental water.

Sugar Bush hybridizes often with Lemonade Berry (Rhus integrifolia). A good rule of thumb for landscaping applications is: Within 5-10 miles of the coast, Lemonade Berry is a better choice. More inland, Sugar Bush does better.

Ribes amarum is a species of currant known by the common name bitter gooseberry. It is endemic to California, where it is known from mountains, foothills, and canyons. Its habitat includes chaparral. Ribes amarum is a shrub growing to one to two meters (40-80 inches) in height. Nodes along the stem each bear three spines up to a centimeter (0. 4 inch) in length. The hairy, glandular leaves are 2 to 4 centimeters (0. 8-1. 6 inches) long and generally rounded in shape, divided into 3 to 5 rounded toothed lobes. The inflorescence is a solitary flower or raceme of up to three flowers which hang from leaf axils. The showy flower has five pointed sepals in shades of purple-red which are reflexed upward. At the center is a tubular corolla of white or pink-tinged petals around five stamens and two styles. The fruit is a bristly berry up to 2 centimeters wide which is bright red, ripening purple.