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Carmel Ceanothus

Ceanothus thyrsiflorus var. griseus

Carmel ceanothus (Ceanothus thyrsiflorus var. griseu) is a flowering shrub available in many named cultivars. In winter to spring its evergreen leaves are densely covered with small blue or purple flowers. This native plant is endemic to coastal California. It grows in the chaparral, coastal scrub, and closed-cone-pine forest plant communities.

The flowers become food sources for larvae of some butterfly and moth species, bees, and other beneficial insects. 

Carmel ceanothus is the most popular ceanothus for California garden. Gardeners find it easy to grow and fast-growing. It will take a wide range of soils and can tolerate summer water up to twice a week.

Take care with pruning and do not prune heavily. You should not cut back into old wood. Instead, promote new shoots by pruning the tip of stems where growth is active. Also, you can trim off dead branches on the interior of the shrub to improve its shape and attractiveness. 

Cultivars of Carmel ceanothus have variable leaf and flower colors and grow to different heights and widths.  Calscape features:

Diamond heights mountain lilac (Ceanothus thyrsiflorus var. griseus 'Diamond Heights') 

Kurt Zadnik Carmel ceanothus (Ceanothus thyrsiflorus var. griseus 'Kurt Zadnik') 

Louis Edmunds Carmel ceanothus (Ceanothus thyrsiflorus var. griseus 'Louis Edmunds') 

Point Sal Carmel creeper (Ceanothus thyrsiflorus var. griseus 'Point Sal') 

Santa Ana Carmel ceanothus (Ceanothus thyrsiflorus var. griseus 'Santa Ana') 

Yankee Point Carmel Ceanothus (Ceanothus thyrsiflorus var. griseus 'Yankee Point') 

Diamond Heights Mountain Lilac

Ceanothus thyrsiflorus var. griseus 'Diamond Heights'

Horticultural selection from Ceanothus thyrsiflorus var. griseus. In the mainstream horticultural trade continues to use the older name for, which is Ceanothus griseus var. horizontalis This unusual low growing Ceanothus hybrid will definitely appeal to those who are attracted to variegated foliage. A bright low-growing shrub with chartreuse leaves splashed with dark green. Foliage is brightest in warm weather and full sun, and will be greener in winter or if heavily shaded. Remove any stems with solid green leaves that periodically develop.This ceanothus is fast growing to 1' tall and 4' to 6' wide, with light blue flowers appearing in spring. We recommend placing in full sun on the coast and shade or part shade inland. It is an excellent choice for containers, along a shady border or spilling over a wall. Diamond Heights Ceanothus is suitable for planting in the dry shade beneath native oaks and combines well with Blue-eyed grass and Coffeeberry. Frost hardy to 2 degrees F, and drought tolerant once established.


This was a sport selected by Barry Lehrman in 1985 from a planting of Carmel Creeper (Ceanothus griseus var. horizontalis), that was found in the Diamond Heights neighborhood on Mount Davidson, in the center of san Francisco Grows best in sandy, coarse-grained or other fast draining soil. Prefers sun in coastal sites, and part shade in inland sites. Selected by Barry Lehrman in 1985 from the Mount Davidson area of san Francisco and named for the housing development where it was found.

Creeping Blueblossom

Ceanothus thyrsiflorus var. thyrsiflorus

Creeping Blueblossom (Ceanothus thyrsiflorus var. thyrsoflorus) is a the low growing form and variety of the native shrub and tree Ceanothus thyrsiflorus. It native range is coastal central and northern California, extending from northern Santa Barbara County to near the Oregon border, growing 1- 5 miles from the shore. The other variety of this species, Ceanothus thyrsiflorus var. griseus (Carmel Ceanothus) is much more variable in form and is native to habitats closer to the coast.
Creeping Blueblossom was previously classified as Ceanothus thyrsiflorus var. repens.

Creeping Blueblossom has profuse attractive sky blue flowers and makes an excellent ground cover plant. It prefers full sun to part shade in cooler coastal environments, and part shade to full shade in hotter and drier inland environments. It tolerates occasional light summer water, but is quite drought tolerant. It grows well in many different soil types, from clay to sand, and can tolerate poorly draining and fast draining conditions.

Cultivars in the nursery trade include:
Ceanothus thyrsiflorus var. thyrsiflorus 'Taylor's Blue' (Taylors Blue Ceanothus). This is a shrub ground cover growing 2-3 feet tall by 10-15 feet wide. It was introduced in the 1950s as Ceanothus thyrsiflorus 'Louis Edmunds' by the Saratoga Horticultural Foundation, from a plant in nurseryman Ken Taylor's natives garden in Aromas, originally from the garden of nurseryman Louis L. Edmunds. It was previously named and is sometimes still sold as C. t. var. repens 'Taylor's Blue'.
Ceanothus thyrsiflorus var. thyrsiflorus 'Louis Edmunds' (Louis Edmunds Blue Blossom). This is a prostrate ground cover growing 6 inches tall by 6 to 8 feet wide, and is the lowest cultivated form of C. t. var. thyrsiflorus. It introduced by Rancho Santa Ana Botanic Garden (California Botanic Garden) in 1958 as Ceanothus griseus 'Louis Edmunds' from a plant given them by Louis L. Edmunds, who operated the Louis Edmunds Native Plant Nursery in Danville.
This is not the same plant as the cultivar Ceanothus thyrsiflorus var. griseus 'Louis Edmunds' (Louis Edmunds Carmel Ceanothus) nor the formerly named Ceanothus thyrsiflorus 'Louis Edmunds' (currently C. t. var. thyrsiflorus 'Taylors Blue').

Catalina Island Mountain Mahogany

Cercocarpus traskiae

Cercocarpus traskiae, known by the common names Santa Catalina Island mountain-mahogany and Catalina mahogany, is a rare species of plant in the rose family. It is endemic to Catalina Island, one of the southern Channel Islands in Los Angeles County, ]]California]]. It is known from just a single population. It was rare when it was first discovered in 1897 or 1898, when about 40 to 50 plants were counted. When it was federally listed as an endangered species in 1996 there were only six mature plants remaining. It has been called "one of the rarest shrubs in the continental United States" and "one of the rarest trees in North America. " in Wild Boar Gully, an arroyo covered in coastal sage scrub on Catalina. The steep sides of the arroyo contain soils of saussurite gabbro. Cercocarpus traskiae is a large shrub or tree that grows up to 8 meters in height. The leaves have thick, leathery oval blades with serrated edges and woolly-haired undersides. The leathery, woolly texture of the leaves distinguishes it from other Cercocarpus. The inflorescence is a cluster of up to 10 flowers which do not have petals. Plants do not always flower each year. While there are sometimes many seedlings noted, the seedling survival rate and rate of recruitment are quite low. As of 2007, there are only seven adult trees capable of reproduction, all located in Wild Boar Gully, and most of these are very old. The Catalina Island mountain mahogany is threatened by ungulates such as deer, and feral goats and pigs. The goats have been removed from the island, and fencing has been placed to prevent the remaining animals from touching the plants. This rare species hybridizes with its relative, Cercocarpus betuloides, a situation that may lead to genetic swamping of the rare plant. This hybridization may be made more likely by the animals' disturbance of the habitat. Many of the seedlings and saplings growing today may be hybrids. The population of pure Cercocarpus traskiae is not increasing and the species is entirely dependent on human intervention today.

Summer Holly

Comarostaphylis diversifolia

Comarostaphylis diversifolia is a rare shrub in the heath family known by the common name Summer Holly. It is slow growing in an upright form up to a height of 20 feet or more, with striking white flowers in the spring, an incredible summer display of holly-like red berries , and attractive gray bark. It is native to southern California and northern Baja California, where it grows in coastal chaparral habitat, usually on well drained slopes. Its bark is gray and shreddy and the tough, evergreen leaves are oval in shape and sometimes toothed. The flower cluster is a raceme of urn-shaped flowers very similar to those of the related shrubs, the manzanitas. The fruit is a bright red, juicy drupe with a bumpy skin. There are two subspecies. C. d. ssp. diversifolia - native to the coastal hills of southern California and Baja California, C. d. ssp. planifolia - native to the Channel Islands of California and the Transverse Ranges north of Los Angeles. Subspecies diversifolia tends to grow with Mission Manzanita, Scrub Oak and Toyon.

In nature, Summer Holly is most often found on shady dry slopes, near occasional creeks or runoffs. It grows slowly until it breaks through the lower canopy, and gets its leaves in the sun. In landscapes it does best in dry part shade, near irrigated spots or other slightly damp areas. It prefers heavier, richer soils that retain the little moisture it gets a little longer. Best to plant Summer Holly in the fall, so it can get established by summer. This plant is among the least tolerant to direct water in the summer. After the first year, direct water in the summer will usually kill it.

Warriner Lytle Buckwheat

Eriogonum fasciculatum 'Warriner Lytle'

Warriner Lytle Buckwheat, Eriogonum fasciculatum 'Warriner Lytle', is a low horticultural selection of the perennial soft woody shrub species Eriogonum fasciculatum (California Buckwheat). This tough and drought tolerant native cultivar combines the hardiness and habitat value of the species, with the garden versatility of its selected low-growing form. This dependable groundcover plant is adaptable and easy to grow.

Warriner Lytle Buckwheat can reach 1-2' high but is often more prostrate. Its arching branches can spread 4'-5' wide. Fine dark-green, needle-like green leaves are topped in the summer by globe shaped clusters of pinkish-white to cream flowers, that then age to a rusty red-brown in late summer or autumn. It adds floral color to the summer native garden, and is a major draw in butterfly, pollinator, and bird habitat gardens. This low buckwheat makes a good ground cover, or an accent plant beside patios and pathways for enjoying the blooms and many butterflies they attract. With its dense foliage coverage and deep roots this ground cover is good for erosion control, slope stabilization, suppressing weed germination, and dry hot slopes.

California Buckwheats are a favorite nectar source for many butterfly species, native leaf cutter bees, and honey bees. As the summer progresses into autumn the birds will flock to feed on the seeds. Warriner Lytle Buckwheat will tolerate almost any soil type, including clay when planted on slopes or raised mounds, and take summer's high heat. Once established it needs very little water, one can provide occasional deep watering or none. Eriogonum fasciculatum 'Warriner Lytle' was selected and introduced for gardens by the Theodore Payne Foundation in Los Angeles, who named it for one of their dedicated volunteers.

Leafy California Buckwheat

Eriogonum fasciculatum var. foliolosum

Leafy California Buckwheat, (Eriogonum fasciculatum var. foliolosum), is one of the four recognized varieties of this widespread species, and the one most often seen in populated areas of southern California. However, it is fairly common throughout central and southern California along the coast and on western side of the peninsular range, where it grows on dry slopes, washes and canyons, at elevations from sea level to 5,200 feet.

This plant is tough and easy to grow, even in very dry conditions. Plant in a well draining sunny site. It shouldn't need supplemental water after established, but it will tolerate occasional summer water better than most extremely drought tolerant California natives. Form is is variable, ranging from more often open and upright in the foothills, to often dense and mounding closer to the coast. As the plant ages, it often develops a beautiful ropy red, brown and gray ropy woody trunk and interesting twisting structure. Produces profuse pink to white and cream-colored flowers as early as March that dry to a pretty red rust color as the soil dries. It sheds its dried flowers and significant portion of its small blade-like leaves each dry season, and is an important plant for creating natural mulch. California Buckwheats are a keystone species for sagebrush scrub ecosystems, and a great choice for wildlife and butterfly gardens.

For further detail please refer to the listing for the main species, Eriogonum fasciculatum.

Western California Coffeeberry

Frangula californica ssp. occidentalis

Western California Coffeeberry (Frangula californica subsp. occidentalis) grows in northern California and southwest Oregon, on serpentine soils. Fruit with three seeds; twigs brown; leaves with inconspicuous veins. In favorable conditions the plant can develop into a small tree over 6 meters tall. More commonly it is a shrub between 1 and 2 meters tall. The branches may have a reddish tinge and the new twigs are often red in color. The alternately arranged evergreen leaves are dark green above and paler on the undersides. The leaves have thin blades in moist habitat, and smaller, thicker blades in dry areas. The small greenish flowers occur in clusters in the leaf axils. The fruit is a juicy drupe which may be green, red, or black. It is just under a centimeter long and contains two seeds that resemble coffee beans. This subspecies of Frangula californica has fruit with three seeds; twigs brown; leaves with inconspicuous veins. It can live an estimated 100 to 200 years.The plant reproduces sexually by seed and vegetatively by sprouting. After wildfire or cutting, the plant generally resprouts from its root crown. Reproduction via seed is most common in mature stands of the plant. It produces seeds by 2 or 3 years of age. Seeds are mature in the fall. Seed dispersal is often performed by birds, which are attracted to the fruit; some plants are so stripped of fruit by birds that hardly any seeds fall below the parent plant. This long-lived plant is persistent and becomes a dominant species in many habitat types, such as coastal woods. In the absence of wildfire, the shrub can grow large, with a wide spread that can shade out other flora. When fire occurs, the plant can be very damaged but it readily resprouts from the surviving root crown, which is covered in buds for the purpose. It reaches its pre-burn size relatively quickly.Parts of the plant, including the foliage and fruit, are food for wild animals such as mule deer, black bears, and many birds, as well as livestock

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