Data provided by the participants of the Consortium of California Herbaria

View additional distribution information on the Jepson eflora

Olneya tesota is a perennial flowering tree of the Fabaceae family, legumes (peas, beans, etc), which is commonly known as Ironwood or Desert Ironwood. It is the only species in the monotypic genus Olneya. This tree is part of the western Sonoran Desert complex in the Southwestern United States, which includes flora such as palo verde, saguaro, ocotillo, brittlebush, creosote bush, and mesquite. The Desert Ironwood grows as a bush or tree and reaches heights of about 10 meters (33 feet), and average trunk diameters of about 60 centimeter (24 inches); in exceptional sites in larger protected washes, greater height and more massive.

Plant type

Tree

Size

20 - 33 ft Tall

Form

Rounded

Growth rate

Slow

Calscape icon
Color

Purple

Flowering season

Spring

Sun

Full Sun

Water

Low

Ease of care

Moderate

Soil drainage

Fast

Soil description

Adaptable, tolerant of sand, loam and clay.

Propagation

For propagating by seed: Fresh seeds need no treatment; soaking in water 12-24 hrs. may improve germination. Stored seeds soak in water 24-36 hrs.; scarification before soaking may improve germination. Seedlings damp-off readily (USDA Forest Service 1974).

Sunset Zones

8, 9, 10, 11, 12*, 13*, 14, 19, 21, 23

Site type

Washes

Plant communities

Creosote Bush Scrub

Caterpillars
Butterflies

Butterflies and moths supported

1 confirmed and 1 likely

Confirmed Likely

Funereal Duskywing

Erynnis funeralis

Glaucina eupetheciaria