The open plant encyclopedia
Snap a photo or search by any name to see how to care for it, where it comes from, whether it's safe, and a 3D model you can turn.
The plants people record most in your country, and ones that grow there wild.
Filter by what you want to do, shape, origin, country, care and safety.
Aesculus californica
California buckeye is a large deciduous shrub or small multi-trunked tree native to California and southwestern Oregon, known for early spring flowers and large pear-shaped fruit capsules. It is drought deciduous, so it can drop its leaves in late summer in dry areas.
Aesculus californica, commonly known as the California buckeye or California horse-chestnut, is a species of flowering plant in the soapberry family (Sapindaceae) native primarily to California and southwestern Oregon. It is a large shrub or small tree, often with several trunks and a broad, rounded crown. It has palmately compound leaves that bloom early in spring, followed by erect clusters of white to pale pink flowers in late spring and large, pear shaped fruit capsules in late summer.
California buckeye is drought deciduous: in drier, more inland areas, its leaves commonly fall off and die during late summer, while specimens in moister coastal environments retain their leaves longer into autumn. The large, glossy seeds and other parts of the plant contain toxic glycoside compounds.
Indigenous peoples of California, including the Pomo, Yokuts, and Luiseño communities, used the poisonous nuts and seeds to stupefy schools of fish in small streams to make them easier to catch.
Diving deeper into the toxic seeds, research has found that buckeye seeds can sometimes germinate even after being partially eaten by predators such as rodents. In a greenhouse experiment, about 53% of seeds that had been invaded by rodents germinated, versus approximately 98% of undamaged seeds. Even though damaged seeds were less likely to germinate and produced smaller seedlings, some seeds with a good amount of damage still managed to grow. Mendoza and Dirzo suggested that the seeds’ large size and stored food reserves may help them handle predator tampering.
California Buckeye is the only Aesculus species native to the western United States. A. californica is widely distributed in California, growing in the Klamath Mountains and California Coast Ranges from the Siskiyou Mountains south to Los Angeles County and in the Cascade Range and lower elevations of the Sierra Nevada from Shasta County to Kern County. A small, disjunct population occurs near Gold Hill in the Rogue Valley in Jackson County, Oregon, separated from the California populations by quite a distance.
Yellow buckeye · Ohio buckeye · Horse-chestnut · Indian Horse Chestnut · Bottlebrush Buckeye · Red buckeye · Buckeyes & Horse-chestnuts
Text excerpted from the Wikipedia article Aesculus californica by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
Pet safety from the ASPCA toxic and non-toxic plant lists.
