Jepson Flora Project: Jepson Interchange    

link to manual TREATMENT FROM THE JEPSON MANUAL (1993) previous taxon | next taxon
Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit the Jepson eFlora.



Annual to tree
Leaves generally compound, alternate, stipuled; leaflets generally entire
Inflorescence: generally raceme, spike, umbel or head; flowers sometime 1–2 in axils
Flowers generally bisexual, generally bilateral; hypanthium generally flat or cup-like; sepals generally 5, fused; petals generally 5, free, or the 2 lower ± fused; stamens 1–many, often 10 with 9 filaments at least partly fused, 1 (uppermost) free; pistil 1, ovary superior, generally 1-chambered, ovules 1–many, style, stigma 1
Fruit: legume, sometimes including a stalk-like base above receptacle, dehiscent, or indehiscent and breaking into 1-seeded segments, or indehiscent, 1-seeded, and achene-like
Seeds 1–several, often ± reniform, generally hard, smooth
Genera in family: ± 650 genera, 18,000 species: worldwide; with grasses, requisite in agriculture and most natural ecosystems. Many cultivated, most importantly Arachis , peanut; Glycine , soybean; Phaseolus , beans; Medicago ; Trifolium ; and many orns
Reference: [Polhill & Raven (eds) 1981 Advances in legume systematics; Allen & Allen 1981 Leguminosae]
Family description and key to genera by Duane Isely.



Elizabeth McClintock

Shrub, tree, unarmed
Leaves simple, alternate, cordate to reniform, ± leathery, glabrous
Inflorescence umbel-like, axillary on short spur or ± sessile on woody branches
Flowers bilateral, appearing before leaves; sepals fused at base; petals pink, upper one inside lateral ones in bud, keel petals free; stamens 10, generally included, free
Fruit dehiscent, oblong, flat
Species in genus: 5–7 species: n hemisphere
Etymology: (Greek: applied perhaps to a poplar, but also to C. siliquastrum , Judas tree)
Reference: [Isley 1975 Mem New York Bot Gard 25(2):134–150]


C. occidentalis Torr.


Tree < 7 m, glabrous
Leaf deciduous, < 10 cm; petiole 15–20 mm
Inflorescence 2–5-flowered
Flower: keel petals 12–13 mm, > wings and banner
Fruit 5–8 cm
Ecology: Dry, shrubby slopes, canyons, ravines, streambanks, chaparral, foothill woodlands to yellow-pine forest
Elevation: 100–1500 m.
Bioregional distribution: Northwestern California, Cascade Range, Sierra Nevada, San Joaquin Valley, Peninsular Ranges
Horticultural information: DRN, SUN: 4, 5, 6, 14, 15, 16, 17, 18, 22, 23, 24; &IRR or part SHD: 1, 2, 3, 7, 8, 9, 12, 19, 20, 21; also STBL; CVS.

previous taxon | next taxon
bioregional map for CERCIS%20occidentalis being generated
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Cercis occidentalis
Retrieve dichotomous key for Cercis
Overlay Consortium of California Herbaria specimen data by county on this map
Show other taxa with the same California distribution | Read about bioregions | Get lists of plants in a bioregion
Return to the Jepson Interchange main page
Return to treatment index page
  • This page is no longer being maintained.

University & Jepson Herbaria Home Page |
General Information | University Herbarium | Jepson Herbarium |
Visiting the Herbaria | On-line Resources | Research |
Education | Related Sites
Copyright © by the Regents of the University of California