Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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Barry A. Prigge

Shrub (sometimes climbing), tree, sometimes thorny, generally glabrous
Leaves simple, opposite or alternate, ephemeral to persistent, subsessile or petioled; veins pinnate
Inflorescence: cluster, cyme, raceme, panicle, or flower solitary, axillary or terminal, bracted
Flower generally bisexual, radial, small; hypanthium ± cup-shaped; sepals 4–5; petals (0)4–5, free; stamens 4–5, alternate petals, attached below or to rim of disk; ovary superior or ± embedded in disk, 2–5-chambered, placentas axile or basal, style generally 1, short, stigma ± head-like, 2–5-lobed
Fruit: capsule, winged achene, berry, drupe, or nutlet, often 1-chambered
Seed generally 1 per chamber, arilled
Genera in family: 50 genera, 800 species: worldwide, especially se Asia; some ornamental (Celastrus, Euonymus, Maytenus,, Paxistima )
Reference: [Brizicky 1964 J Arnold Arbor 45:206–234]



Shrub, small tree, erect, glabrous
Stem: twig generally 4-angled, with corky ridges
Leaves opposite, deciduous, generally scalloped or finely toothed
Inflorescence axillary, few-flowered; pedicel jointed to peduncle
Flower: parts in 5's; petals ± green or purple; disk fused to hypanthium, flat, ± 5-lobed; stamens short, attached to disk margin; ovary embedded in disk, sometimes bumpy or warty, style 0 or short, stigma lobes 3–5, obscure
Fruit: capsule, loculicidal; valves 3–5
Seed white, red, or black, enclosed by orange or red aril
Species in genus: 180 species: especially tropical s hemisphere
Etymology: (Greek: good name)
Reference: [Blakelock 1961 Kew Bull 210–290]


E. occidentalis Torr.


Plant 2–6 m
Stem: branches slender, often climbing
Leaf: petiole 3–15 mm; blade 3–14 cm, ovate to obovate, thin, base truncate to tapered
Inflorescence 1–5-flowered; peduncle 2–7 cm, slender; pedicel 5–15 mm
Flower: sepals 1–1.5 mm, 1.5–2.5 mm wide; petals 4–6.5 mm, brown-purple, finely dotted, margin transparent; disk ± 3 mm wide
Fruit depressed, deeply 3-lobed, smooth
Seed 4–6 mm, brownish; aril ± red
Ecology: Shaded streambanks, canyons
Elevation: < 2000 m.
Bioregional distribution: Northwestern California, Central Western California, Peninsular Ranges
Distribution outside California: to Washington


var. occidentalis

Ecology: Shaded streambanks, canyons
Elevation: 20–1600 m.
Bioregional distribution: Northwestern California, Central Western California
Distribution outside California: to Washington
Horticultural information: SHD, IRR or WET: 1, 2, 7, 14 &SUN: 4, 6, 15, 16, 17.

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bioregional map for EUONYMUS%20occidentalis%20var.%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 Euonymus occidentalis var. occidentalis
Retrieve dichotomous key for Euonymus
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
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