Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

  • Up-to-date information about California vascular plants is available from the Jepson eFlora.



Lauramay T. Dempster

Perennial (sometimes annual, shrub, vine, tree); sap milky
Leaves simple, entire, opposite, alternate, or subwhorled; stipules 0 or small
Inflorescence: cyme; flowers 1–many, axillary or terminal
Flower bisexual, radial; perianth parts overlapping, at least in bud; sepals 5, fused at base, persistent; petals 5, fused in ± basal half; stamens 5, attached to corolla tube or throat, alternate lobes; ovaries 2, ± superior, generally free, styles and stigmas fused
Fruit: generally 2 follicles
Seeds many, often with tuft of silky hairs
Genera in family: ± 150–200 genera, 1000–2000 species: especially tropical; many ornamental (Nerium, oleander; Plumeria , frangipani); some alkaloids highly toxic, some used in medicine
Recent taxonomic note: Recently treated to include Asclepiadaceae
Reference: [Rosatti 1989 J Arnold Arbor 70:307–401]


Plant fleshy (including large root), glabrous to tomentose
Stem ± erect
Leaves opposite
Inflorescence: flowers 2–6 near tips of axillary peduncles
Flower: calyx lobes slender; corolla funnel-shaped with 5 rounded appendages behind anthers; stamens appearing attached at base of corolla tube but filaments epipetalous up to stigma level, anthers forming cone around but free from stigma, each partly sterile, sharply sagittate; nectary disk 5-lobed, around and < ovaries; style thread-like, stigma skirted at base
Seed with tuft of long hairs
Species in genus: 1 sp.: CA
Etymology: (Greek: ring gland, from nectary)


C. humilis Benth.

Plant 6–12 cm, generally glabrous, glaucous
Leaf: pairs 2–5; leaf < 9 cm; petiole < to > blade; blade ovate or rounded
Flower: calyx lobes narrowly triangular; corolla 15–20 mm, rose-purple, lobes obovate or round, margins wavy; filaments hairy
Fruit 3–5 cm
Ecology: Sandy flats to talus slopes in open pine forest, chaparral
Elevation: 1200–2800 m.
Bioregional distribution: Klamath Ranges, High North Coast Ranges, High Cascade Range, n High Sierra Nevada, Outer South Coast Ranges, San Gabriel Mountains, East of Sierra Nevada
Horticultural information: TRY.

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