Jepson Flora Project: Jepson Interchange    

 
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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.

APOCYNACEAE

DOGBANE FAMILY

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]

CYCLADENIA

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)

Native

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.

Native

var. humilis

Plant generally glabrous, glaucous, sometimes densely tomentose throughout
Ecology: Loose gravel or sand, talus slopes, often with ponderosa pine
Elevation: 1200–2800 m.
Bioregional distribution: Klamath Ranges, High North Coast Ranges, High Cascade Range, n High Sierra Nevada (Plumas, Sierra cos.)
Synonyms: var. tomentosa (A. Gray) A. Gray
Tomentose and glabrous plants occur together.

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bioregional map for CYCLADENIA%20humilis%20var.%20humilis 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 Cycladenia humilis var. humilis
Retrieve dichotomous key for Cycladenia
Overlay Consortium of California Herbaria specimen data by county on this map
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