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

    THIS PAGE IS NO LONGER UPDATED
    AND IS MAINTAINED FOR ARCHIVAL PURPOSES ONLY
  • Up-to-date information about California vascular plants is available from 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.

previous taxon | next taxon
bioregional map for CYCLADENIA%20humilis being generated
 


Retrieve Jepson Interchange Index to Plant Names entry for Cycladenia humilis
Retrieve dichotomous key for Cycladenia
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
Glossary


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