Jepson Interchange (more information)
Print edition is available from the University of California Press
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This page is based on the 1993 Jepson Manual.
Please see the Jepson eFlora for up-to-date information about California vascular plants. |
| Jepson Flora Project: Jepson Interchange |
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TREATMENT FROM THE JEPSON MANUAL |
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Jepson Interchange (more information) |
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©Copyright 1993 by the Regents of the University of California
Print edition is available from the University of California Press |
| The second edition of The Jepson Manual (2012) is available from the University of California Press | |
| See also the Jepson eFlora, which parallels the Second Edition |
Annual, perennial herb, shrub, vine; sap milky
Leaves simple, generally opposite or whorled; stipules 0 or small
Inflorescence: cyme, terminal or axillary, umbel- or raceme-like, or flower solitary
Flower bisexual, radial; sepals 5, generally reflexed; petals 5, generally reflexed or spreading; stamens 5, fused to form filament column and anther head, generally with 5 elaborate appendages on outside of filament column, pollen removed in pairs of massive sacs; ovaries 2, superior, free, style tips generally fused into massive pistil head surrounded by anther head
Fruit: follicle (1 ovary generally aborts)
Seeds many, ± flat, with tuft of silky hairs
Genera in family: 50–250 genera, 2000–3000 species: especially tropical, subtropical South America, s Africa; ornamental (Asclepias, Hoya, Stapelia). Cardiac glycosides produced by some; used as arrow poisons, in medicine to control heart contraction, and by some insects for defense
Recent taxonomic note: Recently treated to be included within Apocynaceae
Perennial, shrub
Stem twining (elsewhere sometimes prostrate to erect)
Leaves opposite; blade often ± cordate
Inflorescence: flowers 1–2, axillary (elsewhere various)
Flower: corolla ± spreading, ring of tissue at base 0; filament-column appendages generally fused margin-to-margin into 5-lobed, cup- or plate-like structure around anther head, fused to base of filament column, each lobe with a vertical, flap-like ridge; pistil head flat
Fruit erect or pendent, fusiform to ± ovoid, smooth, generally tubercled
Species in genus: ± 200 species: tropical, warm temp Am
Reference: [Stevens 1976 Diss Abstr B 37(2):587]
| Native |
Perennial
Stem slender, much-branched, < 0.5 m
Leaf: blade 0.5–2 cm, cordate-sagittate
Flower: corolla greenish or purple, each sinus with acute, turned-out tooth
Fruit ± 7 cm, with fine longitudinal grooves
Ecology: Dry rocky areas
Elevation: 700–1000 m.
Bioregional distribution: Desert
Distribution outside California: to Nevada, Texas, Baja California
Flowering time: Mar–May
Populations widely scattered.
See the CNPS Inventory for information about endangerment and rarity.| 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). |
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