Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
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ASCLEPIADACEAE

MILKWEED FAMILY

Carol A. Hoffman

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

ARAUJIA

BLADDER-FLOWER

Perennial
Stem twining
Leaves opposite; blade cordate, hastate, or ovate
Inflorescence raceme- or panicle-like
Flower: sepals large, leaf-like, ± erect; corolla ± erect (> stamens, pistils), ring of tissue at base 0; filament-column appendages free, attached to base of filament column and base of corolla, without projections, solid (margins curved out but not nearly meeting on side away from column)
Fruit pendent, generally ovoid, with coarse longitudinal grooves
Species in genus: 5 species: South America
Etymology: (P.A. de Matos Araujo, probably a Brazilian or Portuguese collector, born probably latter 1700's)
Reference: [Spellman & Gunn 1976 Castanea 41:139–148]

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bioregional map for ARAUJIA being generated
 
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