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Project Name Data (Last Modified On 5/30/2013)
 

Flora Data (Last Modified On 5/30/2013)
Genus Sarcostemma R. Br
PlaceOfPublication Mem. Wern. Soc. 1: 50. 1809.
Note TYPE: S. viminale (L.) R. Br.
Description Slender vines, herbaceous or suffrutescent, pubescent or glabrous, sometimes glaucous. Leaves opposite. Inflorescence axillary, umbellate, usually pedunculate. Flowers with the calyx small, 5-lobed, minutely 5-glandular within at the base, the lobes acute; corolla generally white, greenish-white, or sometimes purplish, broadly campanulate or subrotate, shallowly or deeply 5-lobate, usually de- pressed globose in bud; stamens inserted on the base of the corolla, the corona of 5 inflated vesicles adnate to the base of the staminal tube, usually equaling or overtopping the gynostegium, the apices flat, concave or convex, almost al- ways joined by a fleshy annulus which is adnate to the corolla throat, its margin entire, filaments connate into a short tube, the anthers terminated by an inflexed membrane; pollinia pendulous, oblong or elongated; stigma flat or umbonate or with a short bifid apical beak. Fruit a single follicle usually slender, terete, acuminate, smooth, glabrous or pubescent.
Habit vines
Reference Holm, R. W. The American species of Sarcostemma R. Br. (Asclepiadaceae). Ann. Missouri Bot. Gard. 37: 477-560. 1950.
Distribution A genus of about 35 species found throughout warm and tropical regions. The New World species are concentrated in South Amercia, the following three reported from Panama.
Key a. Leaf bases cordate ...... 1. S. bilobum aa. Leaf bases attenuate to rounded, occasionally truncate but not cordate. b. Corolla rotate-subcampanulate, not constricted at the throat; ovaries white seri- ceous ...... 2. S. clausum bb. Corolla salverform, the tube constricted at the throat; ovaries glabrous ...... 3. S. glaucum
 
 
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