1072 ASCLEPIADACEAE 
23. - Michauxii Decne. Stems usually de CE 1-13 dm. em 
minutely pubescent: leaf-blades linear, often n rrowly so, 4—9 dm. long: umbe 
many-fo owered, the pedicels 1—1.5 e m. long: os a greenish, elliptic, 5— 6 
long: hoods 3-3.5 mm. ge pe the androecium; horn stoutish, 
i than the ho od: column about 0.5 mm, pta follicles 8-14 cm. long.— 
Pinelands and sandhills, QUEE Plain, Fla. to Miss. and S, C.—Spr. 
24. A. cinerea Walt. Stem 3-5 dm. tall, sometimes slightly pubescent in lines: 
leaf-blades ene linear or filiform , 3-9 c m. long: um mbels usually paired at 
the top of the stem and additional ones Ein in the upper axils, m S IU 
mostly 1.5-2 em. long: corolla-lobes purplish, 5-7 mm. long: hoods about 3 
j pi androeci 
mm. high, mueh shorter than ndroecium, each with 2 lateral acute lobes 
which a the broad horn: anthers about 2 mm. long: follicles 8-10 1 
long.—Rather dry pinelands, Coastal Plain, Fla. to Miss. and 8. C.—Spr.-sum. 
7. BIVENTRARIA Small. Erect herbs with broad leaf-blades. Umbels 
solitary or paired, or sometimes 3 or 4 at the top of the stem. Calyx-lobes 5. 
zontally. Anther-wings curved upward from 
the base and salient just below the middle. 
Follicles fusiform. Seed with a coma.—One 
ecies. 
1. t variegata (L.) Small. Stem 3-9 dm 
tall, glaucous, sometimes pubescent above: 
i blades typica ny o oval, varying to ovate 
or obovate, 6-14 lo ong: corolla-lobes 
white 6-8 mm. long: S a 3 mm. 
long, inflated, at the broadly rounded apex, mueh exceeding the M m 
n very broad, protruding horizontally : follicles 8-14 cm. long. [ Ascle clepias 
variegata L.]—Dry shaded grounds, in rather acid soil, various provinces, Fla. 
Tex., Ill, and Conn.—Spr.-sum 
8. OXYPTERYX Greene. Erect herbs with the habit of Acerates, the leaf- 
blades broad. Umbels mostly lateral. Calyx-lobes 5. Corolla rotate: lobes re- 
ne protruding from the slit ion 
s of the hood and curved upward 
near FA apex. Anther wings delto id, pro- 
truding between the hood-claws. Follieles 
erect, fusiform. Seed with a coma.—One 
species. 
1. O. Curtissii (A. Gray) Small. dn ied 
cumbent or onda , 5-7 dm. long, minutely 
pubescent, sometimes widely br TEM leaf-blades Nue elliptic to oval, 
varying to broadest above the middle or below it, 3-5 cm. long, glabrous or 
