Spring Flora of Oklahoma 
137 
Leaves thick, broadly ovate, or oval, 3'-8' long, 2'-4' wide. Umbels 
several or, rarely, solitary, many-flowered. Corolla purple-green. 
Hood lanceolate, with two blunt teeth below. Horn short, indexed. 
Follicles erect or spreading on the recurved pedicels, 3'-4' long, dense¬ 
ly woolly and covered with soft, spinose processes. 
In moist soil. May-July. Oklahoma, Kingfisher and Blaine 
counties. 
3. Asclepias verticillata L. Wiiorled Milkweed. Stem pubes¬ 
cent in lines above, leafy, 12'-30' tall. Leaves narrowly linear, ses¬ 
sile, verticillate, in 3’s-7’s or some of them alternate, their margins 
revolute. Umbels numerous, many-flowered. Corolla greenish white. 
Hood white, oval, entire, much shorter than the subulate incurved 
horn. Follicles erect on the erect, fruiting pedicels, narrowly spindle- 
shaped, glabrous, 2'-3' long. 
In dry fields and on hills. May-September. Frequent. 
4. Asclepias galioides H. B. K. Bedstraw Milkweed. Stem 
erect, 12' high or more. Leaves erect or spreading, in whorls of 2-6, 
narrowly linear, its margins revolute. Umbels 9"-13" in diameter. 
Flowers greenish-white. Hoods as high as the anthers, dorsally 
hastate-sagittate, entire. Horn arising from the base of the hood. 
Follicles erect on erect, fruiting pedicels, attenuate, 2'-2%' long. 
Prairies. May-July. 
II. ASCLEPIOORA A. Gray 
Low and stout perennial herbs, often decumbent. Flow¬ 
ers large. Corolla-lobes ovate, greenish, ascending or 
spreading. Follicles ovoid, often somewhat muricate, with 
soft, spinous projections. Hoods destitute of a horn. Other¬ 
wise resembling Asclepias. 
Glabrous or nearly so; leaves oblong to ovate-lanceolate; 
umbels corymbose. 1. A. viridis. 
Stem rough-puberulent; leaves lanceolate or linear, 
acuminate; umbels solitary. 2. A. decumbens. 
1. Asclepiodora viridis (Walt.) A. Gray. Oblong-leaved 
Milkweed. Stem erect, nearly smooth, 12'-24' high. Leaves alter¬ 
nate, short-petioled, oblong to ovate-lanceolate. Umbels 2-4. Flow¬ 
ers about 1' in diameter, green with a purplish crown. Follicle as¬ 
cending, puberulent, 2'-3' long. 
In dry soil. May-July. Common. 
2. Asclepiodora decumbens (Nutt.) A. Gray. Decumbent Milk¬ 
weed. Stems decumbent or ascending, 10'-24' long. Leaves linear 
to lanceolate. Umbel solitary, many flowered. Corolla greenish. 
