348 ASCLEPIADACEJE. (MILKWEED FAMILY.) 



1. A. viridiflora, Ell. Pubescent; stem stout, simple ; leaves from oval 

 or obovate to lanceolate, undulate ; umbels lateral and terminal, iiearlv ses- 

 sile, densely many-flowered ; flowers small, greenish ; leaves of the crown 

 oblong, erect, as long as the sessile gyiiostegium. Dry sterile soil. June- 

 jul v. Stem 1 - 1 i high. Leaves !' - 2' long. 



2. A. longifolia, Ell. Pubescent ; stem terete ; leaves linear and linear- 

 lanceolate ; umbels sleuder-peduncled, many-flowered ; flowers small, pale 

 purple ; leaves of the crown deep purple, oval, shorter than the gyuostegium, 

 and aduate to its stalk ; follicle lanceolate, tomeutose. Low pine barrens. 

 July. Stem 1 - 1 high. Leaves 3' - 6' long. Corolla 4" wide. 



3. PODOSTIGMA, Ell. 



Calyx 5-parted. Corolla 5-parted, with the lobes erect. Leaves of the 

 crown destitute of a horn, ascending, incurved-beaked at the apex, united 

 with the base of the long and slender gynostegium. Stigma small, depressed. 

 Seeds comose. A low pubescent simple-stemmed perennial herb, with op- 

 posite lanceolate sessile leaves, and few-flowered umbels on lateral peduncles. 



1. P. pubescens, Ell. Low pine barrens, Florida to North Carolina. 

 June -Oct. Root tuberous. Stem 6' -12' high. Leaves erect, 1'- 2' long. 

 Umbels oi 4- 6 orange-colored flowers. Corolla 4" -5" long, the oblong lobes 

 wavy on the margins. Follicles linear-lanceolate, tomentose, 4'- 6' long. Seeds 

 oval, winged. 



4. ANANTHERIX, Nutt. 



Leaves of the crown longer than the corolla, obloug-clavate, obtuse, arching 

 over the sessile gvnostegium, slightly crested. Anther-wings not thickened. 

 Pollen-mass oblong, half the length of the very slender stalk. Otherwise 

 like Asclepias. 



1. A. connivens, Gray. Stem stout, simple, pubescent above; leaves 

 oblong or oblong-ohovate, the upper smaller and lanceolate ; umbels 3-6, 

 6-9-flowered, pubescent; flowers large, greenish; leaves of the crown twice 

 as long as the gyiiostegium. Wet pine barrens, Florida and Georgia. June - 

 July. Stem l-2 high. Leaves l'-2' long. Corolla 8"- 10" wide. 



5. ASCLEPIODORA, Gray. 



Calyx 5-parted. Corolla rotate. Leaves of the crown spreading, longi- 

 tudinally crested within. Anthers with thickened margins, membranous at 

 the summit. Gvnostegium sessile. Pollen-grains pear-shaped, longer than 

 the stalk. 



* Crown leaves arcuate-spreading, crested above the middle, incurved at the point : 



anthers rounded at the base, as long as the gynostegium. 



1. A. viridis, Gray. Closely pubescent; stem angular, often branching; 

 leaves alternate, oblong, short-petioled ; umbels corymbose, often compound ; 

 corolla large, greenish ; leaves of the crown oblong, shorter than the nearly 

 sessile gvnostegium. Dry soil, Florida to South Carolina. July. Stem 

 1- lg high, leafy to the summit. Leaves 3' -4' long. Corolla 1' wide. 



