g92 Order 97.— ASCLEPIADACE..E. 



liigli, simplo or slightly branched at top. Lvs. with tho midvein purple. CaL 

 small, green. Cor. dark purple, with reflexed segments. Crown purple, twico as 

 long as the antheridium, the points of its horns lying closo upon it. Jl. 



4 A. rubra L. St. simple, erect; lvs. ovate-acuminate, very acute, subcoraate or 

 rounded at base, on very short petioles, glabrous ; umbels on long, mostly terminal 

 peduncles ; few-flowered; hoods of the crown acute, rather longer than the subereci 

 horn. — A small and elegant species in Penn., N. J., and Car., not common. St 

 1 to 2f high, with a pubescent line on one side. Lvs. 3 to 5' by 1 to 2', in remote 

 pairs, the upper sometimes alternate. Ped. 1 to 5, 2 to 3' long, pedicels about 1'. 

 Pis. purple, tho crown red. Follicles ventricous-acuminate, smoothish. Jl., Aug. 

 (A. lancifolia Mx. A. acuminata Ph.) 



5 A. phj tolaccoides Ph. Poke-leaved Silkweed. St simple, erect, pubc- 

 rulent; lvs. broadly ovate, attenuated ai base and apex, acute, smoothish both 

 sides, glaucous; ped. whitish puberulent, many-flowered; pedicels slender, loose, 

 about as long as tho peduncle; antheridium stipitato; hoods truncate, with 4 une- 

 qual teeth; horns subulate, exserted, subercct. — Tall and handsome, in low, shady 

 grounds, Can. to Ga. and Ark. St. 4 to 5f high. Lvs. G to 9' by 2 to 4'. Umbels 

 near the top on lateral peduncles 4 to 6' long, with about 20 large flowers o:: 

 nodding pedicels near 2' long. Petals greenish, crown white, tinged with pink. 

 June. 



6. A. variegata L. St. simple, erect, smoothish; lvs. ovato or oval, abrupt at 

 each end, mucronate, glabrous, glaucous beneath; ped. lateral or terminal, one- 

 third as long as the leaves, umbellate, many-flowered ; cor. segm. ovate ; hoode 

 orbicular; horns broad-falcate, with tho apex horizontal or subercct; lbliicles 

 oblong, with a long, slender point, minutely puberulent. — Woods, X. J. to Fla. 

 ,at Tallahassee) and Wis. St. 2 to 4f high. Lvs. with a slight acuminatum, at 

 length slightly undulate. Umbels about 2, 20 to 30-ilowered. Cor. white. 



7 A. nivea L. St. terete, pubescent; lis. lanceolate or oblong-lanceolate, acute, 

 Attenuated at base into a long petiole, minutely puberulent, scarcely paler beneath; 

 ped. shorter than the Paves, mostly terminal, often compound ; umbels small, few 

 (10 to 17)-flo\vcred; petals ovate, reflexed, half as long as the pedicels; hoods 

 ovate, longer than tho falcato horns. — S. W. Ga. (Mis3 Keen) to La. A pretty, 

 white-flowered species 1 to 2f high. Lvs. 3 to 4' long, petioles near 1'. Flower 

 buds 2" long. Jn. — Aug. 



8 A Vaseyi Torr. & Gr. St. low, pubescent; lvs. ovate or oblong-lanceolate, acute, 

 abruptly contracted to short petioles, pubescent beneath ; umbels Dearly sessile, few 

 {10 to 15-flowered; petals oval; hoods oblong-obtuse, yellowish white, lunger than 

 the lioms. — Prairies and barrens, "Wis. (Lapham), 111., Min. Sts. If (more or less) 

 high. Lvs. 2 to 3' long. Cor. buds tinged with purple, about 2". Jn. 



A. parvificra Ph. Half-shrubby and branched at baso; sts. ascending, smooth; 

 lvs. lanceolate, attenuate at base and apex, on long petioles, smooth, thin; ped. much 

 shorter than the leaves, few (12 to 1 8)-fiowered ; umbels small, pubescent, with 

 small flowers; petals ovate, thin, thrice shorter than tho pedicels: hoods ovate, 

 shorter than the filiform horns. — "Woods along rivers, Ind. (Green Co.) to Ga. and 

 La. Sts. clustered, IS' to 3f high, very leafy. Lvs. 4 to 6' (including the 1' 

 petiole) by 1' to 18". Umbels several, 1' diam. Cor. purplish white, bud 1" 

 long. JL, Aug. 



10 A. quadrifolia Th. Ft. erect, simple, smooth; lvs. smooth, thin, short-petio- 

 late, ovate, acuminate, tome of than in wltorls of 4; umbels few, lax, on long ter- 

 minal or axillary peduncles; hoods elliptic-ovate, with short, included horns. — An 

 elegant species in drj' woods. Can. and U. S. St. about 2f high, slender, often 

 with 1 or 2 hairy lines. Lvs. opposite, the upper or middle pairs near together 

 bo as to appear in 4s, 2 to 3' long, I as wide, acute or acuminate, on petioles 2 

 to 4' long. Fls. small, tho petals palo pink, 2 to 3'' long, crown near 2", white 

 on filiform stalks with a pubescent line. Jl. 



(i. lancijolata. Lvs. lanceolate, acuminate at both ends, the upper whorled; 

 fls. smaller (petals less than 2" long). — Mass. (Ricard). Ind. (Hummer). 



11 A. obtusifclia Mx. St. Eimple, erect ; lvs. oblong cr oblong-ovate, obtuse, mu- 

 cronate, sessile, cordate and subainplexicaul, undulate, very smooth both sides; 

 umbels terminal, mauy-flowcrcd, glabrous, long-pedunculate ; hoods abrupt. 



