692 Order 97.— ASOLBPIADACB^. 



liigb, simple or slightly branohod at top. Lvs. with the midreiu purple. Gel 

 smaU, green. Cor. dark purple, with reflexed segments. Crown pvirple, twice as 

 long as the autheridium, the points of its horns lying close upon it. JL 



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

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

 peduncles ; few-flowered; lioods of the crown acute, rather longer than the suberect 

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

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

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

 Hs. purple, the crown red. JToUicles ventricous-acuminate, smoothish. Jl, Aug. 

 (A. lanoifolia Mx. A. acuminata Ph.) 



5 A. ph5tolaccoides Ph. Poke-leaved Silkweed. St. simple, erect, pube- 

 rulent; lvs. broadly ovate, aiiemmted at base and apex, acute, smoothish both 

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

 about as long as the peduncle ; antheridium- stipitate ; hoods truncate, with 4 une- 

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

 grounds. Can. to &a. and Ark. St. i to 5f high. lvs. 6 to 9' by 2 to 4'. Umbels 

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

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

 June. 



6. A. variegata L. St. simple, erect, smoothish; lvs. ovate 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 ; -hoods 

 orbicular; horns broad-falcate, with the apex horizontal or suberect; foUides 

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

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

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



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

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

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

 (10 to lt)-flowered; petals ovate, reflexed, half as long as the pedicels; hoafy 

 ovate, longer than the falcate horns. — S. W. Ga. (Miss 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 nearly sfessile, few 

 (10 to 15-flowered; petals oval; hoods oblong-obtuse, yellowish white, longer than 

 ihe Jwrns. — Prairies and barrens, Wia (Lapham), 111., Min. Sts. If (more or less) 

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



9 A parvifldra Ph. Half-shrubby and branched at base; sts. ascending, smooth; 

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

 shorter than the leaves, few (12 to 18)-flowered; umbels small, pubescent, with 

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

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

 La. Sts. clustered, 18' 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 Ph. St. erect, simple, smooth ; lvs. smooth, thin, short-petio- 

 late, ovate, ^acuminate, some of them, in whorls of 4,; umbels few, lax, on long tei^ 

 minal or axillary peduncles; hoods eUyitic-ovate, with short, included boms. — An 

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

 with 1 or 2 hairy lines. Lvs. opposite, tho upper or middle paira near together 

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

 to 4' long. Hs. small, the petals pale pink, 2 to 3'' long, crown near 2", White 

 on flliform stalks with a pubescent line. Jl. 



/?. lanceol.\ta. Lvs. lanceolate, acummato at both ends, the upper whorled; 

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



11 A. obtusifdlia Mx. St. simple, erect ; lvs. oblong or oblong-ovate, obtuse, mu- 

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

 umbels terminal,' many-flowered, glabrous, long-pedunculate ; hoods abrupt, 



