Ordee 97.— %4.SCLEPIADACBA 593. 



cimost tnmccUe at apex, horns arcuate, falcate, inflexed. — ^In shady grounds, 

 prairies, Mid., W. and S. States. St 2 to 3f high, bearing a single (rarely 2) 

 terminal umbel of 30 to 40 large, reddish green or greenish flowers. Lvs. 4 to 5' 

 long, a third as wide, with a broad, rounded, mucronate apex. Petals 4" long. 

 Corona nearly white, its segments large, slightly 2-toothed. Jl. (A Meadii Torr. 

 ex. desor.) 



12 A. amplexicaitlis Mx. St. simple, flexuous, often tortuous above, smooth ; 

 hs. ovate, oUuae, not mucroTiate, cordate, closely eessile, glabrous and glaucous; 

 ped. lateral and terminal, many-flowered; petals ovate, reflexed, twice shorter 

 than the slender pedicels ; Iwods ovate, including the acute, recurved horns. — 

 Fields, copses, S. Car. to Pla. and Ala. St. clothed with large lvs., 1 to 2f high. 

 .Lvs. 2J to 6' long, two-thirds as wide, beautifully netted with peUuoid veins, base 

 lobes. largo, rounded. Petals 3" long, of a light dull purple. Apr.-^Jn. 



13 A. incamata L. St. tall, branching above ; lvs. opposite, lanceolate on short 

 petioles, slightly tomentous ; umbels numerous, erect, mostly terminal, often in 

 opposite pairs ; hoods ovate-oblong, with subfaloate, ascending horns. — A hand- 

 some species found in wet places. Can. and U. S. St. 3 to 4f high, with 2 hairy 

 lines. Lvs. 4 to 1' by 6 to 18", rather abrupt at base, tapering to a very acute 

 point, on petioles 6" long. Umbels close, 2 to 6 together at the top of the stem 

 or branches, each an inch or more in diam., 10 to 20-flowered. Cor. deep purple, 



' corona paler. Jl. f 



fi. PULOHRA. St. and lvs. densely tomentous, the latter elliptic-lanceolate.— 

 St. 4 to 5f high, t 



14 A. tuberosa L. Buttbrplt Weed. St. ascending, hairy, with spreading 

 branches at top ; lvs. alternate, oblong-lanceolate, sessile ; umbels numerous, form- 

 ing a large, terminal corymb ; ?wods bright orange, oblong, narrow, vrith slender, 

 subfaloate, Buberect horns. — Dry fields. Can. and IJ. S. Boot large, fleshy, send- 

 ing up numerous stems 2f high, leafy. Lvs. scattered, only the upper ones quite 

 sessile, acute or acuminate, obtuse at base, 2 to 4' by 6" to 1'. Corymb of nu- 

 merous, bright orange-colored flowers. Petals and crown of equal length (3 to 

 4"). Pods or follicles lanceolate-pointed, and like the other species containing 

 long, silky down. Aug. — Medicinal. 



ISA. Michiuzii Decaisne. Ascending, slender, puberulent ; lvs. scattered (the 

 lowest opposite), long-linear, sessile, mucronate; umbels terminal, solitary or 

 somewhat panicled; petals ovate, greenish white; hoods short, ovate, yeUovnsh, 

 including the short horns. — ^Wet pine barrens, S. Car. to Apalachioola, Fla., and to 

 La. St. 12 to 18' high. Lvs. 3 to 4' long, 1 to 3'' wide, rather numerous. Flower 

 buds greenish, scarce 2" long, sweet-scented. May, Jn. (A. longifolia Mx. in 

 part. A. angustifolia Ell.) 



16 A. verticillata EIL St. erect, simple, marked with pubesceui lines; lvs, 

 generally verticillate, very narrowly linear, revolute ; h/iods short, 2-toothed, horn 

 falcate, exserted. — A slender and dehoate species, 2f high, in swampa or moist 

 meadows. Can. and TJ. S. Lvs. in whorls of 4 to 6, 3 to 5' long, a line in width. 

 Fls. small, greenish white, in small, lateral umbels. Ped. half as long as the 

 leaves. JL 



17 A. paupercula Mx. St. virgate, erect, glabrous ; lvs. linear and linear-oblong, 

 margins narrowly revolute, both sides glabrous, tapering into a short petiole ; 

 ped. 1 or 2, at top of the stem, wmbel puberulent, few (6 to \0)-fk>wered ; fls. large; 

 petals oblong, half as long as the pedicels ; hoods ovate, dUated above, horas short, 

 includeli. — N. J. to Ga. and La., in wet woods. St. 3 to 4f high, very smooth. 

 Lvs. green on both sides, rough on the edges, mostly very narrow. Petals purple, 

 4" long. Crown stipitate, yellow. Jl., Aug. (A. lanceolata Walt) 



18 A. oinera Walt. Erect, virgate, smooth ; lvs. opposite, narrowly linear or fili- 

 form, acute, edges revolute ; ped. alternate at summit of the naked stem, very few 

 (3 to 6)-fiowered, bracteolale; petals ovate-oblong, thrice shorter than the pedicels; 

 hoods shorter than the stamens, including the horns. — Damp barrens, S. Car. to 

 Fla. Sts. very slender, 2 to 3f high. Lvs. 1 to 3' long. Petals 2 to 3' long, of 

 aa ashy and glaucous purple. Jn., JL 



19 A. curassavica L. Half-.shmbby and branched at base, puberulent ; st 

 terete ; lvs. linear-lanceolate and lanceolate, acuminate, petiolate ; umbels solitary, 



38 



