ORDER 97. ASCLEPIADACE^E. 593 



almost truncate 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 Torn 

 ex. descr.) 



12 A. amplexicaulis MX. St. simple, flexuous, often tortuous above, smooth ; 

 Ivs. ovate, obtuse, not mucronate, cordate, closely sessile, glabrous and glaucous ; 

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

 than the slender pedicels ; hoods ovate, including the acute, recurved horns.* 

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

 Lvs. 2J- to 5 long, two-thirds as wide, beautifully netted with pellucid veins, basa 

 lobes large, rounded. Petals 3" long, of a light dull purple. ' Apr. Jn. 



13 A. incarnata L. St. tall, branching above ; Ivs. opposite, lanceolate on short 

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

 opposite pairs ; hoods ovate-oblong, with subfalcate, 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 7' 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 



/?. PULCHRA. St. and Ivs. densely tomentous, the latter elliptic-lanceolate. 

 St. 4 to 5f high, f 



14 A. tuberosa L. BUTTERFLY WEED. St. ascending, hairy, with spreading 

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

 ing a large, terminal corymb ; floods bright orange, oblong, narrow, with slender, 

 subfalcate, suberect horns. Dry fields, Can. and II. S. Root 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 nir- 

 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. 



15 A. Michauxii Decaisne. Ascending, slender, puberulent; Ivs. scattered (tho 

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

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

 including the short horns. Wet pine barrens, S. Car. to Apalachicola, Fla., and t<j 

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

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

 part. A. angustifolia Ell.) 



16 A. verticillata Ell. St. erect, simple, marked with pubescent lines; Ivs. 

 generally ver tic illate, very narrowly linear, revolute; hoods short, 2-toothed, horn 

 falcate, exserted. A slender and delicate species, 2f high, in swamps or moist 

 meadows, Can. and U. 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 tho 

 leaves. Jl. 



17 A. paupercula MX. St. virgate, erect, glabrous; Ivs. linear and linear-oblong, 

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

 ped. 1 or 2 at tap of the stem-, umbel puberulent, few (6 to I0)-ftowered ; fts. large; 

 petals oblong, half as long as the pedicels; hoods ovate, dilated above, horns short, 

 included. 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. cinera Walt. Erect, virgate, smooth ; Ivs. opposite, narrowly linear or fili- 

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

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

 hoods shm-ter than the stamens, including the horns. Damp barren?, S. Car. to 

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

 an ashy and glaucous purple. Jn., Jl. 



19 A. curassavica L. Half-shrubby and branched at base, puberulent ; rt. 

 terete; fr. linear-lanceolate and lanceolate, acuminate, pctiobto; umbek solitary, 

 38 



