Order 97.— ASCLEPIADACE^E. 593 



almost truncate at apex, horns arcuate, falcate, inflexcd. — 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, mucronato apex. Petals 4" long. 

 Corona nearly white, its segments largo, slightly 2-toothcd. Jl. (A Meadii Torr. 

 ex. descr.) 



12 A. amplesicauli3 Mx. St. simple, flexuous, often tortuous above, smooth ; 

 lvs. ovate, obtuse, not mucronate, cordate, closely sessile, glabrois and glaucous; 

 pcd. 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 lvs., 1 to 2f high. 

 Lvs. 2}j to 5' long, two-thirds as wide, beautifully netted with pellucid reins, baso 

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



13 A. incarnata 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 subfalcate, ascending horns. — A hand- 

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

 lines. Lvs. 4 to 7' by G to 18", rather abrupt at base, tapering to a very acuto 

 point, on petioles G" long. Umbels close, 2 to G together at the top of t'.io stem 

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

 corona! paler. Jl. \ 



p. PULCHRA. St. and lvs. denselv tomentous, the latter elliptic-lanceolate. — 

 St. 4 to 5f high, f 



14 A. tubercsa L. Butterfly Weed. St. ascending, hairy, with spreading 

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

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

 subfalcate, eubereet horns. — Dry fields, Can. and TJ. S. Root large, fleshy, send- 

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

 sessile, acute or acuminate, obtuse at base, 2 to 4' by G" 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. 



15 A. Michauzii Dccaisne. Ascending, slender, pubcrulent ; lvs. scattered (the 

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

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

 including the short horns. — Wet pine barrens, S. Car. to Apalachicola, 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. longilblia Mx. in 

 part. A. angustifolia Ell.) 



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

 generally verticiilate, very narrowly linear, revoluto ; hoods short, 2-ioothed, horn 

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

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

 Fls. small, greenish white, in small, lateral umbels. Ped. half a3 long as the 



. leaves. Jl. 



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

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

 ped. 1 or 2 at Up of the stem, vmbt I jmberulenl, few (G to I0)-flowered ; fls. latge; 

 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 ou the edges, mostly very narrow. Petals purple, 

 4" long. Crown stipitate, yellow. JL, Aug. (A. lanctolata Walt ) 



18 A. cinera Walt. Erect, virgate, smooth : lvs. opposite, narrov.lg linear or fUi' 

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

 (3 to 6j-flowered, bracteolate ; petah 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 liigh. 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, puberulc!;t ; rt. 

 terete; lvs. Lntar-lanceolate and lanceolate, acuminate, petiolato; vmlcis solUary, 



38 



