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; follicles 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 acuminatum, 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, attenuated 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 17)-flowered; petals ovate, reflexed, half as long as the pedicels; hoods 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 sessile, few (10 to 15-flowered; petals oval; hoods oblong-obtuse, yellowish white, longer than the horns. - Prairies and barrens, Wis. (Lapham), Ill., Min. Sts. If (more or less) high. Lvs. 2 to 3' long. Cor. buds tinged with purple, about 2". Jn.
9 A parviflora 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 terminal or axillary peduncles; hoods elliptic-ovate, with short, included horns. - An elegant species in dry 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 so as to appear in 4s, 2 to 3' long, 1/2 as wide, acute or acuminate, on petioles 2 to 4" long. Fls. small, the petals pale pink, 2 to 3" long, crown near 2", white on filiform stalks with a pubescent line. Jl.
β. lanceolata. Lvs. lanceolate, acuminate at both ends, the upper whorled; fls. smaller (petals less than 2" long). - Mass. (Ricard). Ind. (Plummer).
11 A. obtusifolia Mx. St. simple, erect; lvs. oblong or oblorg-ovate, obtuse, mucronate, sessile, cordate and subamplexicaul, undulate, very smooth both sides; umbels terminal, many-flowered, glabrous, long-pedunculate; koods abrupt, 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 Torr. ex. descr.)
12 A. amplexicaulis Mx. St. simple, flexuous, often tortuous above, smooth; lvs. 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 ovale, including the acute, recurved horns. - Fields, copses, S. Car. to Fla. and Ala. St. clothed with large lvs., 1 to 2f high. Lvs. 2 1/2 to 5' long, two-third3 as wide, beautifully netted with pellucid veins, base 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 handsome 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. †
β. pulchra. St. and lvs. densely tomentous, the latter elliptic-lanceolate. - St 4 to 5d high. †
14 A. tuberosa L. Butterfly Weed. St. ascending, hairy, with spreading branches at top; lvs. alternate, oblong-lanceolate, sessile; umbels numerous, forming a large, terminal corymb; hoods bright orange, oblong, narrow, with slender, subfalcate, suberect horns. - Dry fields, Can. and U. S. Root large, fleshy, sending 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.
15 A. Michauxii 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, 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. longifolia Mx. in part. A. angustifolia Ell.) .
16 A. verticillata Ell. St. erect, simple, marked with pubescent lines; lvs. generally verticillate, 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