Asclepias. ASCLEPIADACEiE. 93 



hoods white or pale, flesh-colored, broad and erect, rather shorter than the anthers trun- 

 cate horizontally, the truncate margin somewhat erose or toothed and with a slender tooth 

 at the inner angles, much surpassed by the erector slightly incurved slender-subulate horn • 

 lolUcles fusiform and slender-acummate, at length glabrous.— Fl. i. 180- Decaisne in DC 



1. c. A. Syriaca, var. exaltata, L. Spec. ed. 2, 313. A. nivea, Sims, Bot. Mag. t. 1181 not h 

 A. exaltata (acuminata), Muhl. Cat. 28. — Shaded and moist ground, New England to Wis- 

 consin and south to Georgia in the mountains. 



A. variegata, L. A foot or two high: leaves 3 to 7 pairs, thinnish (the middle ones 

 sometimes 4-nate), oval or ovate, or the upper oblong, obtuse at both ends, mucronate- 

 apiculate or short-acuminate, not rarely somewhat undulate, bright green and glabrous 

 above, pale and sometimes tomentulose beneath (at least when young), 3 to 6 inches long 

 conspicuously petioled : peduncles 1 to 3, terminal and subterminal, short equalling or 

 exceeding the very numerous pedicels of the compact umbel, both usually tomentulose • 

 flowers white with some pink or purple at the centre, i. e. on the distinct column and base 

 of the corolla: lobes of the latter ovate or oval, 3 lines long: hoods globular-ventricose 

 from a narrow base, spreading, overtopping the short anthers and stigmatic disk • the 

 semilunate subulate horn horizontally short-exserted : follicles fusiform and long-acuminate 

 —Spec. 215, & ed. 2, 312 (founded on syn. Dill. & Pluk.) ; Walt. Car. 104 ; Sims, Bot. Mag 

 t. 1182 ; Ell. 1. c. ; Decaisne, 1. c. (excl. syn. Hook.) ; Gray, Man. 1. c. ; Torr. Fl. N Y t 86 

 A. nivea, L. as to syn. Gronov. & herb. A. citrifolia, Jacq. Coll. & Ic. Rar. t. 343. A hybrida 

 Michx. 1. c — Dry shaded grounds, S. New York and Ohio to Florida, Arkansas and W 

 Louisiana. ' 



2. Tomentose or pubescent, South Atlantic States or New Mexican species: umbels all lateral 

 short-peduncled : flowers greenish: follicles tomentose or canescent. ' 



A. tomentosa, Ell. Tomentulose or merely soft-pubescent, sometimes minutely so ■ stems 

 a foot or sometimes a yard high, very leafy above : leaves from oval-obovate to oblong-lan- 

 ceolate obtuse or short-acuminate at both ends, 2 to 4 inches long, rather conspicuously 

 petioled : umbels 3 to .10 in alternate axils, very short-peduncled, loosely many-flowered • 

 lobes of the corolla ovate, 3 or 4 lines long: column very short: hoods oval-obovate 

 obliquely truncate, decidedly shorter than the broadly-winged anthers; the broadly subu- 

 late horn ascending and moderately exserted at the upper interior angle • " follicles lan- 

 ceolate." - Sk. i. 320 ; Chapm. Fl. 363. A. acerafoides, M. A. Curtis in Am. Jour. Sci. ser. 2 

 vu. 407. — Dry sandy barrens, N. Carolina to Florida. 



A. arenaria, Torr. Lanuginous-tomentose, in age glabrate : stems about a foot high 

 stout, ascending, thickly leaved : leaves coriaceous wlien old, obovate or oval and retuse 

 or the lower ovate, with rounded or subcordatebase, somewhat undulate, distinctly petioled 

 2 to 4 inches long : umbels rather densely many-flowered, shorter than the leaves : lobes 

 of the greenish-white corolla oval, 5 linos long : column nearly half the length of the 

 anthers : hoods about as broad as high, surpassing the anthers, truncate at base and sum- 

 mit, the latter oblique and notched on each side near the inner angle, which forms an 

 obtuse tooth ; horn with included ascending portion or crest broadly semilunate as higli as 

 the hood ; the abruptly incurved apex subulate-beaked, horizontally exserted, or the slender 

 termination ascending: follicles oblong-ovate and long-acuminate, tomentulose. —Bot. 

 Mcx. Bound. 162. — Colorado, on sand-banks of the Upper Canadian and Red Rivers 

 (Bigelow, Marcy) to New Mexico, Wislizenus, &c. —Allied to A. Jamesii. 



3. Floccose-lanuginous or tomentose-canescent, Western species; the dense wool not rarely decidu- 

 ous with age: stems stout, 1 to 4 feet high: leaves occasionally alternate, large ^2 to 6 inches 

 long): umbels terminal and lateral, many-flowered: follicles (where known) ovate. 

 A. Premonti, Torr. Canescently tomentose with short and fine wool, or the stem (a 

 foot or less high) puberulent: leaves oval or oblong, obtuse, retuse, or apiculate-acute, 

 often subcordate, smooth-edged, distinctly petioled : umbels 1 or 2, on peduncles not longer 

 than the lanuginous pedicels: lobes of the whitish corolla oblong-ovate, 3 lines long: 

 column very short : hoods nearly erect, equalling the anthers, somewhat evenly truncate 

 and tlie inner angles produced into an acute or obtusish tooth, with no notch behind it ; 

 the subulate apex of the broad horn inflexed and a little exserted. — Pacif. R. Rep. vi. 87, 

 name only. — California, on the Upper Sacramento, Fremont, Newberry, «&c. Follicles when 

 young densely canescent-tomentose, in age glabrate. Herbage with the pubescence of the 

 preceding rather than of the following species. 



