Asclepias. ASCLEPIADACE.E. 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 : 

 follicles fusiform and slender-acuminate, at length glabrous. Fl. i. 180; Decaisne in UC. 



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

 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 urnbel, 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 stiginatic 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. citri folia, Jacq. Coll. Ic. Rar. t. 343. A. liybrida, 

 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 tomehtose 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 exscrtcd at the upper interior angle : " follicles lan- 

 ceolate." - Sk. i. S20 ; Chapm. Fl. 363. A. accmtoidcs, M. A. Curtis in Am. Jour. Sci. ser. 2, 

 vii. 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 when old, obovate or oval and retuse 

 or the lower ovate, witli rounded or subcordate base, somewhat undulate, distinctly petioled, 

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

 of the greenish-white corolla oval, 5 lines 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 high as 

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

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

 Mex. Bound. 102. Colorado, on sand-banks of the Upper Canadian and Red Rivers 

 (Biyelow, Marc i/) 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,! to 4 feet high: leaves occasionally alternate, large (2 to" G inches 

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



A. Fremonti, 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 the 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, Neivberry, &c. Follicles when 

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

 preceding rather than of the following species. 



