Asclepias. ASCLEPIADACE^. 93 



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

 cate horizontally, the truncate margin somewliat erose or tootlied and witli a slender tooth 

 at the inner angles, much surpassed by tlio erect or slightly incurved slender-subulate horn : 

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

 I.e. A. Syrlaca, var. exalUtta, L. Spec. ed. 2, 'SVS. 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 tiie 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 antliers 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. citrifhlia, Jacq. Coll. & Ic. Ear. t. 343. A. hijbrida, 

 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 : riowers gi-eenish : 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-flowei-ed : 

 lobes of the corolla ovate, 3 or 4 lines long : colunm 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. .303. A. acerntoides, 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, with rounded or subcordate base, 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 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, horizontall}' exserted, or the slender 

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

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

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



3. rioccose-lanuginous or tomentose-canescent, Western species ; the dense wool liot rarely decidu- 

 ous with age: stems stout, 1 to 4 feet liigh : leaves occasionally alternate, large 1 2 to G inches 

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



A. Premonti, Torr. Canoscently 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, Newherrij, &c. Follicles when 

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

 preceding rather than of the following species. 



