Accra:es. ASCLEPIADACE.E. 99 



crest to the hoods, and by the wings of the anthers not angulato nor dilated (but 

 rather tapering) at base. — Ell. Sk. i. olG (1817) ; Engelm. inss. ; Gray, Proc. 

 Am. Acad. 1. c. Poli/ofus, Nutt. in Trans. Amer. Phil. Soc. 1. c. Gonrplwcarpua 

 in part, Benth. & Hook. Gen. ii. 754. 



* Mass of anthers ami stii^nuv globular, not equalled by the hoods: column below the hoods evi- 

 dent: leaves mainly alternate-scattered, very numerous. 



A. auriculata, Engelm. Glabrous up to the iiiflorcscenco : stoui 2 or 3 feot liigli, 

 slender: leaves linear-iiliforui (i to inches long, a third to a line and a half wide), their 

 scabrous margins not revolute : umbels several, lateral : pedicels short : column below the 

 hoods very short : hoods oval or quadrate, emarginately or sometimes 3-crenately truncate, 

 the involute margins at base appendaged with a pair of remarkably large and broad 

 auricles : anther-wings narrow and of equal breadth from top to bottom : i)olliaia elongated- 

 oblong, not tapering upward. — Engelm. in Bot. Mcx. Bound. IGO. — Prairies and rocky 

 ground, from S. Texas and New Mexico to Colorado. Unless the characters are noted, 

 very likely to be confounded with Asdr.pias [Nothaceratcs) stenophjlla. 



A. longif olia, BU. Minutely hirsutely scabrous-pubescent, or smoothisli : stems 1 to 3 

 feet high, erect or ascending : leaves from linear to elongated-lanceolate (3 to 8 inches long, 

 1 to () lines wide) : umbels few or numerous, terminal and lateral : pedicels slender : column 

 rather conspicuous below the hoods : these purple or purplish, oval, obtuse, entire, unap- 

 pendagod, adnate by tlie ventral margins to the whole upper half of the column, therefore 

 pitcher like, rising barely to the middle of the anthers : anther-wings semi-rhombic, more 

 attenuate to base: poUinia (as generally in the genus) with tapering apex. — Sk. i. 317; 

 Decaisne in DC. Prodr. viii. 522. Asdepias loii;/ifoli(i, Michx. Fl. i. IIG, mainly. A. Flori- 

 dana. Lam. Diet. i. 284. A. incnrnata, Walt. Car. lOG, not L. Polijotus loiir/i/olius, Nutt. in 

 Trans. Am. Phil. Soc. v. 522. — Moist prairies and pine-barrens, Florida to Texas, and 

 north to Ohio and Wisconsin. Varies greatly in height, length of peduncles, foliage, &c. : 

 a Florida form has few or single slender-peduncle I umbels, and smaller flowers. 



* * Mass of anthers and stigma longer than broad, almost equalled by the hoods, the short inser- 

 tion of which covers the very shortcwlunin: leaves not rarely opposite, mostly broader. 



A. viridiflora, Ell. Tomentosc-puberulent, becoming glabrate, or the foliage somewhat 

 scabrous : stem a foot or two high : leaves oval or oblong and obtuse or retuse (one or two 

 inches long), or sometimes narrower and longer and also acute, commonly mucronate, occa- 

 sionally undulate : umbels 2 to 5 or sometimes solitary, mostly lateral and subsessile, dense : 

 pedicels little over double the length of the reflexed narrowly oblong lobes of the greenish 

 corolla : hoods somewhat fleshy, lanceolate-oblong, with sm;ill auricles at base much in- 

 volute and concealed, otherwise entire, alternated by as many short and roundish or gland- 

 like small internal teeth : anther-wings semi-rhomboid above, with a much longer tapering 

 haso.— Asdepias viridi/lora, llaf. in Med. Rep. xi. 360, & Dcsv. Jour. Bot. i. 227 ; Pursh, 

 Fl. i. 181; Torn Fl. 284 (excl. var.o/joy«to) ; Hook. Fl.ii. 53, t. 143. Polijotus heterophijllus, 

 N,jtf I (. _ i^ry sterile soil. New England and Canada to Saskatchewan, and south to 

 Florida and Texas. Runs into 



Var. lanceolata, with lanceolate leaves 2^ to 4 inches long. — Asdepias lanrroiata, 

 Ives in Amer. Jour. Sci. iv. 252, with plate. A. riridifinra, var. lann-olafa, Torr. 1. c. ; Hook. 

 1. cdextral figure. With the broader-leaved form. 



Var. linearis, with elongated linear leaves and low stems : umbels often solitary. — 

 Winnipeg Valley to New Mexico. 



A. lanuginosa, Decaisne. Hirsute rather than woolly : stems a span or two high, 

 terminated by a single pedunculate umbel : leaves frequently alternate or scattered, from 

 oblong-ovate to lanceolate (1 to 3 inches long), with roundish base: pedicels 3 or 4 times 

 the length of the oblong lobes of the greenish corolla : hoods purplish, broadly oblong, 

 obtuse and entire, involute auricles at base obscure if any ; the alternating internal teeth 

 or lobes small and emarginate ; anther-wings broadest and obtusely angulalc below the 

 middle (approaching those of Asdepias): fruit not seen. — Cray, Man. ed. 3, & cd. 5. 

 A. monocephaJa, Lapham in Gray, Man. ed. 2, addend. Asdepias laim;jinosa,'Sutt. Gen. i. 168. 

 A. Nuttnlliana, Torr. in Ann. Lye. N. Y. ii. 218. Pdi/ntns lanufjinosus, Nutt. in Trans. Am. 

 Phil. Soc. 1. c. —Prairies, Wisconsin and N. Illinois, fyipham, Vaseij, &c., to tlie Mis.souri at 

 White River, Nuttall, and the Yellowstone, Mr. Allen. 



