KIK ASCLEPIADACEAE. 



lanceolate, pointed, short-petioled, base obscurely heart-shaped; flowers 



small, rose purple. Wet places; July-September; common. 



* * * Leaven opposite or verticillate ; corolla white, greenish, yellowish or purplish. 



f Leaves vnri/imj from ovate or ohlontj to ohovatc or orbicular. 



X Leaves short-petioled or sessile, clasping; plants mostly glabrous. 



A. sullivantii Englm. Tall, smooth; leaves ovate-oblong or oblong', base 

 somewhat heart-shaped, nearly sessile, smooth on both sides; hoods obovate; 

 follicles spicy on' or toward the beak. Moist soil; July-August; frequent; 

 Emmet, Muscatine. Jefferson. Appanoose, Decatur. Taylor, Page, Calhoun, 

 Hancock, Cerro Gordo, and Shelby counties: reported from Fayette and Story 

 counties. 



A. obtusifolia Mx, Stem 2-3 .feet high, smooth; leaves opposite, sessile, 

 transversely veined, waxy, oblong to oblong-ovate, mucronate, sessile, sub- 

 cordate; umbel on a long naked peduncle: flowers reddish green. Fields; 

 May-September; infrequent; Johnson, Linn, Union, Adams. Montgomery, 

 and Shelby counties. 



A. meadii Torr. Stern simple. 1-2 feet high, smooth; leaves sessile, ovate 

 or oblong-ovate, pointed or obtuse; peduncle about twice the length of the 

 leaves; pedicels about an inch long; flowers greenish white. Pry soil: May- 

 June; rare; Decatur and Adams counties. 



X \ Leaves petloled; plants glabrous 



A. phytolaccoides Pursh. Poke M. Stem 3-5 feet high, simple, smooth; 

 leaves broadly ovate, tapering both ways, petioled, opposite, mostly smooth 

 beneath; umbels several, axillary; peduncles 2-3 inches long; pedicels almost 

 us long, very slender, drooping; flowers 10-20 in an umbel, greenish; hoods 

 truncate, white, horns exserted. Woods, thickets; June-July: infrequent 

 Winneshiek and Johnson counties; reported from Fayette. Scott, and Musca- 

 tine counties. (A. exaltatti (L.) Muhl.) 



A. quadrifolia Jacq. Stem 1-2 feet high, slender, sirrple; leaves ovate to 

 lanceolate, thin, somewhat pubescent on the veins beneath, acute or acumi- 

 nate, petioled, the upper and lower opposite, the middle verticillate in 4's: 

 corolla, pink or whitish; hoods white; follicles erect, glabrous. Woods; May- 

 July; infrequent; Muscatine, Johnson, Henry, and Lee counties. 

 XXX T lie lower surfaces of the leaves ami often the whole plant eat.esccnt or loir.cn- 



tosc. 

 \ Fnlllelcs ivi.th soft spinose jtrocusses. torncntose. 



A. cornuti Decaisne. Common M. Stem 2-4 feet high, short-pubescent: 

 leaves short-petioled, oval or oblong-, large, downy beneath, longer than the 

 umb-els: flowers varying from dull purple to white: follicles spiny, tomentose. 

 Fields and waste places; June-July: common. (A. stjriaca L.) 



A. spsciosa Torr. Whole plant white-tomentose or eanescent or glabrate 

 below; stem 1-3 feet high, simple; leaves broadly ovate or oval, obtuse and 

 cuspidate or acute at the apex, base subcordate, rounded or narrowed, 

 petioled; corolla purple-green; hoods elongated, lanceolate, with 2 blunt 

 teeth below; horns short, inflexed; follicles erect or spreading, densely woolly, 

 covered with soft spinose processes, Moist soil; May-July; in'reqnent: 

 Emmet and Hancock counties. 



\ 'i Follicles with, no spinose processes, glabrous or pubescent. 



A. otfalifolia Decaisne. Stem 1-2 feet high, downy; leaves ovate, acutish. 

 short-petioled; peduncle very short, pedicels longer; hoods yellow, horns in- 

 cluded; corolla-lobes greenish white tinged with purple. Prairies; June- 



