Thistle Family-. 8'J 



downy beneath; scales ovate-lanceolate, acuminate or attenuate' and spread- 

 ing, ciliate. Borders ot %voods, August-September; common. The variety 

 mollis T. & Vr., ha& the leaves finely and densely caneseent beneath and is 

 reported from Story county. ( H. ntru.lin.min luiwrnpliitllus ( Willd. ) Liritton'). 

 f! $ Slum aeitlirotui, hixjtitl, nr hirsute. 



rj. hirsutus Raf. Stem 2-i feet high. Iiirsute; leaves petiolate, ovate-lan- 

 ceolate, base abrupt or roundish, acuminate, more or less serrate, very rough 

 above, usually rough-hairy beneath; scales ovate-lanceolate, acuminate. 

 Often confounded with the preceding; August- Sepcember; frequent: Fay- 

 ette, Van Buren. Decatur, and Ringgold counties; reported from Scott, .Musca- 

 tine, .Johnson, and Lee counties. 



H. laetiflorus Hers. Stem 3-~> feet high, branched above, scabrous or his- 

 pid; leaves oval or oblong-lanceolate, acuminate both - ways, more or less 

 serrate, rough on both sides, thinner than the preceding; heads rather slioit- 

 peduncled; scales in :i or 3 hows, ovate to oblong-lanceolate,- acuminate; rays 

 numerous; disk yellow. Prairies; August-September; infrequent; Jackson. 

 Muscatine, and Johnson counties: reported from Fayetle and Story counties. 



h|. tuberosus L. Jcrnxixlcm Artichoke. Stem branching above, 4-1 feet 

 high, pubescent or hirsute: leaves of the branches and upper part of the stem 

 usually alternate, all oblong-lanceolate to ovale or subcordate. petioled, acu- 

 minate, coarsely serrate, scabrous above, shortly pubescent or cinereous 

 beneath; scales lanceolate, attenuate. The variety subcaxi -sckns Uray, has 

 the leaves densely white caneseent beneath and is found in Fayette county. 

 Moist soil: September; frequent:, Winneshiek, Floyd. Henry. Van Buren. 

 Decatur. Dickinson, and Winnebago counties: reported from Fayette, Musca- 

 tine. Lee. Story. Boone. Emmet. Cass, Woodbury, and Sioux counties. 



ACTINOMERIS Nutt. Perennials, with simple or somewhat branched 

 stems, and feather-veined deeurrent leaves. Heads coryinbed, many-rloweied: 

 ravs yellow, few, neutral. Involucral scales foliaceous, nearly equal. Re- 

 ceptacle chaffy. 



A. squarrosci Nutt. Stem 4-il feet high, winged; leaves alternate or lower 

 opposite, oblong or ovate-lanceolate, tapering both ways, more or less serrate; 

 ravs '--*• irregular: achenes flat, obovate. broadly winged; pappus of :!-'■! 

 awns. Low woods; July-Au gr.st: frequent in the eastern, southeastern, 

 southern, and central counties: Johnson, Appanoose, Decatur, Ringgold, 

 1'a.ge, and Fremont counties; reported from Scott. Muscatine, Des Moints, 

 Henry, and Story counties. ( I'trliesiuii tiltcniifalUi (L ) liritton). 



COREOPSIS L. Tickseh). Annual, or perennial herbs, with opposite 

 leaves, and mostly yellow flowers. Involucre double, of about S scales to 

 each part, outer foliaceous, more or less spreading, inner somewhat mem- 

 branous, appressed. Receptacle flat, with deciduous chaff. Pappus commonly 

 of 2 teeth or awns, barbed upwardly, sometimes wanting. Achenes flattened 

 parallel with the involucral scales. 



C. palmata Nutt. Perennial; stem l-:t feet high, simple, rigid, glabrous; 

 leaves sessile, rigid, 3-nerved at the base, cuneiform in outline. 3-cleft to or 

 below the middle, rarely undivided; divisions linear, slightly narrower than 

 the base, entire or 1-3 cleft; outer scales linear, equaling the inner, more or 

 less united at the base. Prairies; June-July; common throughout the state. 



C. tripteris L. Stem simple. 4-8 feet high, or corymbed above, smooth: 

 leaves petioled, 3-."i-divided. leaflets lanceolate, tapering both ways, entire; 

 outer scales shorter, all united at the base. Woods; August-September: in- 



