40 Engelmann and Gray, 
251. Bevuis inteEGRiroLia, Michx. A form with smaller 
heads and fewer rays than usual. Prairies. April — May. 
252. Sotmaco aneustirouia, Ell., Torr. & Gr.l.c. Wet 
prairies (and even on dry soil) and banks of rivulets, very 
remote from salt water. June — August. 
253. Isopaprus pivaricatus, Torr. & Gr. Fl. Il. p. 239. 
Light sandy soil. August — September. 
254. I. Hooxertanus, Torr. & Gr.l.c. Sandy prairies 
and on sandstone rocks on the Colorado. September. The 
specimens vary from six inches to two feet high; some are 
simple, others much branched from the base. The rigid 
leaves are narrowly spatulate-lanceolate ; the heads pretty 
numerous, on short erect peduncles. 
255. GrinpDELIA mnuLOIDES, Willd. Prairies west of San 
Felipe. July — August. Stem five to six feet high, branch- 
ing only above. 
256. Cauymmanpra canpipa, Torr. & Gr. 1. c. Open 
woods west of the Brazos. - April — May.’ | 
257. Sitpuium scaBerrimum, Ell. Woods near Industry. 
May — July. 
258. Hatea Lupovicrana, Tort. & Gr. Fl. Il. p. 304. 
Sandy post-oak woods, west of the Brazos. May — August. 
— Lowest leaves rhombic-ovate, or ovate-lanceolate, acute or 
acuminate, abruptly contracted into winged petioles, nearly 
as long as the blades, which are somewhat connate at the 
base. Exterior involucre with four rather strongly marked 
salient angles at the junction of the scales, whitish-tomentose 
inside. 
259. Heiianruus LenTIcuLARIS, Dougl. _Low woods and 
wet prairies. July— August. In rich bottom woods it often 
attains the height of ten or twelve feet, with the lower leaves 
six to eight inches broad. Flowers two anda half to three 
and a half inches in diameter ; achenia oval, thicker than is 
usual in the genus. 
1 PrerocAvuLon vircatum, DC. A few specimens of what appears to be this 
West Indian species, were gathered near Houston, in open pine woods. September. 
