OF ARTS AND SCIENCES. 259 



32. E. HiRTiFLORUM, Gray in herb. Somewhat glandular-puberu- 

 lent, 6 inches high or less : bracts oblong, hispid : involucres half a 

 line long or less, on erect or nodding pedicels 1 to 3 lines long, or 

 sessile in the forks, 3-o-flowered : flowers very hirsute, reddish, half a 

 line long or less : akenes slightly exserted. — Collected by Dr. Gray, 

 1872, probably in the mountains of California. 



§ 2. Involucres campanulate or short-turbinate, not angled or nerved, with 5 

 rounded erect teeth, pedunculate in diffuse repeatedly di- or trichotomous pan- 

 icles : bracts not foliaceous, all ternate, small and mostly triangular and 

 rigid: flowers not attenuate at base: ovary glabrous. Mostly annuals. — 

 Ganysma. 



* Annuals : leaves all radical or nearly so, and mostly rounded : involucres, 

 flowers and akenes small (a line long or less). — (§ Pedunculata, Bentii., 

 Torr. & Gray, e.xcl. sp.) 



■t- Flowers glabrous ; outer sepals broad and somewhat cordate at base, the 

 inner much smaller : pedicels very short, deflexed : leaves floccose-tomen- 

 tose. 



33. E. BRACHYPODUM, Torr. & Gray. Low, depressed, rather 

 rigid, much branched and glandular: iuvolucres campanulate-turbinate, 

 ^ to f line long, on pedicels less than a line long. — S. E. California. 



34. E. Parryi, Gray in Proc. Am. Acad. x. 77. Less rigidly 

 branched : iuvolucres rather narrowly turbinate, a line long : pedicels 

 slender, 1 to 3 lines long. — S. Utah. 



35. E. DEFLEXUM, Torr. Taller and more erect, glabrous above 

 the base : involucres and pedicels as in £J. brachypodum, but more 

 secund along the branches ; jjedicels reflexed, rarely a line long or 

 more : outer sepals becoming a line long, the inner very small, obovate 

 and retuse. — Nevada and Utah to S. K. California. 



H- t- Flowers glabrous ; outer sepals panduriform or oblong and emarginate or 

 retuse, the inner narrower : pedicels longer : leaves floccose-tomentose. 

 ++ Pedicels deflexed : outer sepals oblong or somewhat broader above. 



3G. E. NUTA:ys, Torr. & Gray. Low, sparingly branched : leaves 

 small : pedicels minutely glandular : involucres campanulate : outer 

 sepals nearly obcordate. — N. E. California and N. Nevada. 



37, E. Watsoni, Torr. & Gray. Taller, more diffuse, glabrous : 

 leaves larger, obtuse, round, often cordate at base : involucres narrowly 

 turbinate : outer sepals oblong, often retuse. — N. Nevada. 



38. E. CERNUUJi, Nutt. Like the last, but leaves broadly ovate, 

 acute : involuci'es turbinate-campanulate : flowers narrower at base, 

 the outer sepals broader above, retuse. — E. Oregon to Colorado and 

 New Mexico. 



