268 PROCEEDINGS OF THE AMERICAN ACADEMY 



outer sepals ciineate-obovate, the inner slightly narrow : akene some- 

 what pubescent, — San Diego County, California, and in S. Utah; 

 Dr. Edward Palmer. 



H-c -w. -w Annuals : leaves usually rosulate at tiie base, and occasionally occur- 

 ring at the nodes. 



= Tomentose throughout : branches of the panicle virgate, sparingly divided : 

 involucres narrow, 2 lines long. 



88. E. viRGATUM. Benth. A foot or two high : leaves oblanceo- 

 late : branches elongated, ascending : flowers glabrous, a line long, 

 white, reddish, or yellow. — California ; variable, verging upon JE. vim- 

 ineuiifi. 



89. E. DASTANTHEMUM, Torr. & Gray. Shorter, more slender : 

 leaves rounded, somewhat scattered : panicle more branched, rather 

 diffuse : involucres very narrow : flowers a line long or less, somewhat 

 villous. — N. California. 



= = More slender and diffuse, glabrous or somewhat tomentose : involucres 

 smaller, narrow or turbinate. 



90. E. viMiNEUM, Dougl. Rather diffuse, the branches often 

 elongated, usually somewhat tomentose, at least below the panicle : 

 leaves i-ounded to broadly ovate: involucres IJ lines long, narrow and 

 often contracted above : flowers rose-colored, or yellowish, a line long 

 or more. — Washington Territory to N. Nevada and S. California ; 

 variable. 



91. E. Baileyi, Watson, Proc. Am. Acad. x. 348. Very diffusely 

 much-branched, glaucous and glabrous : leaves round to broadly ovate, 

 densely tomentose : involucres .a line long or usually less, mostly wider 

 above with obtuse teeth : flowers |^ to f line long. — Var. tomen- 

 TOSUM. Loosely tomentose throughout : bracts more linear : involucres 

 broadly turbinate, deeply toothed. — N. W. Nevada to S. California 

 and Arizona. ''■ 



92. E. gracile, Benth, Usually more strict and narrowly pani- 

 cled, more or less tomentose throughout: leaves oblanceolate or ob- 

 lonor : bracts more or less elongated or foliaceous, the lower often 

 including one or more leaves: involucres a line long or less, broader 

 above, with rigid acute teeth: flowers f line long. — S. California; 

 very variable. 



93. E. POLYCLADON, Benth. Stouter, white-tomentose throughout, 

 the stem leafy its whole length : panicle erect and elongated : leaves 

 oblong-lanceolate : sepals narrower at base and bracteoles much more 

 villous. — Arizona and New Mexico. 



