OF ARTS AND SCIENCES. 263 



flowers rose-colored, white, or yellow ; outer sepals oblong, becoming 

 orbitailar, the inner sjxatulate, often retuse. — Var. proliferum. In- 

 volucres more or less cjmose-umbellate. E. proliferum, Torr. & Gray. 

 — N. California to Colorado and British America ; frequent. 



59. E. DiCHOTOMUM, Dougl. Caudex more diffuse : leaves oblan- 

 ceolate, acute : lower bracts often foliaceous : inflorescence cymose- 

 umbellate ; the involucres mostly solitary, about three lines long, strongly 

 toothed: flowers white or pinkish ; outer sepals broadly elliptical, the 

 inner linear-spatulate. — E. Greenel, Gray, Proc. Am. Acad. xii. 83. 

 Oregon and N. California. 



60. E. NIVEUM, Dougl. Like the last : most of the bracts more or 

 less foliaceous and spreading : involucres usually shorter and broader, 

 with some or all of the teeth jjroduced and often recurved : outer sepals 

 round-oval, the inner obovate-spatulate. — Including E. strictum, var. 

 lachnostegia, Benth., referred to the last in Torr. & Gray, Rev. 175. 

 Washington Terr, to Oregon and Idalio. 



* * Flowers narrower at base, the sepals similar and nearly equal: akenes 

 smooth or nearly so. 



-!- Perennials with short-branched caudex, naked peduncles, small bracts, and 



capitate involucres (rarely solitary). 

 *+ Heads solitary (few and umbelled in n. 66) : dwarf and cespitose, alpine or 



subalpine, densely white-tomentose. — (§ Capitata, Torr. & Gray, excl. sp.) 



61. E. Kennedyi, Porter, MS. Dwarf and very densely matted : 

 leaves narrowly oblong, revolute, 1^^ to 3 lines long, densely tomeutose 

 both sides : peduncles very slender and wiry, glabrous, 2 to 4 inches 

 high: involucres 2 to 10, somewhat tomeutose, thick and strongly 

 nerved, with short teeth, 1 \ lines long : flowers glabrous, wliite, veined 

 with red, H lines long. — In the Sierra Nevada, Kern Co., California ; 

 W. L. Kennedy, 1876. 



62. E. KixGir, Torr. & Gray, excl. var. Dwarf and densely cespi- 

 tose, villous-tomentose throughout : leaves oblanceolate or spatulate, an 

 inch long or less, including the slender petiole : involucres thin and 

 scarious, deeply toothed, villous, in dense heads : flowers rose-colored, 

 glabrous. — N. Nevada. 



63. E. PAUCiFLORUM, Nutt. Rather less densely cespitose, tomeu- 

 tose throughout, or the linear-oblanceolate revolute leaves (2 inches 

 long) glabrous above : involucres broadly turbinate, nearly glabrous, 

 2 lines long, thin, with broad somewhat scarious teeth : flowers white, 

 glabrous. — Colorado. 



64. E. ciiuYsoCEPHALUM, Gray, Proc. Am. Acad. xi. 101. Caudex 

 more diffusely branched, woody : tomeutose throughout, the narrowly 



