316 COMPOSITE ERIGERON 



* * Submaritime perennial : heads full one inch in diameter: involu- 

 . ere rather loose, villous with long multiseptate hairs : rays about 100, 



rather broad, aster like: pappus simple: leaves obovate or spatulate, 

 ample, mostly entire. 



E. glaucus Ker. Bot. Reg. t. 10. A span to a foot high, viscidulous 

 and m ,re or less pubescent, produc ng a tuft of radical leaves from a rather 

 fleshy crown and some ascending monocephalous or occasionally branch- 

 ing stems; leaves glaucescent or pale green but hardly glaucous, somewhat 

 succulent ; larger radical 3-4 inches long by an inch wide, rarely 2-3-toothed ; 

 upper eauline few, spatulate-oblong, obtuse, sessile, 10-18 lines long: rays 

 half-inch long, bright violet : achenes 4-nerved. Ou banks or bluffs of the 

 Pacific coast within the influence of salt water, Oregon to southern Califor- 

 nia. 



* * * True perennials from rootstocks or a caudex, neither stolon- 

 iferous surculose nor flagelliferous : involucre from hisp'^i or villous 

 t > glabrous but not lanate, in the first species loose and spreading. 



*- Comparatively tall and large, a foot or more high, except in al- 

 pine or depauperate forms, leafy-stemmed, glabrous to soft-hirsute : 

 leaves ratuer ample, entire or sometimes few-toothed: heads pretty 

 large with usually very numerous rays. 



n- Aster-like; the rays comparatively broad: heads solitary or on 

 larger plants few and corymbosely disposed : pappus simple. 



E. salsuginosus Gray Prop. Am. Acad. xvi, 93. Rootstocks short and 

 thickish : stems 7-20 inches high, the summit or peduncles lanate-pubes- 

 cent or puberulent: no bristly or hirsute hairs : leaves very smooth and 

 glabrous or glabrate. thickish ; radical and lower cauline leaves spatulate 

 to nearly obovate, with base attenuate into a margined petiole, 1-3 inches 

 long ; upper cauline ovate-oblong to lanceolate, sessile, mucronate or apic- 

 nlate-acuminate; uppermost small and bract-like: bracts of the involucre 

 loose or e\ en spreading, linear-subulate, or attenuate, viscidalous or pu- 

 berulous (or at some northern stations sometimes pubescent) : disk over 

 half-inch in diameter: rays 50-70, purple or violet, half-inch or more long. 

 Wet ground, Kotzebue Sound and Unalaska and along the higher 

 mountains to California and the Racky mountains. 



E. peregrinus Greene Pitt, iii, 166 Aster peregrinus Pursh. Tomentose- 

 punescent and glabrate : stems slender, erect, usually solitary, 1-2 feet 

 high, leafy: rootstock slender, creeping: lo\\er cauline and radical leaves 

 oblong-lanceolate, attenuate below to a margined petiole, 2-3 inches long, 

 upper cauline lanceolate to ovate-lanceolate, entire or shapely denticulate: 

 hea-l solitary, or rarely 2, half -inch or more high, terminating the simple 

 stem: bracts of the involucre linear, acuminate, 5-7 lines long, tomentoae- 

 pubescent or villous, not at all viscid or glandular: rays 20-30, 6-8 lines 

 long, pale to dark purple or violet. Wet meadows, Arctic coast and 

 Alaskan Islands to the mountains of Northern Washington and Idaho. 



E. Howellii Gray Syn. Fli. Pt. 2, 209. Rootstocks slender: stem 

 12-20 inches high, leafy: leaves membranaceous, glabrous and smooth; 

 radica 1 , slender, petioled, with oval or obovate blade; cau'ine mostly ovate 

 with b oad half clasping base, 1-2 inches long by an inch broad ; mucronate- 

 acumina-e: peduncle puberulent: heads solitary, 8-10 lines broad: bracts 

 of the involucre subulate, the inner ones acuminate : rays only 30-35, 8-10 

 lines long, often 2 linea wide, white. Moist rocky banks along the Colum- 

 bia river near the Cascades. 



E. cervinns Greene Pitt, iii, 163. Stems slender, 8-12 inches high, from 

 s'out ascending rootstocks, leafy at base, the whole herbage glabrous, 

 only the peduncles and involucre glandular and slightly puberulent: 



