60 SYNOPSIS OF THE FLORA OF COLOKADO. 



Summit of Pike's Peak, Porter. Snow Mass Mountain, at 13,000 feet 

 altitude, Mount Lincoln at 12,000 feet, and Long's Peak, Coulter. Sangre 

 de Cristo Pass, Brandegee. Gray's Peak, Redfield. 



ERIGERON TRIFIDUM, Hook. Fl. Bor.-Am. 2, p. 17, 1. 120. Hirsute ; 

 stems 2 / -3 / high, leafy below, naked or scape-like with 1-2 linear bracts, 

 bearing a single head ; leaves on long petioles, deeply 3-cleft or lobed, 

 segments short, very obtuse, the middle one orbicular, the lateral occa- 

 sionally 2-lobed; scales of the involucre lance-linear, hirsute, about the 

 length of the disk ; rays twice as long, white or blue, rather broad ; 

 achenium minutely hairy; pappus hispid-scabrous, as long as the disk 

 of the corolla. Alpine. White House Mountain, at 13,000 feet altitude, 

 Coulter. 



ERIGERON TJNIFLORUM, L. Sparsely pubescent, becoming somewhat 

 glabrous ; stem 3'-6' high, bearing a single head ; lower leaves spatu- 

 late, cauline lanceolate or linear, obtuse or acute, entire ; pistillate flow- 

 ers nearly all ligulate; rays somewhat erect, scarcely twice the length of 

 the very woolly involucre; wool deep-purple or sometimes light-colored, 

 or white. Hall & Harbour, 243. Snow Mass Mountaiu, at 13,000 feet 

 altitude, and Mount Lincoln, at 12,000 feet, Coulter. 



ERIGERON GRANDIFLORUM, Hook. Perennial, hirsute and somewhat 

 woolly ; caudex thick ; stems 1-5, 3' -8' high, rather leafy, bearing a 

 single head; radical leaves oblong-spatulate, l'-2'- long, 2" -3" wide, 

 those of the. stem smaller and linear-lanceolate; heads solitary, large ; 

 involucre very woolly; scales herbaceous, elongated, with naked purple 

 tips ; rays numerous, long, white or purple ; achenia sparingly hirsute ; 

 pappus of barbellate setae rather shorter than the disk corollas, and 

 with a few very short ones intermixed. Mount Lincoln, at 12,000 feet alti- 

 tude, July, Coulter. 



Yar. ELATIUS, Gr. Sill. Jour. (N. S.) 33, p. 8. l-2 high, very leafy, 

 pilose; lower leaves oblong-lanceolate, tapering to the base; all the 

 leaves scabrous-pubescent, mucronate-apiculate ; upper ones ovate and 

 ovate-lanceolate, or sometimes narrowly lanceolate, sessile by a some- 

 what clasping base ; heads solitary or corymbose, 2-6, large ; involucre 

 often I 7 broad, densely woolly; rays numerous, narrow, pale-pink. Dif- 

 fers so much from the typical form that it might well constitute a dis- 

 tinct species. Hall & Harbour, 238 ; Dr. Smith. Weston's Pass and 

 Sierra Madre Range, Coulter. 



ERIGERON GLANDULOSUM, Porter, (n. sp.) Minutely glandular-puber- 

 uleut, and hirsute with long, scattered, spreading, jointed hairs ; stems 

 simple, one or several from a thick, woody, often branched caudex, bear- 

 ing single heads ; leaves narrowly spatulate, radical ones 2 / -4 / long ; 

 heads, including the numerous purple or blue rays, 9"-15" broad ; scales 

 of the involucre in about 3 series, equaling the disk, lance-linear, inner 

 ones scarious, more or less purplish ; achenia sparingly hirsute ; pappus 

 with shorter bristles intermixed with the longer ones.-*-Near E. ursinum, 

 Eaton, in King's Rep., v. 5, p. 148. Hall & Harbour, 235. Clear Creek 

 Canon, Boulder Cation, and Twin Lakes, Coulter. 



ERIGERON ARMERL^FOLIUM, Turcz. Gray, Proc. Am. Acad. v. 8, p. 

 648. Hall & Harbour, 232, (as E. acre, L.) South Park, Porter. 

 Twin Lakes and on the Upper Arkansas, Coulter. 



ERIGERON BELLIDIASTRUM, Eutt. Annual, hirsute-pubescent, 1 or 

 more high ; stem corymbosely much branched, leafy throughout ; 

 branches elongated and divaricately spreading; lower leaves on slender 



