62 SYNOPSIS OF THE FLORA OF COLORADO. 



4 / -12 / long; leaves small, entire, acute, the radical somewhat spatulato, 

 narrowed into a short petiole, the cauline scattered, sessile, linear, nar- 

 rowed at the base; heads small, mostly solitary, terminating the naked 

 branchlets or peduncles; rays very narrow and numerous, twice the 

 length of the hirsute involucre, purplish ; inner pappus of few, very 

 slender and deciduous bristles. Hall & Harbour, 237 and 246; Hoope*. 

 Chicago Lakes, at 12,000 feet altitude, Coulter. Brandegee; Dr. 8tnith. 

 Colorado Springs, Porter. 



ERIGERON CANUM, Gr., PI. Fendl., p. 67. Stems 3'-4' high, simple? 

 leafy to the summit, from a thick root, caespitose, bearing single heads, 

 silky-canescent as well as the very entire, Imear-spatulate leaves; rays 

 white, in about one series, twice longer than the white-hirsute involucre; 

 achenia very glabrous, narrow, with about 10 conspicuous ribs; pappus 

 of the ray and disk similar, double, the outer of very short subulate 

 setaceous bristles. "Common on low mountains," Hall & Harbour, 244 

 (as E. ccespitosum, ^N"utt.) 



GuTiERREZiA 1 EuTHAMi^E, T. & G. Stems woody and much branched 

 at the base, numerous, 6'-15' high, angled, leaves crowded, narrowly 

 linear, acute, attenuate at the base, l'-2' long, J"-l" wide, 1-nerved, 

 scabrous, punctate, resinous and sometimes varnished; corymb com- 

 pound, fastigiate, contracted; heads small, glomerate, turbhiate-cylin- 

 drical; involucre scarcely 2" long and I" broad, narrowly obovate; 

 flowers of the ray 2-5, the disk 3-6; pappus of 9-10 obtuse, unequal, 

 erose-denticulate, chaffy scales, a little shorter than the achenium. 

 Hall & Harbour, 294. Caiiou City, Brandegee. Near Denver, Dr. Smith. 

 Canby. 



SOLIDAGrO VlRGA-AUREA, L., var. MULTIRADIATA, T. & G. Stems vil- 



lose- pubescent especially towards the summit, most 1 v .simple, S'-15' high ; 

 leaves ciliate, oblong-lanceolate; radical ones obovate and narrowed 

 into a petiole; heads large, in a dense compound raceme or loosely 

 corymbose; scales of the involucre ciliolate, acute; rays 8-18. Hall A- 

 Harbour, 251. Sierra Madre Eange and Twin Lakes, Coulter. George- 

 town, Dr. Smith. 



Var. ALPINA, Big. Gray's Peak, Dr. Smith. South Park, Twin Lake 

 Creek and Horse Shoe Mountain, at 11,000 feet altitude, Coulter. 



Var. HTJMILIS, Gr. (8. humilis, Pursh.) Sierra Madre Range, Coulter- 



SOLID AGO GUIRADONIS, Gr., Proc. Am. Ac., v. 6, p. 54.3. Smooth, stem 

 slender, erect, 2-3 high, from a woody rhizoma; lowest leaves 

 lanceolate, 6' long, 3"-5" broad, tapering into a margined petiole, the 

 cauline ones very narrowly linear, 2'-3' long, 3"-5" broad : panicle -ivrt, 

 not one-sided, very narrow and composed of fe\v and rather small 

 heads; involucral scales, linear, acuminate, the mid vein broad and 



1 GUTIERREZIA, Lagasca. Heads small or middle-sized, 6-90 flowered ; the rays pistil- 

 late, fertile ; the disk-flowers tubular, perfect and fertile. Involucre varying from nar- 

 rpwly-obconic to broadly-hemispherical ; the scales closely imbricated in several series, 

 rigid, and with greenish herbaceous tips. Receptacle naked. Corolla* yellow ; of the 

 ray oval, oblong or linear; of the disk fnnnel-shaped, 5-toothed. the teeth erect or re- 

 curved. Branches of the style in the ray-flower, linear. smooth : the stigmatic lines 

 extending to the top; in the disk with the' hairy appendages shorter or >. \ eral times 

 longer than the stigmatic portion. Achenia oblong or ohconi' . terete or somewhat 

 compressed. Pappus of the disk composed of several oblong or linear chatty scales, or 

 reduced to a lacerate i-oioniform bonier; of the ray similar to that of the disk, bat 

 commonly smaller or sometimes obsolete. Mostly perennial and suti'ruti<-o>.c- plants of 

 North and South America, with glabrous and often resinous-dotted or varnished linear 

 and entire, or broader and denticulate leaves. 



