SYNOPSIS OF THE FLORA OF COLORADO. 85 



tomentose wool, inner scales entire, spine-tipped ; flowers yellow. Hall 

 c(- Harbour i 341. Sangre de Christo Pass, Brandegee. White House 

 Mountain and Mount La Plata, at 13,000 feet altitude, Coulter. 



CIRSIUM OCHROCENTRUM, Gr. PL FendL, p. 110. Stem very leafy, 

 erect, 2-3 high, webby-tomentose ; leaves piunatifid, sessile; upper- 

 most decurrent, becoming glabrate ; cauliiie leaves 4'-6' long, very 

 spiny ; opines 6" in length, yellow ; heads subsolitary, sessile on the 

 ends of the branches, rather small, V or less in diameter ; scales of the 

 globose iuvolucre glabrous, abruptly ending in stout yellow spines 6" in 

 length. Wet Mountain Valley, Brandegee. 



STEPHAN03IERIA 1 MINOR, Nutt. /^Including S. runcinata, Nutt.) Pe- 

 rennial, glabrous; stems single, much branched, l-2 high, lower leaves 

 2 / -3 / long, runcinately toothed, upper ones reduced to subulate entire, 2-4 

 toothed bracts ; heads 5-7 flowered, solitary on the ends of the branch- 

 lets: proper involucral scales 5-7, 4 // -5 // long; achenia 5-ribbed, smooth \ 

 pappus of 15 distinct setae, plumose nearly or quite to the base. Hall & 

 Harbour, 346. Plains near Denver, B. H. Smith. Colorado Springs. 

 Porter. 



CYNTHIA VIRGINICA, Don. Wet Mountain Valley, Brandegee : Red- 

 field. 



TROXIMON CUSPIDATUM, Pursh. Plains around Denver and Saint 

 Vrain River, Coulter. 



HIERACIUM FENDLERI, Schultz. (Crepis ambigua, Gr. PL FendL, p. 

 114.) Stem scape-form and simple from a perennial root, or with 1 or 2 

 elongated branches from the base or near it, each bearing 5-8 heads ; 

 leaves obovate-oblong, very entire, beset with scattered, spreading, 

 hispid bristles, otherwise very smooth, 2 / -3 / long, sessile, the radical 

 with a tapering base, somewhat purplish underneath ; heads 9" long, on 

 rather long peduncles; florets about 30; involucre cylindrical, hairy, 

 scales linear, exterior ones twice shorter, appressed ; ligules very short, 

 a little longer than the pappus, usually a little shorter than the styles; 

 achenia fusiform, narrowed upwards, but not truly rostrate, 4" in length, 

 many-ribbed, very smooth, as long as the copious, dull- white pappus. 

 Mace's Hole, Fremont Countv, Brandegee. Parry. Wet Mountain Val- 

 ley, Redfield. 



HIERACIUM ALBIFLORUM, Hook. Stems simple, l-3 high, rather 

 slender, smooth above, hispid near the base, like the petioles and mid- 

 ribs, with rather long deflexed hairs ; leaves mostly radical or low on the 

 stem; oblong-lanceolate, acute, entire or denticulate ; heads rather small, 

 on nearly smooth, bracteolate pedicels, in a compound, at length very 

 open corymb; involucre nearly ecalyculate, the blackish scales sparsely 

 hairy; flowers white; about 20; achenia very slightly narro wed toward 

 the summit. Hall & Harbour, 350, " subalpine, west of the range; 

 rare." Mountain of the Holy Cross, Coulter. 



HIERACIUM TRISTE, Willd. Stem slender, simple, 6 / -12 / high, smooth 

 below, hispid with blackish hairs above; leaves chiefly radical, hirsutu- 

 lous or smooth, entire or remotely denticulate, mucronate, tapering into 

 slender petioles ; involucres hispid with blackish hairs ; flowers 20-30 :. 



J STKPHANOMERIA, Xutt. (Including Heiniptilium, Gray.) Heads 3-12 flowered j 

 the flowers all lignlate. Involucre cylindrical, calyciilate'; bracelets few, very .small; 

 proper scales 3-7, suheqtial, but in two species more numerous, unequal andimbricated.. 

 Receptacle naked, slightly honey-combed, Achenia oblong-linear or clfrvate-oblong, 

 with 5 prominent angles or ribs', the intercostal spaces either plain or tubereulate,, 

 rugose, or occupied by additional less elevated ridges. Pappus simple. .of. 5-25 plumose \ 

 filiform seta? or bristles, slightly dilated at the base. 



