SYNOPSIS OF THE FLORA OF COLORADO. 37 



grounds. Hall & Harbour 161. South Park, Porter. Wet Mountain 

 Yiil ley; Brandegee. 



POTENTILLA DISJECTA, Pursh. (P. diver sifolia, Lehm.) Watson's Rev., 

 L <?., p. 556. Low, alpine, more or less silky- villous with somewhat spread- 

 ing hairs, or nearly glabrous; stems decumbent or ascending, 3'-12' 

 long; stipules ovate or oblong -lanceolate, entire; leaflets 5-7, or 

 rarely but 3, often glaucous, closely pinnate, or as frequently digi- 

 tate, the upper one V long or less, cuneate- oblong, iueisely pinnatitid 

 or sen ate, the lowest often but trifid, the segments acute or acutish, and 

 more or less tufted with white hairs; flowers few, 011 slender pedicels, in 

 an open cyme; calyx more or less villous with spreading hairs, the bract- 

 lets short, the lanceolate sepals shorter than the petals, which are 2"- 

 4" long, obovate and retuse or obcordate; receptacle very villous; ^car- 

 pels 10-20, or more. Mountains near Denver, and Clear Creek Canon, 

 Coulter. Sangre de Cristo Pass, Brandegee. Gray's Peak, Dr. Smith. 



TAB. GLAUCOPHYLLA, Lehin. Glaucous-green ; leaves digitate, nearly 

 glabrous on both sides; leaflets silky on the margin, with unequal seg- 

 ments. Parry, 219; Yasey. 



POTENTILLA GTRACILIS, Dougl. Watson's Rev., L c.< p. 557. Villous and 

 more or less tomentose; stems 2-3 high; stipules ovate or lanceo- 

 late, entire or subiucised; leaflets mostly 7, sometimes 5, very rarely 

 but 3, euueate-oblong, obtuse, incisely serrate or pinnatifid, tomentose 

 beneath, green above and subvillous or appressed-silky, i'-2-J' long; 

 flowers in a loose subfastigiate cyme, the pedicels at length elongated 

 and slender; calyx with the narrow bractlets shorter than the broad 

 acute or lanceolate sepals; petals broadly obcordate, 3"-" long, a 

 little exceeding the calyx; carpels very numerous, (40 or more.) Gray's 

 Peak, Dr. Smith. 



VAR. RIGIDA, Watson. (P. rigida, JSTutt., not Wall. P. Xuttallii, Lehm.) 

 A mostly stout and tall form, villous* but without tomeutum ; the cyme 

 loose or crowded; the leaves often large, 3'-4' long or more, and prom- 

 inently veined beneath. Hall & Harbour, 1(52 in part and 158 in part. 



POTENTILLA HUMIFUSA, JSTutt. (P. concinna, Rich.) Watson's Rev., L c., 

 p. 558. Densely white-tomentose and silky -villous; stems decumbent, 

 2'-4' long, slender; leaflets 5, cuueate-obloug, 6"-9" long, green and ap- 

 pressed-silky above, only the rounded or truncate apex serrate with 

 3-5 teeth; flowers 3-5, on slender pedicels; bractlets narrow, shorter 

 than the acute sepals; petals 2 // -3 // long, obcordate, exceeding the 

 calyx; carpels 15-20. Subalpine. Hall & Harbour, 157. Marsh near 

 Long's Peak, Coulter. 



POTENTILLA NIVEA, L. Watson's Rev., I. c..p. 558. Pubescence silky- 

 villous, often abundant, densely white-tomentose on the under side of 

 the leaves and sometimes upon the calyx; stems 2'-12 / high; leaflets 

 cuneate-obovate or oblong, 3"-8" long, coarsely iucised-serrate or pin- 

 natifld, the terminal one sessile or petiolulate; flowers few or solitary, 

 on slender pedicels; bractlets acute or acutish, shorter than the sepals; 

 petals 2 // -4 // long; carpels few or many. Parry, 214 and 215; Vasey. 



POTENTILLA GRAYI, Watson, in Rev. I. c., p. 560. Pubescence scanty, 

 villous; stems slender, 3'-6' high, 3-6 flowered; stipules ovate or ob- 

 long, entire; leaflets very broad and suborbicular, long, the trun- 

 cate or rounded apex 5-7-toothed, the middle leaflet long-petiolulate ; 

 sepals acute, the bractlets but half as long and obtusish; petals 2"- 

 3" long, orbicular, retuse, exceeding the calyx; carpels 15-20. Gray's 

 Peak, Dr. Gray. 



