CATALOGUE. 87 



the segments linear. — East Humboldt Mountains, Nevada; 9,000 feet alti- 

 tude; July. (330.) 



Var. piNNATiSECTA. Silky-pubescent ; leaves pinnate, leaflets cuneate- 

 ovate or oblong, pinnately lobed, the segments oblong. — This approaches and 

 may be the sanie as P. Plattensis, Nutt., which however was collected by him 

 on the plains of the Platte, while these specimens, as well as somewhat simi- 

 lar ones from Colorado and the Sierras (161 Hall & Harbour, 165 Vasey, 

 5084 Bolander) are decidedly alpine. P. Soongarica, Bunge, scarcely differs 

 from some of these specimens. East Humboldt Mountains, Nevada, and on 

 the Wahsatch and Uintas ; 10-11,000 feet altitude ; July, August. (331.) 

 A still more alpine form of this variety, more densely pubescent and with 

 smaller and more crowded leaflets, was collected in the Clover Mountains, 

 and in the Uintas ; 11-12,000 feet altitude; August, September. (332.) 



PoTENTiLLA PULCHEERiMA, Lehm. (P. Pennsylvanica, var. pulcherrima, 

 T. & G.) Stem ascending, villous ; leaves 7-9-foliolate, upper ones 5-folio- 

 late, leaflets crowded or even digitate, elliptic, equally serrate, appressed- 

 pilose above, white-tomentose beneath ; stipules ovate, acute, entire ; flowers 

 upon slender pedicels in a loose corymbed panicle ; petals obcordate, longer 

 than the acuminate green sepals ; styles slender, not fleshy nor thickened at 

 base. — Stems tall (2° high) and slender, with 1-2 leaves, few from one root, 

 somewhat purplish ; leaflets 1-3' long ; flowers bright orange, in an open pan- 

 icle ; sepals not tomentose. This species has been considered a variety of 

 P. Pennsylvanica, but is distinguished by its long slender styles and its much 

 looser panicles. If reduced, it must be referred rather to P. nivea, as Penn- 

 sylvanica to sericea. Collected by Drummond in the Rocky Mountains, lati- 

 tude 52-56°. East Humboldt Mountains, Nevada, and Uintas; 6,500-8,000 

 feet altitude ; July. (333.) Some of the specimens collected have the 

 leaves perfectly digitate ; evidently the same as the last, and sometimes grow- 

 ing with it. From the East Humboldt Mountains, Nevada, and the Wah- 

 satch ; 5,500 feet altitude ; June, July. (334.) 



PoTENTiLLA NIVEA, L. Villous or tomentose ; stems ascending, few- 

 flowered ; leaves mostly radical, palmately 3- (rarely 5-)foliolate ; leaflets oval 

 or obovate-cuneiform, pinnatifid, toothed or incised, silky-hirsute or nearly 

 glabrous above, canescent-tomentose beneath ; stipules lanceolate, entire ; 

 petals broadly obcordate, longer than the acute calyx-segments. — A low arctic 



