ROSACEAE. 
183 
Leaves nearly equally white on both sides ; upper leaflets not decurrent. 
31. P. Hippiana. 
Leaves greener above; upper 3 leaflets more or less decurrent on the rachis. 
32. P. propinqua. 
Bractlets much shorter than the acuminate sepals; leaves merely floccose; hence 
dull. 
Leaves thick, densely floccose; pistils numerous. 33. P. effusa. 
Leaves thin; tomentum sparse and more or less deciduous ; pistils few. 
34. P. coloradensis. 
Leaves grayish silky. 
Stem stout, erect, 6-7 dm. high ; leaflets obovate or oblong, coarsely serrate, the 
upper decurrent on the rachis. 35. P. ambigens. 
Stem 1-4 dm. high; leaflets cuneate, toothed at the apex only, conduplicate, 
none decurrent. 36. P. crinita. 
1. Potentilla paradoxa Nutt. (P . supina Am. auth. ; not L.) In wet places 
from Ont. and Wash, to N. M.; also Mex. and western Asia.—Steamboat 
Lake. 
2. Potentilla rivalis Nutt. In wet places from Sask. and Ore. to Mex. — 
Alt. up to 8000 ft.—Lee’s Lake; along the Conejos River, north of Antonito; 
Ft. Collins; Quimby; along the Platte River, Denver; Georgetown; New 
Windsor. 
3. Potentilla leucocarpa Rydb. (P. milligrana Engelm.; not Dougl.) In 
wet meadows from Ill. and Wash, to N. M. and Calif.—Poudre Canon; Mid¬ 
dle Park; Steamboat Springs. 
4. Potentilla lateriflora Rydb. (P. biennis Rydb., in part; not Greene) In 
loose soil from Ass. and B. C. to Colo, and Ariz.—Alt. about 8000 ft.— 
Gunnison. 
5. Potentilla monspeliensis L. (P. norvegica hirsuta T. & G.) In fields 
and waste places from Lab. and Alaska to D. C. and Mex.—Alt. up to 8000 
ft.—Along Conejos River, north of Antonito; Rist Canon; Soldier Canon; 
Gypsum; La Porte; Ft. Collins; Rocky Ford; near Boulder; Gunnison; Iron- 
ton Park; Ruxton Park; New Windsor; Pagosa Springs; Green Mountain 
Falls; Pike’s Peak; Placer Gulch; Beaver Creek. 
6. Potentilla concinna Richardson. (P. humifusa Nutt.) Dry hills and 
mountains from Sask. and Alb. to Colo, and Utah.—Alt. 5000-10,000 ft.— 
Devil’s Causeway; North Park; Empire; Lake City; Georgetown; Cameron 
Pass; Mt. Abram; Cumberland Mine, La Plata Mountains; Little Kate 
Mine; West Spanish Peak; Little Veta Mountain; headwaters of Sangre de 
Cristo Creek; Spicer, Larimer Co. 
7. Potentilla bicrenata Rydb. Dry mountains of N. M. and Colo.— 
“ Colorado.” 
8. Potentilla quinquefolia Rydb. (P. nivca subquinata Lange; P. nivea 
pentaphylla Lehm.) On dry mountains from Greenl. and B. C. to Colo.— 
Alt. 10,000-14,000 ft.— Cumberland Mine, La Plata Mountains; West Spanish 
Peak; Mt. Hesperus; Hahn’s Peak. 
9. Potentilla dissecta Pursh. (P. diversifolia Lehm.) On hills and moun¬ 
tain sides from Sask. and B. C. to Colo, and Calif.—Alt. up to 13,000 ft.— 
Lake City; headwaters of Clear Creek; Cameron Pass; Lake City; Caribou; 
Willis Gulch; Pagosa Springs; Carson; Alpine Tunnel; Buffalo Pass Park; 
Mt. Princeton; Little Kate Mine; Ouray; Estes Park; Spicer. 
