88 MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 
IuLusrrations: Lehm. Mon. Pot. pl. 16. Puare 34, f. J, dissection of flower, f. 2; 
pistil, f. 3; stamen, f. 4; fruiting hypanthium, f. 4. 
Somewhat tufted. Stems several from the stout caudex, few-flowered, 1-3 dm. high, 
villous with spreading white hairs. Stipules ovate to elliptic, 10-15 mm. long, the 
lower scarious and brown, the upper silky and white-tomentose. Basal leaves stout- 
petioled, ternate, densely silky above and densely white-tomentose and with pre mminent 
veins beneath; leaflets 2-4 cm. long, broadly cuneate, obovate or nearly orbicular, the 
lateral ones much oblique, coarsely toothed. Stem leaves few, smaller and subsessile. 
Flowers 2-3 em. in diameter. Hypanthium densely villous, in fruit 15-20 mm. in diam- 
eter; bractlets elliptic or broadly ovate, equalling or exceeding the triangular-ovate 
sepals. Petals yellow, broadly obeordate, exceeding the sepals by one-half. 
Watson follows Regel & Tiling in placing P. villosa as a variety under P. fragiformis. 
The two resemble each other in one important character, viz., the broadly oval obtuse 
bractlets, which, as well as the calyx, enlarge considerably in fruit. DP. villosa differs 
from P. fragiformis, however, in the leaves as well as in the flowers; those of the former 
are much thicker, densely silky above (rarely glabrate), and densely floecose and with 
prominent veins beneath. The flowers are about one-half larger than those of fragi- 
formis. t differs from all the species of the group in the large flowers, 2-3 cm. wide, 
stout habit, large leaves and broad bractlets.  P. villosa is a native of Alaska and adja- 
cent Asia, but is also found in the mountains of British C« jlumbia, Vancouver Island and 
Washington. 
Potentilla villosa chrysocoma. 
Potentilla villosa aurea Lehm. Pug. Stirp. 9: 67. 1851. Not. P. awrea L. 
Lehm. Rey. Pot. 171. 
Pubescence of the whole plant yellow. It approaches P. Vahliana in some respect. 
Alaska: B. J. Bretherton (Kodiak), 1894; Ferd. Bishoff (Sitka) 1865-6; Esch- 
scholtz (Unalaska). 
70. Potentilla uniflora Ledeb. 
Potentilla uniflora Ledeb. Mem. Acad. Petersb. 5: 543. 1812. 
Lehm. Mon. 29 & 183; Ser. in DC. Prod. 2: 572; Sprengel, Syst. Veg. 2: 54l. 
Potentilla macrantha uniflora Don, Gard. Dict. 2: 550, 1832. 
Potentilla nivea y Torr. & Gray, Fl. N. Am. 1: 441. In part. 1840. 
Potentilla villosa uniflora Ledeb. Fl. Ross. 2: 58. 1844. 
Potentilla nivea + macrantha f. uniflora Lehm. Del. Sem. Hort. Hamb. 1850: 11, 
1850. Stirp. Pug. 9: 68; Rev. Pot. 167. 
