Part 4, 1908] ROSACEAE 333. 
slightly villous or tomentose, nearly scapose or with few very small leaves, 1-2-flowered ; 
leaves crowded, ternate, silky or glabrate above, densely white-tomentose beneath; leaflets 
1-1.5 cm. long, broadly cuneate or rhombic-obovate, deeply cut from the apex into coarse 
oblong-lanceolate teeth ; flowers 15-20 mm. in diameter; hypanthium white or grayish, villous 
or somewhat tomentose, about 8 mm. in diameter; bractlets lanceolate, nearly equaling the 
ovate-lanceolate acute sepals, 4-5 mm. long; petals yellow, obcordate, 6-8 mm. long; 
stamens 20; pistils many; styles filiform. 
TYPE LOCALITY: Davuria [southeastern Siberia]. 
DISTRIBUTION : Arctic-alpine regions: Eastern Asia, and in America from Alaska to Oregon, 
Colorado, and on the arctic coast to Coppermine River ; ‘perhaps also in Greenland. 
f3 ILLUSTRATIONS : Lehm. Monog. Potent. p/. 18 ; Mem. Dep. Bot. Columbia Univ. 2: p/. 35, 
110. Potentilla Vahliana Lehm. Monog. Potent. 172. 1820. 
Potentilla hirsuta Vahl.; Hornem. Dansk Oecon. Pl. ed. 2. 500. 1806. Not P. hirsuta Michx. 1803. 
Potentilla Jamesoniana’ Greville, Mem. Wern. Soc. 3: 417. 1821. 
Potenilla nivea gp R. Br. Chlor. Melv. 19. 1823. 
Poteniilla nivea y T. & G. Fl. N. Am. 1: 441, in part. 1840. 
Potentilla nivea Vahliana Seem, Bot. Voy. Herald 29. 1852. 
Potentilla nivea hirsuta Durand, Proc. Acad. Phila. 1863: 94, 1863. 
Densely cespitose, the stout, woody, much-branched caudex covered with the brown 
scarious stipules and remains of old leaves; flowering stems nearly leafless, 1-2-flowered, 
about 5 cm. high, densely covered with yellowish hairs; leaves crowded, short-petioled, 
ternate, silky above, slightly tomentose and rather densely yellowish-villous beneath ; 
leaflets generally less than 1 cm. long, cuneate and coarsely dentate at the apex; flowers. 
about 15-20 mm. in diameter; hypanthium yellowish silky-villous, about 1 cm. in fruit; 
bractlets and sepals broadly ovate, oval, or elliptic, often obtuse, subequal, 4-5 mm. long ; 
petals nearly orange, broadly obcordate, overlapping each other and often broader than 
long, nearly twice as long as the sepals; stamens 20; pistils numerous; styles filiform. 
TYPE LOCALITY: Greenland. . ' 
DISTRIBUTION: Greenland, Hudson Bay region, and arctic coast of America; also Herald 
Island. 
ILLUSTRATIONS: Fl. Dan. p/. 1790; Mem. Wern. Soc. 3: pl. 20; Mem. Dep. Bot. Columbia 
Univ. 2: pl. 35, f. 8-22. 
111. Potentilla villosa Pall.; Pursh, Fl. Am. Sept. 353. 1814. 
Potentilia lucida Willd.; Schlecht. Ges, Nat. Freunde Berlin Mag. 7: 296. 1815. 
Potentilla fragiformis villosa Regel & Tiling, Fl. Ajan. 85. 1858. 
Potentilla villosa aurea Lehm. Stirp. Pug. 9: 67. 1851. Not P. aurea T,. 1753. 
Potentilla villosa chrysocoma Rydb. Mem. Dep. Bot. Columbia Univ. 2: 88. 1898. 
Perennial, with a short caudex, somewhat tufted; stemsseveral from the stout caudex, 
few-flowered, 1-3 dm. high, villous with spreading white hairs or pubescence of the whole 
plant yellowish (var. aurea or chrysocoma) ; stipules ovate to elliptic, 10-15mm. long, the 
lower scarious and brown, the upper silky and white-tomentose ; basal leaves stout-peti- 
oled, ternate, densely silky above, densely white-tomentose and with prominent 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 diameter: bractlets. 
elliptic to broadly ovate or oval, equaling or exceeding the triangular-ovate sepals, 5— 8 mm. 
long ; petals yellow, broadly obcordate, 6-12 mm. long; stamens about 20; pistils numer- 
ous; styles filiform. 
TyPE LOCALITY : Northwest coast. . : ; 
DISTRIBUTION : Altai, eastern Siberia; and in North America from Alaska to the mountains. 
f Washington. : ; 
: eed Ayer Lehm. Monog. Potent. /. 16; Mem. Dep. Bot. Columbia Univ. 2: pi. 34, 
fils. 
XXUI. Frigidae. Plants low with a scaly rootstock, often tufted. Leaves digitately 
3-foliolate, not at all tomentose, in ours coarsely toothed. Petals yellow, obcordate. Styles. 
filiform, but sometimes short. The group is very nearly related to AUREAE and NIVEAE, 
differing from the former only in the number of the leaflets, and from the latter by the 
lack of tomentum. 
