Part 4, 1908] ROSACEAE 325 
~ 81. Potentilla Sierrae-Blancae Wooton & Rydb.; Rydb. Mem. Dep. 
Bot. Columbia Univ. 2: 57. 1898. 
Perennial, with a branched caudex covered with the brown remainsof stipulesand leaf- 
stalks; basal leaves numerous, with slender petioles 3-5 cm. long, digitately 5-foliolate, 
almost perfectly glabrous and dark-green; leaflets 1-2 cm. long, almost oblong-linear, 
slightly tapering downward, entire except the 3-toothed apex; stipules lanceolate, ciliate ; 
flowering stems very slender, almost leafless and usually 1-flowered, 4-6 cm. long, 
scarcely exceeding the leaves, finely and sparingly villous; hypanthium slightly villous, in 
fruit about 5 mm. in diameters bractlets linear-oblong, obtuse, about 3 mm. long, about a 
third shorter than the ovate-lanceolate sepals; petals unknown ; pistils rather few; styles 
filiform. 
TYPE LOCALITY : White Mountains, New Mexico. 
DISTRIBUTION: Known only from the type locality, 
ILLUSTRATION: Mem. Dep. Bot. Columbia Univ. 2: pl. 18, f. 3-5. 
82. Potentilla maculata Pourret, Mém. Acad. Toulouse 3: 326. 1788. 
Potentilla verna I. Sp. Pl. 498, in part. 1753. 
Potentilla opaca La Peyr. Hist. Abr. Pl. Pyr. 288. 1813. 
Potentilla salisburgensis T. & G. Fl. N. Am. 1: 440. 1840. 
? Potentilla ciliata Raf. Aut. Bot. 163. 1840. 
Potentilla aurea B Durand, Jour. Acad. Phila. 1856: 191. 1856. 
ene maculata firma Lange, Consp. Fl. Groenl. 235. 1887. Not P. maculata firma Lehm 
Potentilla rubens Rydb. Bull. Torrey Club 23: 395. 1896. Not P. rubens Vill. 1789, 
Stems from a creeping rootstock, about 2 dm. high, somewhat villous-puberulent, 
branched, the branches generally erect; stipules 0.5-1 cm. long, ovate, usually obtuse 
and subentire; basal and lower cauline leaves digitate, of 5 leaflets, the upper ternate, all 
glabrous with ciliate margins and veins beneath, the basal ones with somewhat hairy 
petioles, which are 5-7 cm. long; leaflets obovate, deeply toothed toward the ends with 
rounded obtuse teeth; pedicels erect; hypanthium finely villous-hirsute, in fruit 5-7 mm. 
in diameter; bractlets oblong, obtuse, 2-3 mm. long, much shorter than the broadly ovate, 
acute or obtuse sepals, which are 3-4 mm. long; petals obcordate, 5-7 mm. long; stamens 
about 20; pistils many; styles filiform. 
TYPE LOCALITY: Pyrenees ? . ; 
DISTRIBUTION : Arctic and subarctic Europe and Asia, the Alps, and in America from Green- 
land and Grinnell Land to Labrador and James Bay. 
ILLUSTRATIONS: Engl. Bot. p/. 561; Fl, Dan. pl. 114, Sturm, Deuts. Fl. 17: p/. 5; Jacq. 
Ic. Pl. Rar. 3: pl. 490; Britt. & Brown, Ill. Fl. 7. 1915; Mem. Dep. Bot. Columbia Univ. 2: fi. 
19, f. 1-5. 
83. Potentilla Langeana Rydb. Bull. Torrey Club 28: 199. 1901. 
Potentilla maculata hirta Lange, Consp. Fl. Groenl.6. 1880. Not P. kirial,. 1753. 
Perennial, with cespitose rootstock; stems erect or ascending, 2-3 dm. high, 
sparingly hirsute, with erect branches; basal leaves digitately 5-foliolate; stipules large, 
adnate, lanceolate, 1-2 cm. long; petioles 3-8 cm. long, sparingly hirsute; leaflets cuneate- 
obovate, more or less densely silky-hirsute on both sides, 1-3 cm. long, coarsely toothed 
above the middle with oblong-ovate obtuse teeth, the cuneate base entire ; lower stem-leaves 
similar but smaller and short-petioled ; upper stem-leaves ternate or simple and subsessile ; 
stipules ovate, acutish, about 1 cm. long; cyme 3-7-flowered ; hypanthium silky-hirsute ; 
bractlets oblong to lanceolate, acute or obtuse, about one fourth shorter than the lanceolate 
sepals, which are 4-5 mm. long; petals broadly obcordate, 7-8 mm. long; stamens about 
20; pistils many; styles filiform. 
TYPE LOCALITY : Amaralik Fjord, Greenland. 
DISTRIBUTION: Greenland. 
84. Potentilla Vreelandii Rydberg, sp. nov. 
Perennial, with a rootstock and short caudex; stems ascending, 1.5-2 dm. high, gla- 
brous and straw-colored below, sparingly pubescent above; basal leaves 5-foliolate, digitate, 
