Parr 4, 1908] ROSACEAE 327 
88. Potentilla perdissecta Rydberg, sp. nov. 
Potentilla decurrens Rydb. Bull. Torrey Club 23: 396, mainly. 1896. Not P. dissecta decurrens 
S. Wats. 1873. 
Perennial, with a short cespitose caudex; stems 0.5-2 dm. high, when young slightly 
silky-strigose, glabrate in age; stipules ovate, acute; basal leaves palmately or rarely pin- 
nately 5-7-foliolate, thick and somewhat coriaceous, with ribs prominent beneath; leaflets. 
1-3 cm. long, obovate in outline, the twolower much smaller, all deeply cleft into oblong or 
lanceolate acute divisions, glabrous or nearly so, shining; hypanthium silky-villous, in fruit. 
about 5 mm. in diameter; bractlets oblong, obtuse, much shorter than the ovate-lanceolate 
acute sepals, which are 4-5 mm. long; petals obcordate, much longer than the sepals, 5~& 
mm. long; stamens 20; pistils many; styles filiform. 
Type collected on Spanish Peaks, Madison Range, Montana, July, 1896, Flodman 572 (herb. 
N. Y. Bot. Gard.). 
DISTRIBUTION : High mountains from Alberta and British Columbia to Wyoming and Utah. 
ILLUSTRATION : Mem. Dep. Bot. Columbia Univ. 2: pl. 20, f. 1-5 (as P. decurrens). 
89. Potentilla multisecta (S. Wats.) Rydb. Bull. Torrey 
Club 23: 397. 1806. 
Potentilla diversifolia multisecta S. Wats. Bot. King’s Expl. 86. 1871. 
Potentilia dissecta multisecta S. Wats. Proc. Am. Acad. 8: 557. 1873, 
Perennial, with a short caudex; stem erect, slender, 1-2 dm. high, more or less silky- 
strigose; stipules ovate-lanceolate, acute, about 5 mm. long; basal leaves with petioles 5-10 
cm. long, more or less silky, digitate or pinnate with approximate leaflets; leaflets 3-7, the 
lower smaller, all dissected into linear or linear-oblong divisions; stem-leaves much 
reduced and few; hypanthium silky, in fruit 4-5 mm, in diameter; bractlets and sepals 
oblong-lanceolate, acute, nearly equal, 3-4 mm. long; petals obcordate, about one half 
longer than the sepals; stamens 20; pistils many; styles filiform. 
TYPE LOCALITY: East Humboldt Mountains, Nevada. . ' . 
DISTRIBUTION: High mountains from Montana and British Columbia to Wyoming and 
Nevada. 
ILLUSTRATION : Mem. Dep. Bot. Columbia Univ. 2: p/. 20, f. 6-10. 
XX. Subviscosae. Perennial, with a deep thick root. Stems many, short, spreading, 
with divergent branches. Leaves silky or hirsute, not at all tomentose. Petals yellow, 
obcordate, and often inclined to be slightly unguiculate, exceeding the calyx. Bractlets 
and sepals incurved in fruit and enclosing the comparatively few and large achenes. Styles 
filiform and very slender. 
90. Potentilla Wheeleri S. Wats. Proc. Am. Acad. 11: 148. 1876. 
Perennial; stems many from the caudex, 5-20 cm. long, spreading or decumbent, 
branched and many-flowered, silky-villous; stipules ovate, acute, subentire; basal leaves 
many, with petioles 2-6 cm. long, digitate, of 5 leaflets, equally silky on both sides; leaflets 
cuneate to obovate, crenate at the rounded summit, 1-2.5 cm. long; stem-leaves smaller 
and often ternate; hypanthium silky-villous, in fruit 5-7 mm. in diameter; bractlets ob- 
long, obtuse, 1.5-2 mm. long; sepals ovate, rather acutish, 2-3 mm. long, inflexed in fruit ; 
petals obcordate, a little exceeding the calyx ; stamens 20; pistils about 20; styles filiform. 
TyPE LOCALITY : Sierra Nevada, about the headwaters of Kern River. : : 
DISTRIBUTION : Mountain valleys of central and southern California and Lower California. 
ILLUSTRATIONS: Rothrock, Wheeler Surv. £/.3, f. B ; Mem. Dep. Bot. Columbia Univ. 2: pl. 
16, f. 1-5. 
91. Potentilla viscidula Rydberg, sp. nov. 
Potentilla Wheeleri viscidula Rydb. Bull, Torrey Club 23: 429. 1896. 
Perennial, with a tap-root and short erect caudex ; stems erect or ascending, 5 cm. or 
less high, hirsute ; basal leaves 5-foliolate, hirsute and green on both sides, often also more 
or less glandular-granuliferous ; petioles 1-2 cm. long, hirsute; leaflets broadly obo- 
vate, 5-10 mm. long, coarsely serrate with ovate teeth ; stem-leaves small and reduced, 
3-foliolate or 1-foliolate; stipules lanceolate ; inflorescence 1-4-flowered ; pedicels, hypan- 
