Part 4, 1908] ROSACEAE 313 
hairs above, more loosely long-hairy beneath; stem-leaves 3 or 4, the lower similar to the 
basal leaves, the upper 3-foliolate; stipules 1-1.5 cm. long, lanceolate, usually toothed ; 
cyme flat-topped ; hypanthium hirsute, in fruit about 6 mm. broad; bractlets lanceolate, 
about 3 mm. long; sepals ovate or lance-ovate, about 5mm. long ; petals obcordate, slightly 
exceeding the sepals; stamens about 20; pistils many; styles filiform. 
_ _ Type collected on granite, moist places, Bear River (alt. 1650 m.), Amador County, California, 
in 1896, Geo. Hansen 1946 (herb. N. Y. Bot. Gard.). 
37. Potentilla macropetala Rydberg, sp. nov. 
Perennial, with a tap-root and short caudex; stem sparingly strigose, ascending or 
decumbent at the base, 24 dm. high; basal leaves usually 5-foliolate; petioles 3-8 cm. 
long, sparingly strigose; leaflets, especially the middle ones, cuneate, coarsely toothed 
above the middle, entire at the base, green, appressed-pubescent on both sides with short 
hairs and sometimes also somewhat puberulent beneath; stem-leaves 2 or 3, ternate, sub- 
sessile ; stipules lanceolate, entire, 1-1.5 cm. long ; inflorescence few-flowered ; hypanthium 
silky, in fruit 8 mm. broad; bractlets linear-lanceolate, 4-5 mm. long; sepals lanceolate or 
ovate-lanceolate, 6-8 mm. long; petals broadly obcordate, 1 cm. long or more; stamens 
about 20; pistils many; styles filiform. 
Type collected at Tillamook, Oregon, 1894, F. E. Lioyd (herb. N. Y. Bot. Gard.). 
DISTRIBUTION : From Oregon south to the Mexican boundary, but rare. 
38. Potentilla Parishii Rydberg, sp. nov. 
Perennial, with a cespitose caudex ; stems slender, 4-6 dm. high, appressed-silky ; basal 
leaves digitately 5-7-foliolate ; petioles 8-15 cm. long, appressed-silky; leaflets obovate or 
obovate-oblanceolate, 2-5 cm. long, green on both sides, appressed-pubescent with short 
hairs on the upper and longer ones on the lower side, cut-toothed nearly halfway to the 
midrib with lanceolate teeth ; stem-leaves similar but short-petioled and with narrower leaf- 
lets, the upper 3-foliolate; cyme open ; stipules lanceolate, acuminate, usually entire; hy- 
panthium hirsute, in fruit 7 mm. broad; bractlets linear-lanceolate, 3-4 mm. long; sepals 
lance-ovate, acuminate, 6-7 mm. long; petals obcordate, about 7 mm. long; stamens 20; 
pistils many; styles filiform. . 
Type collected at Descanso, San Diego County, California, in 1897, 8S. B. Parish 4523 (herb. 
N. Y. Bot. Gard.). . . . : 
DISTRIBUTION : Meadows of southern California; apparently the same species found also in 
the Sierra Nevada. 
39. Potentilla glabrata (Lehm.) Rydberg. 
Potentilla Nuttallit glabrata ehm. Rev. Potent. 89. 1856. 
Perennial, with a short cespitose caudex ; stems slender, 4-6 dm. high; basal leaves digi- 
tately 7-foliolate ; petioles slender, sparingly strigose, 8-15 cm. long; leaflets 2-5 cm. long, 
oblanceolate or obovate-oblanceolate, glabrous except the veins beneath, cut-toothed about 
halfway to the midrib, with lanceolate teeth ; stem-leaves similar but smaller and short- 
petioled, the uppermost 3-foliolate ; inflorescence open ; hypanthium strigose, in fruit 7-8 
mm. wide; bractlets linear or linear-lanceolate, 3-4 mm. long ; sepals ovate, acuminate, 5-7 
mm. long; petals obcordate, slightly exceeding the sepals; stamens abont 20; pistils 
many; styles filiform. 
TYPE LOCALITY: Oregon. : ; 
DISTRIBUTION : Oregon and Washington to western Wyoming. 
40. Potentilla dascia Rydberg, sp. nov. 
Perennial, with a short caudex; stem single, erect, 4-7 dm. high, hirsute; basal leaves 
7-foliolate ; petioles 7-20 cm. long, hirsute; leaflets obovate to oblanceolate, 3-10 cm. long, 
coarsely and rather densely pubescent on both sides and sometimes obscurely tomentose 
beneath, coarsely cut-toothed about halfway to the midrib into lanceolate teeth; lower 
stem-leaves similar; the upper 3-5-foliolate and short-petioled or sessile; stipules lanceo- 
late, 1-2 cm. long, acute, entire; inflorescence open ; hypanthium hirsute, in fruit 7-8 mm. 
