Part 4, 1908] ROSACEAE 343 
XXX. Multijugae. Perennials, with a very short rootstock and a deep root. Stem 
erect, ascending or prostrate, usually less than 3 dm. high. Leaves hirsute or strigose, 
not tomentose, pinnate, with 3-13 pairs (in P. Drummond sometimes only 1 or 2 pairs) 
of coarsely toothed or dissected leaflets. Petals yellow or white, obcordate. Styles long 
and slender, usually filiform. ; 
145. Potentilla klamathensis Rydberg, sp. nov. 
Perennial, with a tap-root and short caudex; stems diffuse or ascending, slender, 1-2 
dm. high, sparingly and loosely ciliate with at first ascending and soon spreading hairs, 
slightly exceeding the basal leaves; basal leaves 1-1.5 dm. long, pinnate, with 13-21 
leaflets ; leaflets 1-2 cm. long, dissected into linear acute segments, loosely hairy; stem- 
leaves reduced ; stipules lanceolate, acuminate ; inflorescence 1-5-flowered ; pedicels 1-2 em. 
long, in fruit arcuate-spreading and often abruptly curved below the hypanthium ; bractlets 
linear-oblong or linear-lanceolate, acute, 3 mm. long, or in fruit 5 mm. long; sepals 
linear-lanceolate, acute, 5 mm. long, in fruit 6-7 mm. long; petals yellow! about 7 mm. 
long, obovate, emarginate; stamens about 20; styles filiform. 
Type collected near Fort Klamath, in 1804, J. B. Leiberg 660 (U. S. Nat. Herb. mo. 282827). 
DISTRIBUTION : Klamath and Goose Lake valleys of Oregon and California. 
146. Potentilla millefolia Rydb. Bull. Torrey Club 23: 433. 1896. 
Potentilla plaitensis Greene, Fl, Fran. 1: 64. 1891. Not P. plattensis Nutt. 1840. 
Low, prostate or spreading perennial; stems numerous from the caudex, about 1 dm. 
long, few-leaved, only a little exceeding the basal leaves, appressed-strigose, often spar- 
ingly so; lower stipules lanceolate, scarious and brown, the upper ovate-lanceolate, 
acute or acuminate, green, often 2-3-cleft; basal leaves pinnate, of many leaflets, sparingly 
strigose-ciliate, nearly as long as the stems; stem-leaves much reduced; leaflets divided 
nearly to the base into linear-subulate divisions, which therefore look as if verticillate; 
pedicels slender, 1-2 cm. long, in fruit abruptly reflexed below the strigose-hirsute hypan- 
thium; bractlets and sepals lanceolate, acute, the former slightly smaller, sometimes 
3-lobed, about 5 mm. long; corolla 12-18 mm. in diameter; petals obcordate, deeply 
notched, longer than the sepals; stamens about 20; achene smooth, with a slender filiform 
nearly terminal style. 
TYPE LOCALITY : California. . . 
DISTRIBUTION : Mountains of California. . . 
ILLUSTRATIONS: Bull. Torrey Club 23: £/. 277, f. 1-5 ; Mem. Dep. Bot. Columbia Univ. 2: i. 
Bf. 15. 
147. Potentilla Hickmani Eastw. Bull. Torrey Club 29: 77. 1902. 
Perennial, with a woody tap-root, and short caudex densely clothed with brown dry 
stipules ; stems low, decumbent, 8-15 cm. long, sparingly strigose ; basal leaves pinnate, with 
usually 13 leaflets, which are almost digitately 3-4-cleft into linear or lanceolate divi- 
sions, 2-8 mm. long, 1-3 mm. wide, glabrous or with a few scattered hairs; stipules lan- 
ceolate or ovate, acuminate, about 5 mm. long; stem-leaves few, with few approximate leat- 
lets; inflorescence 1- or 2-flowered ; pedicels in fruit arcuate-spreading; hypanthium ap- 
pressed-pubescent, 5 mm. broad; bractlets oblong, obtuse, about half as long as the ovate 
sepals, which are 4-5 mm. long; petals yellow, 6 mm. long, obcordate; stamens about 20 ; 
pistils many ; styles filiform. 
TyPE LOCALITY : Forest of Pinus radiata, near the reservoir of Pacific Grove, California. 
DISTRIBUTION: Vicinity of Monterey, California. 
148. Potentilla plattensis Nutt.; T. & G. Fl. N. Am. 1: 439. 1840. 
Potentilla platiensis pedicellata A. Nelson, Bull. Torrey Club 28: 223. 1901. 
Low perennial, 1-2 dm. high, decumbent or spreading, usually with numerous sub- 
simple appressed-strigose stems from the caudex; stipules very large for the size of the 
plant, about 1 cm. long, broadly ovate, subentire and often obtuse; basal leaves many, pin- 
nate ; leaflets 9-17, light-green in color, appressed-strigose or glabrate, obovate-oblong 
