

86 BOTANY OF THE DEATH VALLEY EXPEDITION. 



Potentilla gracilis rigida (Nutt.) Journ. Acad. Phila. vii. 20 (1834), as P. ru/ida; 

 Wats. Proc. Ainer. Acad. vii. 557 (1873). Type locality, "Towards the sources of 

 the Missouri, and as far down as the old Arikaree village." 



Near Mineral King, Sierra Nevada (No. 1399). 



Potentilla plattensis Nutt. in Torr. &, Gr. Fl. i. 439 (1840). Type locality, 

 "Plains of the Platte." 

 Farewell Gap, Sierra Nevada (No. 1750). Determined by liana Siegfried. 



Potentilla procumbens (L ) Sp. PI. i. 284 (1753), under Sibbaldla; Clairv. Man. 

 (1811). Type locality European. 

 Near Mineral King, Sierra Nevada (No. 1558). 



Potentilla purpurascens pinetorum Covillo, Proc. Biol. Soc. Wash. vii. 77 (1S92). 

 Type locality as given below. 



■'Plant csRSpitose from a many-branched caudex; stems about 3 cm. high - in- 

 florescence loosely eymose; radical leaves very numerous, 7 to 14 cm. long; lower 

 leaflets about 7 mm. long, 2-divided, the divisions often 2-lohed; upper leaflets 

 merely 2-lobed; divisions in both oblong-oblanceolate, glabrous or very scantily 

 villous; otherwise as the type form. 



"In aspect our plant is quite different from Rothrock's specimens of the type form 

 they being but 5 to 16 cm. high, with shorier leaves, and shorter, broader, more con- 

 gested, villous-hirsute leaflets. The characters of the flowers are identical. The 

 following references to Potentilla purpuraaoens may be helpful : Wats. Proc. Amer. 

 Acad. xi. 148 (1876), under Horkelia; Greene, Pittonia, i. 105 (1887). 



"Type specimen in the United States National Herbarium, No. 1571), Death Valley 

 Expedition; collected August 10, 1891, at Trout Meadows, Sierra Nevada, Tulare 

 County, California, by Frederick V. Coville. 



"Our plant was abundant throughout the valley of the north fork of Kern River 

 in forests of Pinus Jeffrey i, along the rather dry margins of meadows. Rothrock's 

 came from a higher altitude, 9,000 feet, 'on the head -waters of Kern River/ and is 

 undoubtedly a derivative form modified by changed conditions." 



Potentilla rivalis millegrana (Eugelm.) in Lehin. Add. Ind. Hort. Hamb. 11 

 (1849), as P. millegrana; Wats. Proc. Amer. Acad. viii. 553 (1873). Type locality, 

 "in America boreali." 



In the Panamint (No. 821) and Grapevine (No. 1763) mountains. The relation of 

 this form to the true P. rivalis seems not to be well understood, but the customary 

 disposal of it as a variety of that species is here followed. 



Potentilla santolinoides (Gray) Proc. Amer. Acad. vi. 531 (1865), under Ivcsia; 

 Greene, Pittonia, i. 106. Type locality, " in the Sierra Nevada." 



In the high Sierra Nevada (Xos. 1623, 212(5). 



Potentilla wheeleri Wats. Proc Amer. Acad. xi. 148 (1876). Typo locality, "in 

 the southern Sierra Nevada, about the head-waters of Kern River, at 8,200 feet alti- 

 tude." Rothrock states further (Bot. Wheeler Surv. 360) that the specimens came 

 from Olancha Peak. 



Whitney Meadows (No. 1672). The petals, it should be noted, are yellow. An 

 excellent figure of this plant is given by Rothrock (loc. cit. pi. iii.). 



Rosa californica Cham. & Schlecht. Linna-a, ii. 35(1827). Type locality, "San 

 Francisco." 



At various points both in the desert and in the mountains (Nos. 289, 828, 1720, 

 1766). The determination of these roses is very unsatisfactory on account of our 

 present knowledge of the genus. 



