77 



Potentilla purpurascens pinetorum viir. nov. 



Plant ctvspitoso from a many-branched caudcx ; stems about 

 3 cm. high ; intlorescence loosely cymose ; radical leaves very 

 numerous, 7 to 14 cm. long ; lower leaflets about 7 mm. long, 2- 

 divided, the divisions often 2-lobed ; 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 speci- 

 mens of the type form,* they being but 5 to 16 cm. high, with 

 shorter leaves, and shorter, broader, more congested, villous- 

 hirsute leaflets. The characters of the flowers are identical. The 

 following references to Potentilla purpurascens 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. 

 1579, Death Valley Expedition; collected August 10, 1891, at 

 Trout Meadow, 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 alti- 

 tude, 9,000 feet, u on the head-waters of Kern River," and is 

 undoubtedly a derivative form modified by changed conditions. 



Sarcobatus baileyi sp. nov. 



Shrub .5 to 1 in. high ; bark dark gray after the first year ; 

 branches divaricate, closely interlocking, the ultimate banchlets 

 always spinescent ; leaves 8 to 14 mm. long or shorter, pubes- 

 cent, especially near the apex, with short, flattened, branched, 

 reflexed hairs, the later leaves often glabrate in age ; male spike 

 not seen ; fertile spikes infra-axillary on old wood, consisting 

 of 2 female flowers at the base (one often wanting), each in the 

 axil of a leaf, and a terminal spiciform portion of male flowers, 

 the whole axis 1 to 1.5 cm. long; fruit very large ; body 8 to 

 9 mm. long, about 5 mm. broad at its widest point ; wing ob- 

 long-orbicular, erose, 10 to 15 mm. by 8 to 10 mm. in diameter ; 

 seed not developed. 



The plant differs from & vermiculatm in its smaller size, always 

 spinescent branchlets, intricate and compact growth, smaller and 



* Bot. Wheeler Surv., 1876, pi. III. 



