Nevada, L'tah, and ^[rlzona. 77 



Potentilla purpurascens pinetorum vtir. uov. 



Plant caispitose from a many-branched caudex ; steniH al)()iit 

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

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

 divided, the divisions often 2-lobed ; upper leaflets merely 2- 

 lobed ; divisions in both ol)long-oljlaneeolate, glabrous or very 

 scantily villous ; otherwise as the type form. 



In aspect our plant is quite different from Rothrock's s[)eci- 

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

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

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

 following references to Potentdla jxirpurascens may ])e helpful: 

 Wats. Proc. Amer. Acad. XI 148 (1870) under Horkdia ; 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 a1)undant throughout the valley of the nort'n 

 fork of Kern River, in forests of Plnas jcffr'cyi, along the rather 

 dry margins of meadows. Rothrock's came from a higher alti- 

 tude, 9,000 feet, " 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 m. high ; bark dark gray after the first year ; 

 In'anches divaricate, closely interlocking, the ultimate Ijanchlets 

 always spinescent ; leaves 8 to 14 mmi 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 i)oint ; wing ob- 

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

 seed not developed. 



The plant difters from S. vermiadata-v in its smaller size, always 

 spinescent branchlets, intricate and compact growth, smaller and 



*Bot. Wheeler Surv., 1870, pi. III. 



