Characters of some New Plants of California and Nevada, 

 chiefly from the Collections of Professor William H. Brewer, 

 Botanist of the State Geological Survey of California, 

 and of Dr. Charles L. Anderson, with revisions of certain 

 Genera or Groups. By Asa Gray. 



The diagnoses of two or three of the following species, of the col- 

 lections of 18G0-1862, have already been published in the Proceed- 

 ings of the California Academy of Natural Sciences, Vol. 3, pp. 

 101-103. The plants described are from the collections of the Geo- 

 logical Survey when not otherwise specified. 



Arabis (Lomaspora) platysperma: humilis e basi sufFrutes- 

 cente ; foliis cum caule pube stellata canescentibus spathulatis integer- 

 rimis, summis oblongis arete sessilibus obtusis ; racemo paucifloro ; 

 (petalis roseis;) siliquis arrectis rectisque lato-linearibus (l2--2| poll, 

 longis, lin. 2^ latis) acuminatis planis, valvis laxe reticulatis ; stigmate 

 sessili; seminibus amphssime alatis. — Sierra Nevada, on Mount Dana, 

 alt. 13,227 feet, and above Ebbett's Pass. 



Streptanthus polygaliodes : Eucilsia, Dipterochlcena, glaber, 

 paniculato-ramosus ; foliis filiformibus integerrimis, nonnuhs • basi sub- 

 amplexante sagittatis ; racemis spiciformibus ; calyce luteo petala pur- 

 purascentia subaequante, sepalis duo exterioribus maxime dilatatis sub- 

 cordato-rotundatis, interioribus oblongo-lanceolatis acuminatis ; siliquis 

 (immaturis) angustissime linearibus stylo brevi apiculatis. — On very 

 dry hillsides, in serpentine soil, along the Tuolumne River. A re- 

 markable species, with the petals, &c., of the Euclisia section, but, on 

 account of its peculiar calyx, rather to be distinguished as of a separate 

 section. The light- yellow and ajiparently scarious petaloid sepals are 

 of two very different shapes ; the inner pair nearly as in other species of 

 the genus ; but the outer much dilated, apparently nearly flat, and not 

 unlike the wings of some species of Polygala, about 3 lines in length and 

 breadth, and as it were enclosing the rest of the flower ; the tips of the 

 purplish or white and purple petals, and the oblong-sagittate blunt 

 anthers barely exserted. A pair of the filaments frequently connate. 

 The plant is probably an annual. 



Streptanthus procerus. Brewer. S. flave$cens,[GYa.j, in Pro-, 

 ceed. Amer. Acad. 6, p. 186, as to the "very large or luxuriant form 



