A STUDY OF RHUS GLABRA 193 



Among all these there is nothing of Torrey's Rhus glabra^ 

 var. occidentals. Nearly all that I have seen of Pacific coast 

 material which matches that of the Wilkes Expedition, comes 

 not from Oregon or Washington, but from British Columbia. 



24. RHUS APRICA, sp. nov. 



Dimensions of shrub, and characters of branches unknown : 

 leaves as a whole remarkably broad and short, the leaflets being 

 few and approximate but large, subcoriaceous, deep green 

 above, light green beneath, but without bloom ; leaflets about 

 15, oblong, 6-8 cm. long, obtuse at base and sessile, at apex 

 only cuspidately acute, not acuminate, very evenly and quite 

 distinctly though not sharply serrate, the serratures 10 or n on 

 each margin : panicle pyramidal, small, about 8 cm. high, its 

 branches only sparingly and obscurely villous-pubescent ; drupe- 

 lets rather large. 



Very well marked by its few and large leaflets green on both 

 faces; but known only as collected by M. W. Gorman, on 

 Camas Creek in the Washington State Forest Reserve, August 

 20, 1897. It is said to occupy dry open grassy slopes. The 

 type specimen is in U. S. Herbarium. Its label bears Mr. 

 Gorman's collection number 632. 



25. RHUS OCCIDENT ALIS (Torrey). 



Rhus glabra occidentalis Torr. in Bot. Wilkes' Exp. 257. 



1874. 



Only flowers and young foliage known : leaflets (in what 

 should be the type specimen, U. S. Herbarium sheet No. 19819) 

 11-13, oblong-lanceolate, sessile, notably acuminate, beneath 

 only glaucescent ; the panicle small and very slender peduncled ; 

 even the branch slender, but quite glaucous. 



The label bears, in the handwriting of Asa Gray, the legend, 

 "Okanogan, Wash. Territory." 



The Okanogan region lies partly in Washington and partly in 

 British Columbia, and all the more recent specimens seen by the 

 writer which match the type are from the Canadian part of the 

 region. Sheet 4471 of the Canadian Survey Herbarium, Arrow 



