I92 GREENE 



fruiting panicle open, large, oblong-fusiform, 15-25 cm. long, 

 recurved, its branches coarsely pubescent : drupelets little com- 

 pressed, 3 mm. wide. 



Calientes, Nevada, 1902, L. N. Goodding. No specimens 

 seen by the writer, but by the description the species must be 

 distinct enough, and probably local in southern Nevada. 



23. RHUS ARGUTA, sp. nov. 



Shrub said to be 1-3 m. high, the branches stoutish, smooth, 

 glabrous, glaucous even in full maturity ; leaves notably ascend- 

 ing rather than spreading, 3 dm. long, the petiole uncommonly 

 elongated and, like the rachis, very glaucous; leaflets 17 or 19, 

 narrowly oblong-linear or subfalcate, 6-8 cm. long, sessile by 

 an acutish base, closely, sharply and saliently serrate, the ser- 

 ratures 15 or 16 on a side, the acumination long and narrow, 

 upper face deep green but dull, the transverse veins conspicu- 

 ously paler, lower face very glaucous : panicle not large, 10-12 

 cm. high, pyramidal, its branches hirsutulous ; drupelets of the 

 largest. 



Species of the Pacific slope, apparently common in the 

 Columbia River region, at least eastward ; very possibly an 

 aggregate, resolvable into several ; but the type of the above 

 diagnosis is from Rhea Creek, Morrow County, Oregon, and 

 was collected by J. B. Leiberg, September 11, 1894, his No. 

 893 as in U. S. Herbarium. The following, all from western 

 Washington, are more or less true to this type : sheet 93075 in 

 Herbarium Field Museum, from near Spokane, in flower only ; 

 sheet 93076 of the same, from the same region with lax pyram- 

 idal panicle very much larger, leaflets larger, greener on both 

 faces and by no means sharply serrate ; A. D. E. Elmer, 

 Wawawai, 1897 ; Frank Kreager, Spokane County, 1902 ; 

 Sandberg & Leiberg, Rock Island, 1893, and Robert Horner, 

 Waitsburg, 1897, these last all as in U. S. Herbarium, likewise 

 from Idaho, A. A. Heller, Nez Perces County, 1896, his No. 

 3421. This is quite true to the type as to foliage, but in flower 

 only; a fruiting specimen, from Salmon River, Vernon Bailey, 

 1895, with leaflets not so typical. 



