I96 GREENE 



idal, 12 cm. long : sepals triangular, acute; petals twice as 

 long, oblong, obtuse, the anthers equaling them. 



Type from mountains west of Las Vegas, New Mexico, G. 

 R. Vasey, 1881 ; U. S. Herbarium No. 195 10. Species with 

 most characteristic habit and foliage. 



29. RHUS ASPLENIFOLIA, sp. nov. 



Shrub evidently dwarf or at least low, the leafy branches 

 short, slender, tortuous, glabrous, glaucous : leaves small, 

 about 1.5 dm. long, the rachis slender, deeply and narrowly 

 furrowed and the hairy line obvious ; leaflets only 7-9, pale 

 green above, moderately glaucous beneath, oblong-lanceolate to 

 lanceolate, 3.5-5.5 cm. long; subsessile, acuminate, very irreg- 

 ularly and somewhat incisely serrate, even coarsely so, the 

 serratures now and then so deep and large as to amount to lobes 

 rather than serratures : only a staminate panicle seen, this 

 narrowly pyramidal, 5 cm. long. 



Type from Wolf Creek, Wyoming, July 12, 1896, A. Nelson, 

 distributed to U. S. Herbarium, under No. 2303, mounted on 

 U. S. Herbarium sheet 285144. Manifestly intermediate be- 

 tween the Nebraskan R. cismontana and the characteristic 

 species of Arizona ; the foliage peculiar. 



