Rydberg: Studies on the Rocky Mountain Flora 274 



3—7 cm. long, ovate or ovate-lanceolate in outline, but often hastately 

 lobed at the base, which is broadly cuneate and dccurrent on the 

 slender petiole ; the upper ones smaller and generally not hastate : 

 lower petioles 2—4 cm. long ; flowers in small glomerules in the 

 upper axils and on a slender interrupted terminal spike : seeds 

 brownish black, smooth and shining, about i mm. long. 



This species differs from B. capitatum in the hastate or entire, 



never toothed, thin leaves and in the inflorescence which is more 



inclined to be naked above, more lax and with smaller glomerules. 



It grows at an altitude of 2000—3000 m. 



Wyoming: Buffalo, 1900,/^. Trcir^^', j^p f (type). 



Utah: Alta, Wahsatch Mountains, 1879, M. E. Jones, 



1181. 



Nevada : Above Thousand Springs Valley, 1868, 5. Watson, 



977- 



Alsine Curtisii sp. nov. 



Slender, erect, branched, 2—6 dm. high with a slender horizon- 

 tal rootstock. Stem sharply 4-angled, glabrous, except at the in- 

 florescence : leaves linear or lance-linear strongly i -nerved, sessile, 

 rounded and half clasping at the base, long-attenuate at the apex, 

 3-6 cm. long, 3—5 mm. wide, those of the inflorescence smaller : 

 branches of the many-flowered cymes divergent, very viscid-pubes- 

 cent : sepals about 3 mm. long, thick, ovate-oblong, obtuse or 

 acutish with a narrow white margin : petals about 7 mm. long, 

 cuneate with a broad and deep sinus at the apex : seeds very few, 

 dark brown, almost 2 mm. in diameter. 



This species is nearest related to A. Jamesii and has been con- 

 fused with it ; the differences are mostly in the leaves and sepals. 

 In A. Curtisii the former are scarcely half as wide as those of A. 

 Jamesii, and the sepals of the former are rather thick while in the 

 latter almost membranous. A. Curtisii grows at an altitude of 1800 

 to 3000 m. 



Wyoming : Headwaters of Cliff Creek, 1900, C C Curtis 

 (type). 



Utah : Wahsatch Mountains, 1 869, S. Watson, i^g (in part) ; 

 Beaver Valley, 1877, E. Palmer, ji^i; Alta, Wahsatch Moun- 

 tains, 1879, 3f. E. Jones, 1160. 



Nevada : East Humboldt Mountains, 1868, 5. Watson, ijg (in 

 part). 



Arizona: Mogallon Mountains, 1881, //. H. Rushy. 



