160 Rydberg : Studies on the Rocky Mountain Flora 



leaf-blades and smaller flowers. It resembles still more the Euro- 

 pean P. PyrenaicuDi, which has larger petals, 1-2 cm. long, sta- 

 mens much exceeding the ovary and spherical flower-buds. 



Montana : Mountain above Stanton Lake, 1894, R. S. Williams, 

 gc}2 (type in herb. N. Y. Bot. Garden). 



Alberta: Sheep Mountain, i?)g'^, John Macoioi, i026g ; top 

 of Rocky Mountains, 1881, G. M. Dim'scvi. 



Argemone rotundata 



Stem stout, densely and strongly bristly, but otherwise gla- 

 brous : leaves oval in outline ; the cauline ones sessile and broadly 

 auricled, bristly, especially on the veins and margins, round-lobed : 

 flowers short-pedicelled or subsessile : calyx very bristly ; its horns 

 erect or slightly spreading, bristly : petals white, fully 4 cm. long : 

 pod ovoid, very bristly. 



This has been mistaken for A. hispida Gray but is perhaps 

 nearer related to A. intermedia and A. platyccras. From A. hispida 

 it is easily distinguished by the absence of a finer indumentum and 

 by the round-lobed leaves. The latter character also distinguishes 

 it from the other two species mentioned. It is also much more 

 bristly than the two. It grows at an altitude of i 500-1800 m. 



Nevada : Diamond Mountains, July, 1868, .S". Watson, ^7 

 (type in herb. Columbia University). 



Utah : Utah Valley, 1869, S. JJatson, ^g. 



Bicuculla occidentalis 



Perennial with a very short rootstock bearing numerous tubers : 

 scape and leaves perfectly glabrous; petioles of about 1.5 dm. 

 long ; blades twice ternate ; the divisions twice pinnately divided 

 or cleft into linear-oblong lobes, 1-2 cm. long, 3-5 mm. wide : 

 scape about 3 dm. high : raceme simple : sepals oval, about 5 mm. 

 long : petals pink ; the outer about i cm. long ; their spurs about 

 12 mm., divergent, forming with each other an angle of 90° or 

 more ; crest of the inner petals prominent ; capsule fusiform, with 

 the style about 1.5 cm. long. 



This is nearest related to B. cncnllaria, and has been confused 

 with it, but has coarser foliage, more diverging and longer spurs, 

 more prominent crest on the inner petals and the underground parts 

 more gruinose and not scaly. Its range includes parts of Oregon, 

 Washington and eastern Idaho, and it grows on shaded hillsides. 



Washington: West Klickitat county," 1892, W. N. Snksdorf 

 (type in herb. Columbia University). 



