1 



Osterhout: New Plants from Colorado 



257 



a stout peduncle terminating the stem or branch and cnduig in an 

 oblong head of white flowers. : flowers upright, 2 cm. long, sub- 

 tended by conspicuous, spatulate, green bracts : calyx pubescent 



with w^hite hairs, 6-^] 



mm. long, the slender 



linear teeth of the 



same length : lower stipules small, sheathing the stem, the uppei 



foliaceous and about i cm. long. 



The leaves and fruit are similar 



Hyp 



The variety is readily distinguished from the typical form by 

 the white flowers and spatulate green bracts, even fruiting speci- 

 mens being readily recognized by the latter. It is described from 



specimens 



J 



and again in 



i8q8 along the 



Laramie river in Wyoming, about one half mile north of Colorado. 

 It is referred to in Prof. Aven Nelson's First Report on the Flora 

 of Wyoming under Astragalus Ilypoglottis L. as *^ specimens with 

 ochroleucous flowers '' no. 775. Prof. Nelson has also collected it 

 at other stations in Wyoming. 



New Windsor, Colorado. 



