230 PROCEEDINGS OF THE AMERICAN ACADEMY 



centi-puberulo. — On both sides of the Rocky Mountains in Colorado 

 Territory, and farther northward. — Corolla 4 or 4|- lines long, ochro- 

 leucous, sometimes with a purplish tinge. 



102. A. DiVERSiFOLius. Homolohus orthocarpus, Nutt. 1. c. Stri- 

 guloso-cinereus ; caulibus diffuso-decumbentibus elongatis (pedalibus) ; 

 petiolis brevibus complanatis 1 - 5-foliolatis ; foliolo terminali seu folio 

 simplici lineari elongato (1 - 2-pollicari) utrinque attenuato ; pedun- 

 culis 1 - 5-floris ; calycis dentibus tubo dimidio brevioribus ; carina 

 falcato-incurva ; legumine oblongo-lineari recto vel subfalcato (^-polli- 

 cari) canescenti-puberulo. — Gravelly plains of Colorado Territory, on 

 both sides of the Rocky Mountains. — Flowers ochroleucous or lurid. 

 — There is an A. orthocarpus of Boissier ; and moreover the pods of 

 this, as of the foregoing species, are often more or less falcate. 



103. A. JUNCEUS. Homolohus junceus, Nutt. 1. c. Striguloso-cine- 

 reus ; caulibus erectis paniculato-ramosis ; petiolis filiforraibus aphyllis, 

 " radicalibus foliola 1-2-juga minima gerentibus " ; pedunculis pauci- 

 floris ; calycis dentibus brevissimus obtusis ; legumine lineari recto 

 canescenti-puberulo. — Colorado Territory, on the head-waters of the 

 Colorado of the West. — The only extant specimen of this in American 

 herbaria, that I can find, is one in Dr. Torrey's herbarium, given by 

 Nuttall, out of flower, and bearing a single legume, which is nearly 

 an inch long. If distinct (and I know not to what other of the group 

 it could be united), it may retain Nuttall's specific name, i\\%A. junceus 

 of Ledebour being a synonyme of A. Stevenianus. 



-t- -1— -i— H— StipulfB scariosiB folium adversus in unum connatae. Le- 

 gumen breve, nunquam stipitatum, oligospermum. Acaulescentes, 

 csespitosi, sericeo-canescentes; foliis simplicibus lanceolato- vel 

 spathulato-linearibus, nonnuUis rare 3 - 5-foliolatis ; scapis folia 

 superantibus plurifloi-is ; corollis purpureis vel roseis. 



104. A. c^SPiTOSUS. Homalohus ccespitosus, hrachycarpus^ & ca- 

 nescens, Nutt. 1. c. Late cfespitans ; scapis 2 - 6-pollicaribus ; racemo 

 spiciformi ; calycis dentibus attenuatis tubo suboequilongis ; carina 

 obtusissiraa vexillo multo breviore ; legumine oblongo seu lato-lanceolato 

 vix curvato (lin. 3-5 longo) subplano. — Dry hills and cliffs of the 

 Platte or Nebraska, towards the Rocky Mountains. — Ovary and 

 legume more or less canescent in Nuttall's specimens of his three 

 species, which are all evidently reducible to one ; while the ovary is 

 glabrous in a specimen collected at Scott's Bluffs by Mr. W. H. Wagner. 



