56 PROCEEDINGS OP THE AMERICAN ACADEMY 



extus prominulis. — Foot-hills of Gore Mountains, Colorado, H. N. 

 Patterson. Rio McElmo, Southwestern Colorado, T. S. Brandegee, in 

 Haydeii's Expedition, 1875. Utah on Dirty-Devil River, and near 

 Richfield, L. F. Ward, in Powell's Expedition, 1875. The two last in 

 fruit only ; while the fruit of Mr. Patterson's plant (who alone has 

 found the flowers) is decidedly smaller, sometimes little over half an 

 inch lonw. 



Astragalus subcompressus. A. racemoso sect. Galegiformhim 

 admodum siniilis ; dentibus calycis brevioribus ; corolla ochroleuca ; 

 legumine falcato lateraliter compresso intus septo completo bilocellato, 

 sulco dorsali angusto subclauso, stipite e calycis tubo baud exserto. — 

 S. W. Colorado, common at the altitude of 7,000 feet, T. S. Brandegee, 

 in Haydeu's Exped. 1875. Legumes an inch and a quarter or only 

 an inch long, 2\ to nearly 3 lines wide, the well-developed ones 

 decidedly falcate ; the partition about twice the length of the depth of 

 the groove, which in the cross-section of the well-grown pod before 

 dehiscence is oval and almost closed. 



Astragalus ITaydknianus. A. bisulcato affinis, minor; pube 

 magis cinerea ; spica elongata virgata ; floribus multo minoribus (lin. 

 3-4 longis) ; calycis dentibus subulatis tubo multo brevioribus ; corolla 

 alba, carina apice purpureo tincta ; legumine ovali utrinque obtusissimo 

 venis transversis ruguloso 6-7-ovulato 2-4-spermo, facie ventrali late 

 profundeque impressa sutura ccstteformi valde piominente percursa, 

 stipite calycem hand superante. — Common in S. W. Colorado, at the 

 altitude of 7,000 feet, T. S. Brandegee, in Hayden's Expedition, 1875. 

 Also banks of Grand River in Middle Park, II. N. Patterson. " Plant 

 2 or 3 feet high." Dedicated to Dr. F. V. Hayden, the Director of 

 the expedition in wliich it was collected, and the distinguished ex- 

 plorer and surveyor of our whole Rocky Mountain district. 



Astragalus tricarinatus. A. arrccto subsimilis, 1-2-pedalis ; 

 foliolis plnrimis parvis (lin. 3-4 longis) ovalibus obovatisve emarjiinatis 

 crassiusculis supra glabellis subtus cauo-puberulis secus rhachin elon- 

 gatam sat rigidam sparsis vel remotiusculis ; racemis sparsifloris longe 

 pedunculati:^ ; bracteis ovato-subulatis minimis ; floribus subpatentibus ; 

 calycis nigro-hirsutuli tubo brevi-campanulato pe^licello aequilongo 

 dentibus subulatis parura longiore ; corolla ochroleuca sen flavida (semi- 

 pollicem longa) ; ovario glaberrimo ; legumine lato-lineari, matnro 

 arcuato ultrapollicari coriaceo bilocellato quasi tiicarinato, nempe dorso 

 inter carinas obtusas late sulcato, ventre acutissime carinato, faciebus 

 concavis, sectione transversa late Y-formi, stipite calycis tubo breviore. 

 — White Water, San Bernardino Co., California, Parry, 1876. 



