OF ARTS AND SCIENCES : NOVEMBER 11, 1863. 221 



radice perenni ; stipuHs discretis liberis. Flores mediocres legu- 

 minaque penduli seu patentes. Calycis dentes tubo campanulato 

 vix breviores, setacei. Carina subrecta. 



77. A. Beckwithii, Torr. & Gray, in Pacif. R. R. Surv. 2 (coll. 

 Beckwith), p. 120, t. 3. Glaber, hurailis, diifusus ; foliolis late ovalibus ; 

 floribus in racemo brevissimo 5-8 albis ; legumine ovali (pollicari) 

 subincurvo acumine lato compressissimo apiculato, dorso planiusculo 

 sutura levissime sulcata et intus tumida, ventre impresso sutui-a exserta 

 acutissime marginata. — Utah. The legume described from a fruiting 

 specimen communicated to the late Dr. Darlington bj Capt. J. W. 

 Phelps. — From the dorsal suture forming a slight internal ridge on 

 that side of the cell, while the ventral is altogether externally salient, 

 this would technically fall into the Astragalus rather than the Pliaca 

 series. But the conformation of the legume is more like that of A. 

 hisulcatus than any other. 



78. A. BisuLCATUS, Gray, in Pacif. R. R. Surv. 12, pars 2, (Bot.) 

 p. 38, t. 1, B. Phaca bisu/cata, Hook. Fl. Bor.-Am. 1, p. 145. Strigu- 

 loso-puberulus ; caule erecto ultrapedali valido ; foliolis oblongis stepe 

 angustis, imis stipulis approximatis ; racemis spiciformibus densifloris ; 

 floribus violaceis ; legumine parvulo (semipollicari) recto anguste ob- 

 longo semicylindrico antice profunde bi-excavato. — Plains of Nebraska 

 to the Saskatchawan and to the Rocky Mountains. — The ventral su- 

 ture forms a strong and salient obtuse ridge of the same height as the 

 borders of the deep excavation it divides. 



§ 23. Pectinati. Legumen crasso-cartilagineum epicarpio subcarnoso, 

 subovatum vel oblongum, turgidum, estipitatum, nee antice nee 

 postice sulcatum vel intrusum, suturis crassis utrisque extus 

 prominentibus. — Caules subpedales e radice perenni, foliaque 

 rigidiusculi ; foliolis fere filiformibus rhachi baud articulatis per- 

 sistentibus. Stipulos inferiores adversus folium connata?. Flores 

 elongati (subpollicares) in racemo breviusculo plurimi, albi, carina 

 rectiuscula. 



(From the legume A. microlobus may be sought here.) 



79. A. PECTiNATUS, Dougl. Phaca pectinata, Hook. Fl. Bor.-Am. 

 1, p. 141, t. 54. Puberulo-cinereus, glabratus ; ramis striatis angulatis ; 

 calycis dentibus tubo cylindraceo multo brevioribus ; vexillo elongate ; 

 legumine pendulo glabro (semipollicari) cuspidato, sutura dorsali per- 

 crassa. — Dry plains, Nebraska to Saskatchawan. 



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