232 PROCEEDINGS OP THE AMERICAN ACADEMY 



107. A. TRipnTLLUS, Pursh, Fl. 2, p. 740. Phaca ccespitosa, Nutt. 

 Gen. ; Hook. Fl. Bor.-Am. t. 55. P. argophylla, Nutt. in Torr. & Gray, 

 1. c. Acaulescens, nititlo-sericeus ; stijiulis hjalinis glabris ; foliis pri- 

 mariis quandoque 5-foliolatis foliolis cuneato-oblanceolatis, sequentibus 

 longe petiolatis foliola 3 longiora lanceolata gerentibus flores (poUicares) 

 sessiles confei'tos superantibus ; calycis denlibus tubo cylindrico diraidio 

 brevioribus ; corolla ochroleuca sen alba ; legumine villoso calyce in- 

 cluso. — Plains of Nebraska to the Saskatchawan. — Even the trifolio- 

 late leaves may be seen on close examination to be of the pinnate type, 

 and not of the palmate, as I had supposed. Some of the earlier leaves 

 of the season (which, by their shorter petioles and shorter and broader 

 leaflets, exemplify Nuttall's Phaca argophyUa), moreover, show two 

 pairs of leaflets and a terminal one, crowded indeed, but evidently pin- 

 nate. Pursh's name is to be restored to the species, the homonyme of 

 Pallas being an Oxytropis. 



108. A. SERicoLEtJCUs, Gray, Enum. coll. Parry, in Sill. Jour. n. 

 ser. 33, p. 410, no. 190. Phaca sericea, Nutt. in Torr. & Gray, FL 

 1. c. Latissime crespitosus, sericeo-incanus ; caulibus ramosis prostratis ; 

 ramis stipulis villosis obtectis ; foliis omnibus trifoliolatis pedunculos 

 fihformes 2 - 6-floros baud lequantibus ; foliolis oblanceolatis cuneato- 

 oblongisve (lin. 3 longis) ; calycis dentibus tubo campanulato subcequi- 

 longis ;' corolla purpurea (lin. 3-4 longa) ; legumine ovato-oblongo 

 incano calyce semi-incluso (lin. 3 longo). — Sand-hills and clifi^s of the 

 Platte or Nebraska to the Rocky Mountains. 



III. Species anomala, cai'ina in acumen producta Oxytropidis in- 

 star, legumine sutura dorsali (carinali) solum introflexa Astragalorum 

 typicorum. 



109. A. NOTHOXYS, sp. nov. DifFusus e radice annua, cinereo- 

 puberulus ; caulibus gracilibus (3- 12-pollicaribus) ; stipulis fere liberis 

 discretis ; foliolis 6-9-jugis obovato-oblongis oblongisve ssepe retusis 

 supra glabris ; pedunculis folium superantibus ; racemo brevi spici- 

 formi ; calycis dentibus subulatis tubo oblongo brevioribus ; corolla 

 violacea, carina apice lato incurvo in acumen acutissimum desinente ; 

 legumine lato-lineari falcato puberulo tenui-coriaceo dorso sulcato 

 septifero fere bilocellato, sutura *ventrali extus prominula. — Arizona, 

 formerly the northern part of the Mexican province of Sonora, Prof. 

 Thux'ber. San Luis Mountain and Guadaloupe Canon, Capt. E. K. 

 Smith, in herb. Torr. — Leaflets 3 to 6 lines long. Peduncles 3 to 6 



