200 PROCEEDINGS OF THE AMERICAN ACADEMY 



etc.) cinereo-hirsntulis. — Arkansas and Texas to Arizona. Flowei'S 

 varying from violet-purple to whitish. 



23. A. LEPTOCARPUS, Torn & Gray, Fl. 1, p. 334. Subglaber ; 

 leguminibus rectis patentibus minus reticulatis glabris. — Arkansas and 

 Texas. — Corolla 4 or 5 lines long, curved, violet or violet-tipped, the 

 keel produced into a narrower apex. Legume an inch long, thin-walled. 



§ 10. Succumhentes. Legumen chartaceo-coriaceum, baud stipitatum, 

 lineari-elongatum, valde compressum, sursum falcatum, dorso bica- 

 rinatum sulco profundo, sutura intrusa ventralem extus prorainu- 

 1am acutam attingente bilocellatum, sectione transversali Y-formi. 

 — Caules humiles, diffusi, flexuosi ; pedunculis brevibus ; stipulis 

 discretis liberis. Flores majusculi, laxiuscule subcapitati, pur- 

 purascentes ; calyce cylindrico. 



24. A. succuMBENS, Dougl. in Hook. Fl. Bor.-Am. 1, p. 151. 

 Cinereo-liirsutus ; foliolis obovatis ; leguminibus arrectis nitidis eximie 

 reticulatis rete transversa. — Interior of Oregon, on bai'ren grounds of 

 the Columbia and "Wallawallah. — Flowers narrow, three fourths of an 

 inch long. Legumes from one to two inches long. 



§ 11. Galegiformes. Legumen stipitatum e calyce exsertum, cum flore 

 pendulum, coriaceo- vel cartilagineo-chartaceum, rectum, pi. m. 

 trigonum, in nostris angustum, postice maxime sulcatum, sutura 

 dorsali intrusa semi- vel fere bilocellatum. — Caules foliosissimi, e 

 radice perenni erecti, validi, sulcati ; stipulis discretis liberis. 

 Eacemi elongati confertitiori. Flores majusculi, albi vel ochro- 

 leuci (carina tantum purpureo tincta). 



* Calyx basi vix gibbosus, nigricanti-pilosus. 



25. A. Drummondii, Dougl. in Hook. Fl. Bor.-Am. 1, p. 153, t. 57. 

 Molliter villosus, albiflorus ; calycis dentibus subulatis tubo brevioribus ; 

 legumine glaberrimo lineari-elongato tereti-biventricoso, sulco angusto 

 profundissimo, sectione transversali obcordato-biloba, stipite calycis 

 dentes superante. — Saskatchawan or Hudson's Bay to Nebraska and 

 the Rocky Mountains. — Legume completely or incompletely divided 

 by the intrusion of the dorsal suture. 



* * Calyx basi valde gibbosus. 



26. A. RACEMOSUS, Pursh, Fl. 2, p. 740. A. galegoides, Nutt. 

 Gen. Appresse pubescens, glabratus, albiflorus ; calycis albido-pube- 

 ruli dentibus setaceis tubo paullo brevioribus stipitem adteqantibus ; 

 legumine glaberrimo lanceolato-oblongo triquetro. — Plains of Nebraska 



