OF ARTS AND SCIENCES: NOVEMBER 11, 1863. 199 



locellatum, locellis multiovulatis. — Caulescentes, liumiles vel 

 graciles e radice plerumque annua. Stipulte discrette fere libertB. 

 Flores parvi seu parvuli, violacea seu albida, carina apice incurva 

 vel obtusissima ; calycis tubo brevi. (Species inter se diversie.) 



* Flores numerosi, dense spicati, per anthesin leguminaque deflexi : 

 pedunculi elongati. Pedales et ultrapedales, strigoso-puberuli. 



18. A. VACCARUM, Gray, PI. Wright. 2, p. 43. Cinereo-puberulus ; 

 radice perenni ; calycis dentibus tubo tequilongis ; corolla incurva 

 (alba seu albida nunc post anthesin purpurea) ; leguminibus lanceolato- 

 oblongis arcuatis hirsutulis, sectione transversali late obcordata. — 



o 



Arizona. 



19. A. Hartwegi, Benth. PI. Hartw. p. 10 ; Torr. Bot. Mex. 

 Bound, p. 56. Viridior ; calycis dentibus tubo brevioribus ; corolla 

 fere recta. — Arizona and Mexico. — Legume unknown, but from the 

 enlarging ovary apparently like that of A. vaccarum, which may pass 

 into this. 



* * Flores pauciusculi in racemo laxo, per anthesin leguminaque 



penduli. Humiles, glabelli. 



20. A. CoBREXSis, Gray, PI. Wright, p. 43. DifFusus ; foliolis 

 retusis ; pedicellis tubo calycis vix brevioribus ; corolla purpurascente ; 

 leguminibus obcompressis oblongis rectis dorso late concavis sub-cym- 

 bseformibus. — New Mexico. Ovary short-stipitate, but the legume 

 sessile in the calyx. 



* * * Flores pauci capitati, cum leguminibus oblongis erecti. Corolla 



dentes calycis tubo multo longiores subulato-lineares baud superans. 

 Humiles e radice annua, villoso-hirsuti. 



21. A. Wrightii, Gray, PI. Lindh. 2, p. 176, & PL Wright. 1, 

 p. 51. Legumen rectum, subcompressum, bicarinatum, acutum, calyce 

 dimidio longius ; stylo perbrevi. — Texas. — Very unlikr any other of 

 our species. 



* * * * Flores pauci subcapitati, nunc subsolitarii, parvuli, carina 



vexillo valde breviori apice inflexa pauUo producta. Legumen 

 lineare, subcompressum, dorso bicarinatum. Humiles e radice 

 annua, diffusi ; foliolis plerumque retusis. 



22. A. NuTTALLiANUS, DC. Prodr. 2, p. 289. A. micranthus, 

 Nutt., non Desv. Glabellus vel cinereo-pubescens ; leguminibus juxta 

 basin sursum incurvatis reticulatis aut glabris aut (var. trichocarpus, 



