214 PROCEEDINGS OF THE AMERICAN ACADEMY 



glabrum vel glabratum, sutura aut neutra ant rarius ventrali solum 

 intus subintroflexa. 



* Radix annua. Legumen baud stipitatum, baud maculoso-pictum. 



Flores parvi, ochroleuci vel purpurascentes. — Humiles : foliola 

 linearia seu lineari-oblonga, striguloso-cinerea. 



58. A. TRiFLORUS, Gray, PI. Wrigbt. 2, p. 45. Phaca trijiora, 

 DC. Astrag. t. 1 ? P. Gaadolliana, H.B.K. Nov. Gen. & Sp. 6, p. 

 495, t. 586. A basi ramosissimus ; floribus in pedunculo 3-15 ocbro- 

 leuco-purpurascentibus ; legumine ovali obtuse vel acutiusculo (7-12 

 lin. longo). — Arizona and Mexico. Legumes larger and more inflated 

 in specimens from the northern stations, otherwise like the Mexican 

 specimens. The specific name not appropriate. 



59. A. Geteri. Phaca anmia, Geyer in Hook. Lond. Jour. Bot. 

 6, p. 213. Simplicior ; floribus in pedunculo paucis luteo-albis ; legu- 

 mine ovato-lunato acumine incurvo (lin. 8-9 longo). — Drift-sand 

 plains of the Upper Platte, Geyer. Said also to have been collected 

 by Douglas and by Gordon. The crescentic outline and sharp acumi- 



"nation of the leo^ume distinguishes this from the last. The leaflets are 

 linear. There is an obscure A. annuus. 



* * Radix filiformis, aut annua? aut perennis (in A. Hooherianus adhuc 



ignota). Legumen maculosum, in albido seu viridulo purpureo- 

 pictum, stipite brevi calycem adtequante sustentum. Flores in 

 pedunculo pauci, parvuli, albo-rosei seu pallidi ; carina apice in- 

 flexo subproducto. 



60. A. PICTUS. Phaca longifolia, Torr. & Gray, Fl. & P. picta, 

 Gray. Pube sericeo-strigulosa canescens, arenicolus ; radice tenuis- 

 sima (ut videtur nunc annua, nunc forte perenni surculos filiformes 

 subterraneos proferente) ; stipulis subulatis rigidis persistentibus ad- 

 versus folium basi connatis ; foliolis anguste linearibus seu filiformibus, 

 plerisque scepius abortivis petiolo persistente folium filiforme mentiente ; 

 legumine pendulo ovoideo vix apiculato. — Nebraska and New Mexico, 

 in drift-sand, " binding the sand-hills with its long filiform roots." — The 

 name flifolius, which I had applied to one form of this species (see 

 below) on remanding it to the genus Astragalus, is preoccupied by 

 Clos in the Flora Chilena. That of pictus, so appropriate for the 

 legume, may be adopted ; for " A. pictus, Steud." is merely a name to 

 replace "^. bicolor, Desf. Cat. addend.," of which no character was ever 

 published, which has been overlooked in the Flora Chilena, and is 



