OF ARTS AND SCIENCES: NOVEMBER 11, 1863. 223 



midio brevioribus ; corolla purpurea ; legumine pubescente arcuato- 

 ovato dorso gibboso acuto chartaceo-coriaceo (semipollicari et ultra). — 

 New Mexico, "Wright, Thurber, Bigelow. — Steins only an inch or 

 two in length ; the peduncles at length three inches long. Flowers 

 rather small. 



83. A. ARiDUS, sp. nov. Sericeo-canescens ; caulibus spithamteis e 

 radice annua difFuso-erectis foliosis ; stipulis minutis ; foliolis 5 — 6-jugis 

 oblongis utrinque albo-sericeis ; pedunculis spicato-5 - 8-floris folio 

 brevioribus ; calycis dentibus tubo brevi-campanulato brevioribus ; co- 

 rolla ochroleuca, minima (2 - 2^ lin. longa) ; legumine canescente gib- 

 boso-ovato (semipollicari) tenui-coriaceo inflato. — Interior Californian 

 desert, on the route between the mouth of the Gila River and San 

 Diego, Prof. Thurber. The materials are scanty. Perhaps the 

 species has a truly membranaceous legume, and should rather be 

 associated with A. Thurberi. 



-1— -i— -I— Piloso-sericeus, e radice perenni decumbens ; floribus medi- 

 oci'ibus ; stipulis scariosis adversus folium connatis. 



84. A. SoNOR^, Gray, PI. Wright. 2, p. 44. Caulibus gracilibus 

 decumbenti-diffusis prostratisve ; foliolis 7 - 8-jugis oblongo-linearibus 

 lanceolatisve acutatis pilis valde adpressis utrinque canescenti-sericeis ; 

 pedunculis folio longioribus spicato-8- 12-floris ; calycis dentibus seta- 

 ceis tubo carapanulato aequilongis ; corolla incurva purpurea, carina 

 inflexa apice rostratim producta ; legumine canescenti-puberulo ovato- 

 lunato acuminato turgido (semipollicari) chartaceo-coriaceo, suturis 

 extus prominentibus. — On the borders of Arizona and the Mexican 

 province of Sonora. — Flowers 4 or 5 lines long. 



-1— -)— -i— -1— Glabelli seu pubescentes ; caules e radice perenni adsur- 

 gentes vel erecti, sgepius flexuosi ; stipulis plerumque discretis ; 

 floribus parvis, in unica majusculis ; leguminibus stepe patentibus 

 vel pendulis, stipite brevissimo in calyce occulto. Dentes calycis 

 cinereo- vel nigricanti-pubescens tubo breviores. 



++ Legumina ovali-oblonga, inflata, subpoUicaria, chartaceo-coriaceo. 



85. A. GRACILENTUS. Phaca gracilenta, Gray, PI. Fendl. p. 36. 

 Pube appressa subcanescens, erectus, subpedalis ; foliolis oblongo- 

 linearibus basi attenuatis ; racemis laxifloris ; corolla purpurascente 

 (lin. 4 longa) ; legumine oblongo utrinque obtuso rectiusculo cinereo- 

 pubescente in calyce arete sessili. — Santa Fe, New Mexico, on rocky 

 hills. 



