OF ARTS AND SCIENCES: NOVEMBER 11,1863. 219 



the Mt. Diablo range, on dry hills, June 11, in flower and fruit. Dr. 

 Brewer. — A most distinct and striking species, api^arently at least 

 three feet high ; the younger parts white, the older grayish with soft, 

 villous pubescence. Larger leaflets an inch long. Flowers narrow. 

 Legumes an inch and a half to two inches long, in the dried specimens 

 all much flattened laterally and margined by the two nerviform sutures 

 (the ventral one more or less convex), the general outline being nearly 

 semi-obovate with an attenuated base and a sharp-pointed apex : but the 

 pods are evidently inflated in the fresh plant, and therefore more cla- 

 vate. The texture of the walls is that of a thin parchment-like mem- 

 brane. Seeds numerous. Stipe 3 or 4 lines long, pubescent. 



72. A. FRiGiDUS. Phaca frigida, L. Pedalis bipedalisve, subgla- 

 ber; stipulis ovato-oblongis membranaceis ; foliolis 7-9-jugis ovato- 

 oblongis seu elliptico-oblongis viridibus ; pedunculis folium adtequan- 

 tibus ; dentibus calycis abbreviatis ; corolla alba ; legumine oblongo 

 utrinque acutato in stipitem calyce jequilongi vel longiori attenuato 

 nigro-piloso vel in stirp. Amer. glaberrimo. — Rocky Mountains to the 

 Arctic regions and the northern parts of the Old World. 



§ 20. Lonchocarpi. Legumen membranaceum, lanceato-cylindricum, 

 rectum, exserte stipitatum, glabrum, sutura neutra intrusa. Flores 

 raajusculi, calyce cylindraceo. Foliola pauca vel subnulla. 



73. A. LONCHOCARPUS, Torr. & Gray, Bot. Whippl. Exped. in 

 Pacif. R. R. Surv. 4, p. 24 (80). Phaca macrocarpa, Gray, PL Fendl. 

 p. 36. Cinereo-puberulus, glabratus ; caule fistuloso bipedali ramoso 

 e radice perenni ; stipulis discretis parvis ; foliis 1 - 5-foliolatis quan- 

 doque ad rhachin complanato-filiformem reductis ; foliolis filiformi- 

 linearibus remotis ; racemis plurifloris laxis ; bracteis pedicello dimidio 

 brevioribus ; floribus pendulis albis ; dentibus calycis lato-subulatis 

 tubo quadruplo brevioribus ; legumine (sesquipollicari) elongato-cylin- 

 drico, utrinque acutissime acuminato, stipite calycem excedente. — 

 New Mexico, near Santa Fe. 



The plant from the Llano Estacado, with shorter and blunt pods, 

 collected by Dr. Bigelow, and noticed in the Pacific R. R. Survey, above 

 cited, is not included in the character here given. When better known, 

 it may prove to be a second species of this group. 



§ 21. Ilicroci/stei. Legumen membranaceum vel chartaceura, parvum, 

 globosum seu ovatum, vesicario-inflatum, estipitatum, sutura neutra 

 introflexa. — E radice perenni diffusi vel procumbentes, plerique 

 tenelli. Flores parvi, sa^pius pauci. 



