836 PROCEEDINGS OF THE AMERICAN ACADEMY 



minuta praesertim calycis albescens ; pedunculis haud divaricatis 

 bi-tripollicai-ibus; spicis virgatis laxe 25 - 40-flori.s ; calycis dentibus 

 ovato-oblongis, infimo paullo longiore. — Fort Mobave, on gravelly 

 hills, Dr. J. G. Cooper. " Stems two or three feet high : flowers dark 

 purple." Except for the minute hoary pubescence and other minor 

 particulars, this would seem to be Bentham's D. divaricata, from tbe 

 coast of Lower California (and a comparison of specimens made at 

 Kew discloses no specific differences). There is nothing divaricate in 

 the specimens, however. 



Petalostemon foliosus : undique glaber; caulibus crebre folio- 

 sis; foliolis 8-14- (saspius 12-) jugis lineari-oblongis mucrone cuspi- 

 datis, glandulis paucis parvis ; spica cylindrica brevi-pedunculata ; 

 bracteis aristatis e basi lanceolata ; calycis dentibus subaaqualibus tubo 

 cylindraceo dimidio brevioribus ; floribus roseo-purpureis. — Banks of 

 Fox River, Kane Co., Illinois, Burgess Truesdell, 1867. Also near 

 Nashville, Tennessee, Mr. Hatch, 1854. A well-marked species, 

 which has been singularly overlooked, or else is very local. It a has 

 the habit of P. villosus, but with yet more numerous leaflets, and is 

 glabrous throughout, even to the ovary. The very numerous and equa- 

 ble leaflets, thicker spikes with more exserted bracts, shorter calyx- 

 teeth, &c, no less than the color of the flowers, distinguish it at once 

 from P. candidus. Both ovules are apt to be fertile in this and the 

 last-named species. 



Astragalus malacus : undique molliter villosus ; caulibus e 

 caudice perenni gracili erectis 2-3-foliatis (spithamaBis vel pedali- 

 bus) ; foliolis 6-7-jugis obovatis retusis ; pedunculis folia superantibus 

 spicam multifloram demum laxifloram gerentibus ; calycis tubo cylin- 

 drico dentibus setaceo-subulatis triplo longioribus ; corolla loete pur- 

 purea ; legumine oblongo-lanceolato arcuato haud stipitato crebre 

 mollissime villoso tenuiter coriaceo subcompresso sutura dorsali (extus 

 leviter sulcata) usque ad ventralem acute marginatam intrusa bilocellato 

 polyspermo (sectione transversa auguste obcordata). — Nevada, near 

 Carson City, Dr. C. L. Anderson. I formerly confounded an imper- 

 fect specimen of this with A. Parryi, Gray ; and I know of no other 

 more nearly related to it. But it is more softly villous, and usually 

 more caulescent, has far longer peduncles, and spikes of bright purple 

 or violet flowers, in a raceme which at length elongates, often to the 

 length of 4 inches, the tube of the calyx is longer and narrower (flower 

 over half an inch long) ; and the very villous legumes are thinner, 



