OF ARTS AND SCIENCES. 369 



Astragalus tetrapterus. Subpedalis e radice pcrenni, fere 

 glaber ; caulibus rigidis tenuiter striatis foliosis ; stipulis subulatis fere 

 liberis ; foliolis 15-21 angusto-linearibus (lin. G-10 loiigis parum lineara 

 latis) ; pedunculis folio adtequantibus ; floribus 5-9 subcapitato-con- 

 gestis erectis ; calycis dentibus setaceo-subulatis tubo oblongo-campan- 

 ulato phis dimidio brevioribus ; corolla alba angusta ^-poUicari ; 

 legumine baud stipitato unilocidari coriaceo-oblongo (pollicari et sesqui- 

 pollicari) arcuato-incurvo eximie tetraquetro-alato polyspeinio, suturis 

 baud intrusis. — Southern Utah, Mrs. Thompson and Capt. Bishop, 

 in flower (1871-73), and now (1877) found by Dr. Palmer in fruit, 

 25 miles north of St. George. Remarkable for the fruit, by which it 

 may be associated with A. pterocarpux, Watson, which has still more 

 developed wings on the middle of the valves ; in the present species 

 both sutures are equally alate-carinate. 



Astragalus humistratus, Gray, var. This, from Mokiak Pass, 

 and the same as Palmer's no. 103 of the 1876 collection, is also the 

 same as Parry's no. 53, of 1874, named A. SonorcB. But it has the 

 fresh or freshened legume obcomptessed as well as arcuate-incurved 

 and with considerable dorsal intrusion, at least below the middle. 

 The original specimen of A. Sonorce is the only one in which the char- 

 acter assigned to the species holds good, and its pods are immature. It 

 seems probable that the latter species may be suppressed, and that the 

 former may vary remarkably in the legume and also in pubescence and 

 length of calyx-teeth. 



Astragalus procerus. /Scy/cx^ar/;?', subglaber ; caulibus robustis 

 2-3-pedalibus ; stipulis parvis triangulatis liberis; foliolis ad 17 ovali- 

 bus (lin. G-18 longis) ; floribus in spicam oblongam confertis nuraerosis 

 patentibus mox deflexis ; calycis dentibus subulato-deltoideis tubo cam- 

 panulato 2-3-plo brevioribus ; corolla ochroleuca (lin. 7 longis) ; legu- 

 mine crasso-coriaceo vesicario turgide dvali pollicari obtusissimo cum 

 mucrone basi subito breviter substipiformi-contracto, suturis nee inoras- 

 satis nee sulcatis. — Near St. Thomas, S. E. Nevada, at the confluence 

 of Muddy River with the Virgen, among underbrush. Dr. Palmer, 

 1877. The legumes and the flowers resemble those of A. Patterson- 

 ianus ; but the foi-mer are much blunter, and the calyx-teeth are very 

 much broader and shorter. 



Astragalus Preussii, Gray in Proc. Am. Acad. vi. 222: var. 

 LAXiFLORUS. Floribus minoribus (|-pollicaribus) in spica subsparsis ; 

 calycis tubo oblongo-campanulato (nee cylindraceo) dentibus vix triplo 

 Ipngiore; corolla in sicco violacea ; legumine minus stipitato. — Beaver- 

 dam, on the Rio Virgen, northwest corner of Arizona, Dr. Palmer 

 VOL. xiii. (n. s. v.) 24 



