2"^ LEGUMlNOSJi. Astragalus. 



cartilaginous and thick-walled, obtuse at both ends, abruptly pointed with the per- 

 sisteiit^base of the style, one-celled, both sutures strong and prominent externally : 

 seeds numerous. — Bot. King Exp. 74. 



West Humboldt Mouiitiiins, Nevada, IValson. Allied to A. pedinaim but very distinct. 

 Leallcts not rigid an<l luTsistciit as in that speries and the next. Pods three fourths of uu inrh 

 long and three eighths in diameter, the eross section ohlalo-oval. 



++ ++ Flowers smaller, from one third to half or rarely two thirds of an inch luny, 



= Few or not very mimerous in the spike: pods not densely spiked. 



a. Flattened more or less fore and aft, i. e. contrary to the sutures, and with no 

 proper partition. 



3G. A. pterocarpus, Watson. A foot or two high, but soon declined or de- 

 cumbent, cJuereous-])uliirulent or glubrate. loosely branched : leailets linear-acerose, 

 3 to 9 on the rigid lililorm rhachis, i)ersistent and eipially rigid, of about tiie same 

 breadth (an inch or so in length) : peduncles 7 - 'J-liowered : llowers (hardly known) 

 about half an inch long : pod pendulous, glabrous, ovate or oval (an inch long) cori- 

 aceous, except the acute tip strongly ilattened contrary to the sutures and margined 

 witli a narrow rigid wing, one-celled, the sutures narrow and not intruded : seeds 

 numerous. — Bot. King Exp. 71, t. Vl. 



N. W. Nevada, in alkaline soil at the Junction of tlio Keese River with the Humboldt. Prob- 

 ably not Califoruian : most remarkable for the winged margins of the strongly obcompressed 

 legumes. 



37. A. Casei, Gray. A span or more high, cinereous with minute appres.sed 

 pubescence : stems and branches eiluse, nearly liliform, rigid : leaflets 5 to 15, scat- 

 tered, linear, very obtuse, small (2 to 4 lines long, half a line or less wide), decid- 

 uous; the rhachis and petiole elongated and tiliform : peduncles loosely few-flowered: 

 flowers half an inch long, narrow : teeth of the calyx subulate, hardly one third 

 tiie length of the cylindraceous or oblong tube : corolla apparently pale purple ; 

 pod oblong or lanceolate, acuminate at both ends, about an inch long and 4 

 lines wide, puberulent, sometimes brownish-mottled, cartilaginous, arcuate-incurved, 

 strongly flattened contrary to the sutures, both of which are narrow and externally 

 prominent, one-celled, the cross section transversely narrow-oblong : seeds rather 

 numerous. 



High plateau near Pyramid Lake, N. W. Nevada, Levimon and E. L. Case. 



38. A. iodanthus, Watson. A span or two long, soon procumbent, either 

 pubescent or almost glabrous, leafy; leaflets 1 1 to 21, rather crowded, obovate or 

 roundish : jjeduncles c<|ualling the leaves : flowers rather numerous and close in the 

 oblong spike : teeth of the calyx setaceous-subulate, loose or si)reading, more than 

 half the length of the oblong-camjjanulate tube : corolla bright violet-purple, or 

 rarely pale, half to two thirds of an inch long : pod oblong-linear, an inch or more 

 in length, glabrous, coriaceous, pointed, curved at length into a semicircle, com- 

 pressed contrary to the sutures, both of which are turned inwards with a br(jad 

 groove, so that the cross section is nearly that of a ligure 8 : seeds numerous. — 

 Bot. King Exp. 70. 



Eastern ranges of the Sierra Nevada, from Sierra Valley to the W. Humboldt Jlountains. Flow- 

 ers in spring. Poils somelimes brownish-mottled. 



39. A. Webberi, Gray. A span to a foot high, leafy : leaflet 11 to 21, crowded, 

 both sides silvery-canescent with a fine appressed silky pubescenc , oblong or obovate, 

 4 to 7 lines long : peduncles surpassing the leaves : spike rather densely 9 - 20- 

 flowered : teeth of the calyx subulate, about half the length of the oblong-oampan- 

 ulate tube : corolla white or yellowish-white, half an inch long ; i)od oblong, an 

 inch and more in length, glabrous, thick and fleshy when young, cartilaginous at 

 maturity, blunt or nearly so, straightish or arcuate, turgid, somewhat flattened con- 



