rouo-scierocarpl. 14? 



4-6 mm. long, racemes short and on a very short peduncle, clustered 

 "mcng the leaves in fruit. Leaflets 3-10 pairs, not jointed to rachis. 

 From southwestern Kansas on the Plains, to the mountains and north- 

 ward to the Saskatchewan, westward through northern Colorado to 

 western Wyoming, growing in rather alkaline meadows. Its place is 

 taken in the Navajo Basin by A. lonchocarpus. Not on the Pacific 

 slope except in Wyoming. 



Astragalus pectinatus var. pla typhyllus Jones Cont. 10 87 (1902). 

 This is a form with leaflets nearly 5 mm. wide after the style of A. 

 Grayi but decurrent on the winged rachis toward the tip of the leaf, 

 .3ome leaflets jointed to the rachis. Bitter Creek Wyoming, Nelson. 



101. Astragalus Case! Cxray Bot. Cal. 1 154 (1876). Pods with 

 ^ross section oblong to linear when dry, when fresh oval to reniform 

 -r even almost that of the figure 8 l^id on its side, about 4-5 cm. 

 long, 6-8 mm. wide, 2-5 mm. high, puberulent, bent into the shape of 

 R by the tip being upcurved and the base declined, with sutures nar- 

 rov/ externally and prominent, sessile, pendent to horizontal, wider 

 l)elo-'*' the middle, splitting the calyx, often shallow-sulcate ventrally 

 pnd usually so dorsally, rugose when dry, weakly attached to calyx. 

 Flesh variable but never very thick. Flowers not over 2 cm. Ions:, 

 nearly sessile, few, at the ends of long peduncles. Banner oblong- 

 rvate. deeT^ly notched, 9 mm. long, abruptly arched to 60 degrees a 

 I'ttle beyond the calyx tips, with sides reflexed most in the middle to 

 about 90 degrees to blade and 4 mm, wide there but not at all at tip. 

 '"ronve U-shaped. 1 mm. wide, 2 mm. deep, very narrow below and 

 ' ■•'^adening into a wide arc at tip of banner. White spot fan-shaped, 

 filling the groove only, cut bv wide and purple streaks, coming within 

 3 mm. of tin of banner. Wings '^blanceolate, rounded, entire, con- 

 cave to keel, both flarine and about 2 mm. apart at tip, purple- 

 streaked at base, white above, 2 mm. longer than keel, not over 2 

 mm. wide. Keel short, with tip white and purple below, quickly 

 rounded to 90 degrees, obtuse, 3 mm. high, base straight. Calyx 

 oblong to cylindrical, 3-8 mm. long. 2 mm. wide and high, with up- 

 per side arched .lower side straight, attached on lower fleshy cor- 

 ner. 5-ribbed by nerves running through from tips of calyx teeth, 

 scarcely flattened laterally or but little. Teeth deltoid to subulate- 

 triangular, 1-2 mm. long. Fruiting pedicels very stout, shorter than 

 (he bracts, i^t flower 1 'iim. long. Bracts conspicuous, rigid, often 4 

 '"'m. long. Peduncles and rachis 1.5-2 dm. long, loosely flowered on 

 the upper third. Leaflets 2-7 pairs, obtuse. Lower pairs of leaflets 

 rf middle leaves about 2.5 cm. long, not over 4 mm. wide, uppermost 

 -"ften verv mvr\\ reduced, mostly 5-9 mm. long, narrowly oblong to 

 linear oblong rigid, distant, usually folded, pubescent on both sides 

 obtuse, netiolulf'te. jointed to rachis. Rachis of leaf elongated, fili- 

 form. 3-10 cm. lo'ig. Lower leaves short. Stems 1-2 ft high, widely 

 branched and spreading, very zigzag, pubescence ashy with minute 

 pnrressed and muricate hairs. Stipules rigid, green, deltoid, reflexed 

 3-5 mm. lonsr. Rather common in the sagebrush from Pyramid Lake 

 to Death Valley along the eastern side of the Sierras in rather bare 

 spots, eastward to Candelaria, Tonapah and also in the Panamint Mts. 

 Lower Temnerate life zone. It has the appearance somewhat of A. 

 I..aynea9 and is easily miftaken for it when t he pods have become sul- 

 cate dorsally in the drying. It blooms in the early summer. 



102. Astragalus pterocarpus Watson Bot. King. 71 t 12 (1871). 

 Pods completely obcompressed. winged on the sides only, ovate to el- 

 liptical, rather wider below the middle, S-shaped, equally acute at 

 •^ach end, not acuminate, 1 cm. wide. 4 cm. long and 2-3 mm. thick, 

 in the dry pods the cross nerves raised and branched along the mar- 

 srin, tip acute and laterally compressed, cross section linear, very 

 weakly attached to and splitting the calyx, opening at base and apex 

 equally at both sutures and along the ventral suture later, when 



