PEA FAMILY 375 



60. A. andersonii Gray. Carson Loco. (Fig. 214.) Stems several, tufted 

 on a branched root-crown, I/2 to 1 foot high; herbage gray-villous ; leaves 1 to 3^^ 

 inches long; leaflets 13 to 25, oblong or obovate, 3 to 5 lines long; peduncles a little 

 surpassing or often shorter than the leaves; racemes closely flowered, % to 1% 

 inches long; flowers 6 lines long; calyx-teeth subulate-setaceous, about as long as 

 the campanulate tube; corolla yellowish-white or pinkish; pods sessile, linear-ob- 

 long, compressed, curved, grooved dorsally, densely villous, incompletely 2-celled, 

 6 to 8 lines long, 1% to 2 lines wide; seeds 16 to 20. 



Valley flats, 4000 to 5000 feet : east side of the Sierra Nevada, occupying a 

 narrow strip from Inyo Co. to Lassen Co., California, and in Washoe Co., western 

 Nevada. May. 



Locs. — Lone Pine Creek, Inyo Co., Hall 4- Chandler 7202; Bishop, Heller 8357; Chat, Lassen 

 Co., Stephenson; Janesville, Lassen Co., T. Brandegee; Honey Lake, T. Brandegee. 



Eefs. — Astragalus andersonii Gray, Proc. Am. Acad. 6:524 (1865), type loc. Carson 

 City, Nev., Anderson; Jepson, Man. 576 (1925). Tragacantha andersonii Ktze. Rev. Gen. PI. 

 2:943 (1891). Hamosa andersonii Rydb. Bull. Terr. Club 54:16 (1927). 



61. A. congdonii Wats. Foothill Loco. Stems more or less branched, com- 

 monly decumbent at base, % to 1 foot high; herbage loosely white-pilose, on the 

 upper part of the stems the white hairs often mixed with some stiff black ones; 

 leaves II/2 to 21/2 inches long; leaflets 17 to 25, obovate to oblong, retuse or obtuse, 

 2 to 3 lines long; racemes very loose, elongate, on peduncles longer than the leaves; 

 flowers 5 to 6 lines long; calyx-teeth triangular-subulate, nearly as long as the tube; 

 corolla 3^ellowish-white ; pods linear, curved, somewhat compressed, puberulent, 

 pendulous, grooved on the back, incompletely 2-celled, 1 inch long, 1 line wide; 

 seeds numerous. 



Dry rocky hillslopes, 1000 to 2000 feet : Amador Co. to Mariposa Co. May 

 (fl. andfr.). 



Locs. — Amador Co., Hansen 344; Pine Log, Tuolumne Co., A. L. Grant 718; Five-Mile Creek, 

 Tuolumne Co., A. L. Grant 739; Hites Cove, Mariposa Co., Congdon. 



Eefs. — Astragalus congdonii Wats. Proc. Am. Acad. 20:360 (1885), type loc. Hites Cove, 

 Mariposa Co., Congdon; Jepson, Man. 574 (1925). Hamosa congdonii Kydb. Bull. Torr. Club 

 54:20 (1927). 



62. A. atratus Wats. var. mensanus Jones. ]\Iesa Loco. Stems several from 

 the branched root-crown, slender, loosely branched, sparsely leafy, erect, i/i to 

 114 feet high; herbage greenish, very scantily strigulose, save that the leaflets are 

 very markedly strigulose; leaves II/2 to 3I/2 inches long; leaflets 7 to 19, broadly 

 oblong to linear, 2 to 4 lines long; racemes loosely 3 to 8-flowered, i/^ to 2V2 inches 

 long; peduncles li/4 to 3i/^ inches long, exceeding the leaves; flowers 3 lines long; 

 calj-x-teeth narrowly lanceolate, Vn to I/2 as long as the tube; corolla white, purple 

 at tip ; pods subterete or a little flattened, acute, attenuate at base, narrowly grooved 

 on the back, minutely pubescent, 7 lines long, 1% to 2 lines wide, the dorsal intru- 

 sion or fold narrow but deep, the ventral margin cord-like or thickened. 



Sandy flats, 5900 feet : Inyo Co. (Darwin Mesa). 



Note on habit and occurrence. — The petioles vary from 1 to 2 14 inches long. The racemes 

 are said to be secund. We have seen no specimens save those of the type collection. This variety 

 appears to be much of a rarity. 



Eefs.— Astragalus atratus Wats. Bot. King 69, pi. 11 (1871), type loc. Pah-Ute, Havallah 

 and Toyabe ranges, Nev., Watson 265. Tragacantha atrata Ktze. Eev. Gen. PI. 2:943 (1891). 

 Hamosa atrata Eydb. Bull. Torr. Club 34:48 (1907). Tium atratum Eydb. N. Am. Fl. 24:394 

 (1929). Var. mensanus Jones, Proc. Cal. Acad. ser. 2, 5:665 (1895), type loc. Darwin Mesa, 

 about 2 miles s. of the Mill Creek divide, Inyo Co., Coville 4' Funston 792. Tium mensarum Eydb. 

 N. Am. Fl. 24:395 (1929). 



A. atratus Wats, is cited for Mineral King by CovUle (Contrib. U. S. Nat. Herb. 4:85) on 

 the basis of Coville 4- Funston 1561 which is too scanty and too imperfect for certain determma- 

 tion, but may be A. bicristatus Gray as annotated by M. E. Jones. That station is not geo- 

 graphically and ecologically in keeping for A. atratus. 



