362 LEGUMINOSAE 



Newberr}/. Xylophacos newbcrri/i Rydb. Bull. Torr. Club 32:662 (1905). A. candelarius var. 

 exipuus Shcld. Minn. Bot. Stud. 1:143 (1894), in part, as to Utah spms. cited. Var. castoreus 

 Jones, Proc. Cal. Acad. ser. 2, 5:658 (1895), type loc. Copper Mine, St. George, Utah, Jones 5006, 



27. A. mohavensis Wats. Mohave Loco. Stems much-branched, from a 

 somewhat woody base, 1/4 to 1 foot liip:li; herbajze silky-villous with appressed hairs, 

 or the stems glabrate; stipules triangiihir, distinct; leaves IV2 to 21^ inches long; 

 leaflets about 11, roundish-obovate to oblong-obovate, 3 to 6 lines long; racemes 

 loosely fcAv-flowered, the peduncles shorter than the leaves; calyx-teeth narrow, 

 about equaling the turbinate tube; corolla blue, 4i/^ to 5 lines long; pods oblong, 

 somewhat flattened, coriaceous, rugulose, incompletely 2-celled, hoary-pubescent, 

 6 to 9 (or 12) lines long, both sutures prominent and cord-like externally; seeds 

 many. 



Montane slopes, 4000 to 8000 feet : desert ranges from the eastern Mohave Des- 

 ert to the Death Valley region. Southwestern Nevada. May. 



Locs. — Providence Mts., T. Brandegee; Hanaupah Canon, Panamint Range, Jepson 6955; 

 Telescope Peak, Jepson 7004; Keeler, Inyo Co., T. Brandegee. Nev. : Good Sprs., Jones; Amar- 

 gosa Desert, Jones. 



Refs. — Astragalus mohavensis Wats. Proc. Am. Acad. 20:361 (1885), type loc. Newberry 

 Spr., Mohave Valley, Lemmon; Jepson, Man. 569, fig. 558 (1925). Brachyphragma mohavense 

 Rydb. N. Am. Fl. 24:400 (1929). 



28. A. pach3rpus Greene. Bush Loco. Bushy plant, erect, II/2 to 4 feet high; 

 herbage densely silvery-puberulent, the leaves soon glabrate, especially above; 

 leaves 3 to 5 inches long; leaflets 15 to 21, narrowly linear, retuse or obtuse, 4 to 

 12 lines long; racemes loosely few-flowered, equaling the leaves; calyx-teeth subu- 

 late, equaling the canipanulate tube; corolla pure white, soon becoming sordid, 8 

 lines long; pods narrowly oblong, slightly incurved when mature, incompletely 

 2-celled, %, to 1 inch long, shortly thick-stiped, fleshy when young, in age coria- 

 ceous and rather strongly rugulose, both sutures extremely prominent and cord- 

 like; seeds about 12. 



Dry hillslopes, 2000 to 6300 feet: Tehachapi Mts., west to the Cuyama Valley; 

 recurring in southwestern Riverside Co. May- June (fl. and fr.). 



Geog. note. — Astragalus pachypus Greene, a singular and well-marked species, is peculiar 

 to the mountains which form a crescent about the extreme southerly end of the San Joaquin Val- 

 ley from the headwaters of the Cuyama River easterly through the Tehachapi Mountains to Hack- 

 berry Creek in the lower Kern River country. This range is consistent with the general law of 

 distribution of plant species in this region. It has been attributed to Cajon Pass, but this is a 

 clerical error for Tejon Pass. The outlying station on the Temecula River in Riverside Co. is 

 quite anomalous and mystifying. 



Locs. — Caliente, K. Brandegee ; Rowen, Tehachapi Mts., Jepson 6734; Seymour Creek, Mt. 

 Pinos, Muns 6981; Cuyama Valley, Santa Barbara Co., Eastwood; Tejon Pass, Parish 9223; 

 Dripping Spr., Temecula River, Peirson. 



Refs. — Astragalus pachypus Greene, Bull. Cal. Acad. 1:157 (1885), type loc. Bealville, 

 Kern Co., Curran; Jepson, Man. 569, fig. 559 (1925). Brachyphragma pachypus Rydb. N. Am. 

 Fl. 24:401 (1929). 



29. A. pacificus Sheld. Siskiyou Loco. Stems erect or ascending from a 

 stout rootstock, 1 to 2 feet high; herbage thinly pubescent; leaves 2^/2 to 4 inches 

 long; leaflets 9 to 19, oblong, usually cuneate at base, sometimes obovate, retuse, 

 3 to 9 lines long; petioles short (mostly 3 to 7 lines long) ; racemes short (% to 

 1^ inches long), loosely flowered, the peduncles equaling or exceeding the leaves; 

 calyx-teeth slender, nearly equaling the tube; corolla yellowish, 5 to 7 lines long; 

 pods elliptic, 2-celled, very turgid, about as thick as broad, abruptly mucronate, 

 6 to 11 lines long, 4% to 5V2 lines wide, glabrous, fleshy-coriaceous, strongly 

 rugulose, reflexed or ascending, borne on a stipe nearly twice as long as the calyx- 

 tube, the ventral suture externally prominent and cord-like, the dorsal suture less 

 so; seeds 8 or 10. 



Dry slopes, 4000 feet: Siskiyou Co. North to Oregon. July (fr.). 



