PHA FAMILY 373 



long; calyx-teeth slender, nearly as long as the campanulate tube; corolla yellow- 

 ish; pods elliptic-oblong, obtuse, somewhat compressed, pubescent, 2-celled, 2% 

 lines long, the dorsal suture shallow. 



Valleys, 4800 to 5100 feet: eastern crests of the northern Sierra Nevada in 

 southeastern Plumas Co. Crook Co., eastern Oregon. June (fl. and fr.). 



So far as appears from collections this is one of the rarest of Califomian Astragali. Lemmon 

 writes on an herbarium label: "Clover Valley, near Sierra Valley", which would doubtless make 

 the type locality Eed Clover Valley, southeastern Plumas Co. 



Eefs. — Astragalus lentifokmis Gray; B, & W. Bot. Cal. 1:156 (1876), type loc. "Clover 

 Valley," Sierra Nevada, Lemmon. Tragacantha lentiformis Ktze. Eev. Gen. PL 2:946 (1891). 



55. A. austinae Gray. Silver Loco. Stems densely tufted, 2 to 4 inches long, 

 from a branched root-crovm; herbage silvery-pubescent; stipules scarious, mostly 

 united into one ovate body opposite the leaf; leaves 1 to 1^/4 inches long; leaflets 9 

 to 17, rather crowded, oblong or ovate-lanceolate, 2 to 4 lines long; peduncles 

 equaling or exceeding the leaves, bearing 10 to 12 nearly sessile flowers in a dense 

 head; calyx-teeth filiform, longer than the campanulate tube; corolla whitish, 3 

 to 4 lines long, persistent, with villous wings and banner; pods sessile, densely 

 pubescent, somewhat obcompressed, grooved dorsally, incompletely 2-celled, 2^/2 

 to 3 lines long (not equaling the calyx and corolla) ; seeds few. 



Sandy stony soil on dry exposed ridges, 8000 to 11,000 feet: eastern crests of 

 the northern Sierra Nevada from Placer Co. to Nevada Co. East to Nevada. July. 



Locs. — Tinker's Knob, Placer Co., Sonne; Castle Peak (Mt. Stanford), Nevada Co., Sonne; 

 Mt. Lola, Nevada Co., Lemmon. 



Eefs. — Astragalus austinae Gray; B. & W. Bot. Cal. 1:156 (1876), type loc. Mt. Stanford, 

 Nevada Co., Lemmon; Jepson, Man. 575 (1925). Tragacantha austinae Ktze. Eev. Gen. PI. 

 2:943 (1891). 



56. A. agrestis Dougl. Purple Loco. Stems ascending, 4 to 12 inches high 

 from a slender root-crown; herbage sparingly strigose; leaves 1^/2 to 3^2 inches 

 long; stipules lanceolate; leaflets 11 to 21, linear to oblong, usually retuse, 3 to 7 

 lines long; peduncles l^^ to 4I/2 inches long; racemes very dense, subcapitate or 

 short-spicate, % to II/2 inches long; bracts broadly oblong to lanceolate, 2 to 2^ 

 lines long; rachis, bracts and calyces black- or white-hairy; flowers subsessile, 7 to 

 10 lines long; calyx-tube 2^2 lines long, the linear-subulate teeth about % as long; 

 corolla purple ; banner narrowly oblong, much exceeding the wings, and these the 

 keel; pods densely pilose, obliquely ovoid, 4 to 5 lines long, 1^/^ to 2 lines wide, 

 2-celled, the dorsal suture deeply sulcate ; seeds roundish-renif orm, 1 line long. 



Adobe soil, 5400 feet : Lassen Co. North to Washington and Manitoba, east 

 to Minnesota, south to New ]\Iexico. June. 



Geog. note. — Astragalus agrestis is a not infrequent species in the Great Basin and north- 

 ward. As to California it enters only the northeastern part of the state, where it has been col- 

 lected only once (Madeline plains, Austin Sr Bruce). 



Eefs.— Astragalus agrestis Dougl.; Hook. Fl. Bor. Am. 1:148 (1834), type loc. plains of 

 the Eed Eiver, Manitoba, Douglas, as synonym. A. hypogloitis var. 6 Hook. I.e. Phaca agrestis 

 Piper, Contrib. U. S. Nat. Herb. 11:372 (1906). A. goniatus Nutt.; T. & G. Fl. 1:330 (1838), 

 type loc. Eocky Mts. near the seurces of the Platte Eiver, Nuttall. 



57. A. mortonii Nutt. Montana Loco. Stout, often widely branched from 

 base, 1/2 to 2 feet high; herbage strigulose; leaves 3 to 5 inches long; leaflets 13 to 

 21, oblong to obovate, obtuse or acute, 6 to 13 lines long; peduncles shorter or longer 

 than the leaves; racemes densely flowered, spike-like, in fruit very crowded and 1% 

 to 5 inches long; flowers greenish- white or cream-color, 6 to 7 lines long, reflexed 

 as they open, the fruit erect; calyx-teeth triangular, l^ as long as the broadly 

 oblong tube ; corolla greenish-white or cream-color ; pods subcylindric or narrowly 

 oblong, straight, grooved dorsally, incompletely 2-celled, 5 to 6 lines long, l^/^ 

 lines wide, the ventral suture externally prominent; seeds numerous. 



