PEA FAMILY 367 



Eefs. — Astragalus collinus Dougl.; Hook. Fl. Bor. Am. 1:141 (1831), type loc. Blue 

 Mts., Ore., Douglas. Var. californicus Gray, Proc. Am. Acad. 12:54 (1878), type loc. Yreka, 

 Greene. A. californicus Greene, Bull. Gal. Acad. 1:157 (1885); Jepson, Man. 571 (1925). 

 Homalohus californicus Hel. Muhl. 2:86 (1905). 



39. A. filipes Torr. Granny Loco. Stems slender, many from base, closely 

 erect, 1 to 2 feet high; herbage glabrous or sparingly strigose-pubescent; leaves 2 

 to 3% inches long; leaflets 9 to 17, rather distant, narrowly linear, % to % inch 

 long; racemes long-peduncled, loosely flowered; calyx-teeth broad, about 14 as 

 long as the campanulate tube; corolla yellowish-white, 4 to 5 lines long; pods spread- 

 ing or pendulous, linear-oblong, acute, compressed, 1-celled, glabrous, % to 1 inch 

 long, 2 to 214 lines wide, rather shortly tapering at base into a stipe 3 to 4 lines long. 



Plains and mountain valleys, 2000 to 5500 feet : Lassen and Modoc Cos. to Sis- 

 kiyou Co. North to Washington. June. 



Geog. note. — Astragalus filipes has its chief development in Washington and Oregon, and as 

 to the typical form enters California only along our northern borders. Through its variety 

 residuus Jepson it is very closely allied to A. antisellii Gray and we are unable to indicate a 

 satisfactory cleavage point in the series constituted by A. filipes and A. antisellii and their 

 varieties. 



Locs. — Shasta Valley plain, K. Brandegee ; Modoc Co., M. S. Balcer ; Milford, Lassen Co., T. 

 Brandegee ; Big Valley, Lassen Co., Balcer <$• Nutting ; Goose Lake, Modoc Co., Austin ^ Bruce; 

 Deep Creek, Warner Mts., L. S. Smith 1126. 



Var. residuus Jepson. Ventral margin of pods straight or straightish, the dorsal margin 

 slightly curved. — Valleys and mountain slopes near the desert from the Santa Eosa Mts. to Mt. 

 Pinos. 



Locs. — Cahuilla Valley, Riverside Co., Jepson 1469; Thomas Valley, San Jacinto Mts., 

 Jepson 1327; San Bernardino Mts., Parish 1281; Mt. Pinos, Hall 6422. 



Eefs. — Astragalus filipes Torr.; Gray, Proc. Am. Acad. 6:226 (1864), type loc. Ft. 

 Okanagan, Wash., Piclcering; Jepson, Man. 571 (1925). Tragacantha filipes Ktze. Rev. Gen. 

 PI. 2:944 (1891). Homalohus filipes Hel. Muhl. 9:67 (1913). Var. residuus Jepson, Man. I.e., 

 type loc. CahuiUa Valley, Jepson 1469. 



40. A. inversus Jones. Lava Loco. Stems flexuous, straggling, V-/2 to 2 feet 

 long; herbage very sparsely strigose; leaflets 7 to 11, linear to filiform, 4 to 6 lines 

 long; flowers 4l^ lines long; calyx-teeth triangular; corolla pinkish; pods linear, 

 acute or acuminate, spreading or recurved, straight or slightly curved, a little 

 thickened, appressed-puberulent, often mottled, IV^ to 1% lines long, II/2 to 2^4 

 lines wide; beak V2 to 2 lines long; stipe 2V2 to 6 lines long. 



Lava beds, 4000 to 4400 feet : Shasta, Lassen and Modoc Cos. May-June. 



Note on occurrence. — Astragalus inversus Jones is a rare endemic of the lava bed region of 

 northeastern California. Further exploration and field investigation may reveal more of it and 

 the nature of its relationship to A. filipes, which is very close. The leaflets in A. inversus are 

 fewer and often narrower and the racemes are more lax than in A. filipes. 



Locs. — Modoc Co., M. S. Balcer; Susanville, Jones; ne. Shasta Co., Hall 4" BahcocTc 4239. 



Refs. — Astragalus inversus Jones, Zoe 4:276 (1893), type loc. Susanville, T. Brandegee. 

 Homalohus inversus Rydb. BuU. Torr. Club 50:271 (1923). A. filipes var. inversus Jepson, Man. 

 571 (1925). 



41. A. antisellii Gray. Doctors Loco. Stems several from the root-crown, 

 erect or ascending, I14 to 3 feet high; herbage strigulose; leaves 2 to 6I/2 inches 

 long; leaflets 23 to 27, oblong to linear, notched at apex or sometimes obtuse, 4 to 

 10 lines long; racemes dense, 2 to 3 inches long; peduncles longer, commonly much 

 longer than the leaves; flowers 5 to 7 lines long, soon spreading or reflexed; calyx- 

 teeth often black-hairy, % as long as the campanulate tube; corolla white; pods 

 spreading or declined, flat, oblanceolate to oblong-oblanceolate, equilateral, ab- 

 ruptly acute, glabrous or minutely and scantily strigulose, 10 to 13 lines long, 2 to 

 3 lines wide. 



Open hillslopes, 1500 to 3700 feet : inner ranges back of the coast from San Luis 

 Obispo Co. to Los Angeles Co. Apr.-May (fl. and fr.). 



