PEA FAMILY 595 



88. Astragalus conjunctus S. Wats. Strict Locoweed. Fig. 2862. 



Astragalus conjunctus S. Wats. Proc. Amer. Acad. 17: 371. 1882. 



Astragalus arrectus var. conjunctus M. E. Jones, Contr. West. Bot. No. 10: 61. 1902. 



Phaca conjuncta Piper, Contr. U.S. Nat. Herb. 11: 373. 1906. 



Tium Sheldonii Rydb. N. Amer. Fl. 24: 393. 1929. 



Stems tufted on a woody crown, erect or ascending, rather slender, about 1 dm. high, gla- 

 brous or nearly so. Leaves 15-20 cm. long; leaflets rather remote, 15-23, narrowly linear, 5-15 

 mm. long, sparsely strigose ; peduncles scape-like, 2-3 dm. long; racemes at length 4-15 cm. long ; 

 calyx-tube 8 mm. long, sparsely black-hairy, the teeth triangular-subulate, 2-3 mm. long ; corolla 

 purple or tinged with purple, 2 cm. long ; pods sessile, erect, 20-25 mm. long, 4-5 mm. wide, 5-6 

 mm. thick, obtuse or rounded at base, abruptly acuminate above into a slender beak, glabrous, 

 chartaceous, the lower suture slightly sulcate. 



Dry hillsides, Upper Sonoran Zone; eastern Washington to southeastern Oregon and Idaho. Type locality: 

 John Day Valley, Oregon. May-June. 



Astragalus conjunctus var. oxytropidoides M. E. Jones, Proc. Calif. Acad. II. 5: 665. 1895. {Tium 

 oxytropoid.es Rydb. N. Amer. Fl. 24: 393. 1929.) Mainly distinguished from typical A. conjunctus by the 

 strigose pods. Vicinity of The Dalles, Oregon. 



89. Astragalus miser Dougl. Douglas' Dwarf Locoweed. Fig. 2863. 



Astragalus miser Dougl. ex Hook. Fl. Bor. Amer. 1: 153. 1838. 

 Astragalus obscurus S. Wats. Bot. King Expl. 69. 1871. 

 Tium miserum Rydb. N. Amer. Fl. 24: 394. 1929. 



Stems several arising from a cespitose caudex, slender, 5-15 cm. high, ascending. Leaflets 



9-15, linear or oblong, 3-10 mm. long, 1-2 mm. wide, strigose on both sides ; peduncles 6-10 cm. 



long; racemes 2-5 cm. long; calyx strigose, with intermingling white and black hairs, the tube 



3 mm. long; corolla 8-10 mm. long, yellowish, the keel tipped with purple; pod subsessile, linear, 



15-20 mm. long, acute at both ends, strigose, the lower suture sulcate, the septum about 1 mm. 



wide. 



Dry hillsides, Arid Transition Zone; eastern Washington to Idaho and Nevada, and northeastern California 

 to Lake Tahoe. Type locality : Spokane River, Washington. April-May. 



90. Astragalus Brauntonii Parish. Braunton's Rattle-weed. Fig. 2864. 



Astragalus Brauntonii Parish, Bull. S. Calif. Acad. 2: 26. 1903. 

 Brachyphragma Brauntonii Rydb. N. Amer. Fl. 24: 399. 1929. 



Perennial, the whole plant densely canescent-tomentose, woody below ; stems of the season 

 stout, erect or reclinate, 1-1.5 m. high. Leaflets 25-41, oblong to oblong-elliptic, 6-20 mm. long; 

 peduncles 3-5 cm. long ; racemes dense, 4-9 cm. long ; flowers reflexed ; calyx-tube 3 mm. long, 

 the teeth subulate, 2.5-3 mm. long; corolla rose-purple, 10 mm. long; pod sessile, coriaceous, 

 obliquely oblong-ovoid, 8-10 mm. long, densely tomentose, rounded at base, acute at apex, upper 

 suture ribbed, the lower sulcate. 



Dry clay soils, Upper Sonoran Zone; coastal southern California. Type locality: near Santa Monica, Cali- 

 fornia. April-June. 



91. Astragalus Serenoi (Kuntze) Sheldon. Humboldt Rattle-weed. Fig. 2865. 



Astragalus nudus S. Wats. Bot. King Expl. 74. 1871. Not Clos. 1846. 

 Tragacantha Serenoi Kuntze, Rev. Gen. PI. 941. 1891. 

 Astragalus Serenoi Sheldon, Minn. Bot. Studies 1 : 130. 1894. 

 Astragalus Shockleyi M. E. Jones, Proc. Calif. Acad. II. 5: 659. 1895. 

 Brachyphragma Serenoi Rydb. Amer. Journ. Bot. 16: 205. 1929. 



Perennial with a woody base, stems several, decumbent at base, 4-6 dm. high, glabrous, 

 branching. Leaves 10-15 cm. long; leaflets 3-7, very sparsely strigose or glabrate above, densely 

 white-strigose beneath, those of the lower leaves oblanceolate to narrowly oval, those of the upper 

 leaves linear, 2-4 cm. long, 1-4 mm. wide, acute at each end; peduncles 10-20 cm. long; racemes 

 loosely flowered, 2-10 cm. long; calyx-tube 6-7 mm. long, black-hairy, the teeth subulate, 4-5 

 mm. long; corolla about 2 cm. long, the banner much exceeding the keel, purple and white; pods 

 woody-coriaceous, glabrous and wrinkled, oblong, 15-25 mm. long, 10 mm. wide and about as 

 thick, abruptly narrowed to the slender beak, the septum 2 mm. wide, not extending to the apex. 



Canyons of desert ranges, Upper Sonoran Zone; eastern California to central Nevada. Type locality: West 

 Humboldt Mountains, Nevada. April-June. 



92. Astragalus mohavensis S. Wats. Mojave Rattle-weed. Fig. 2866. 



Astragalus mohavensis S. Wats. Proc. Amer. Acad. 20: 361. 1885. 



Perennial froma taproot, the stems much branched from the base, decumbent, 2-4 dm. long, 

 the whole plant hairy with a short appressed pubescence. Leaflets usually 7-9, obovate-elliptic 

 to lanceolate-elliptic, 5-15 mm. long; peduncles 5-8 cm. long, about equaled by the fruiting 

 racemes ; calyx-tube 3 mm. long, the teeth subulate, 2 mm. long ; corolla purple, 7 mm. long ; 

 pod compressed, oblong, 15-20 mm. long, 6-7 mm. wide, strigose, both sutures prominent. 



Dry desert washes, Lower Sonoran Zone; Mojave Desert of southern California to southern Nevada. Type 

 locality: "In a canyon south of Newberry Spring in the Mojave Valley, in large depressed masses." March-May. 



