PEA FAMILY 607 



appressed-pubescent ; peduncles 6-8 mm. long ; racemes about 25 mm. long ; calyx-tube 3-4 mm. 

 long, black-hairy; teeth subulate, 2.5 mm. long; corolla white, 12 mm. long; stipe about 1 cm. 

 long ; body of pod half-ovoid, about 2 cm. long, 1 cm. wide and nearly as thick, coriaceous and 

 corrugately roughened with transverse ridges, ribbed on both sides by the prominent sutures. 



Open woods, Arid Transition Zone; Jackson and Josephine Counties, Oregon, to Tehama County, California. 

 Type locality: open woods near Ashland, Oregon. April. 



128. Astragalus vallaris M. E. Jones. Snake River Rattle-weed. Fig. 2902. 



Astragalus vallaris M. E. Jones, Contr. West. Bot. No. 10: 59. 1902. 

 Hesperonix vallaris Rydb. N. Amer. Fl. 24: 439. 1929. 



Stems stout, several from the crown of a woody rootstock, decumbent or ascending, about 

 3 dm. long, glabrous. Leaflets elliptic, 6-15 mm. long, glabrous or sparsely pubescent on the 

 midrib and margins; peduncles stout, 5-8 cm. long; racemes short; calyx-tube 5 mm. long, black- 

 hairy; teeth subulate, 4-5 mm. long; corolla white, 18 mm. long; pods 35-50 mm. long, 10-12 

 mm. thick, 4-5 mm. wide, oblong-ovoid, abruptly acuminate at apex, narrowed at base with firm 

 rather thick cartilaginous walls, 2-celled; stipe 10—12 mm. long. 



Dry hillsides, Snake River Canyon and Pine Creek, eastern Oregon. Type locality: Snake River Canyon, 

 near Ballard's Landing, Oregon. April-May. 



129. Astragalus Mortonii Nutt. Morton's Locoweed. Fig. 2903. 



Astragalus Mortonii Nutt. Journ. Acad. Phila. 7 : 19. 1834. 

 Astragalus spicatus Nutt. in Torr. & Gray, Fl. N. Amer. 1 : 336. 1838. 

 Astragalus canadensis var. Mortonii S. Wats. Bot. King Expl. 68. 1871. 

 Tragacantha Mortonii Kuntze, Rev. Gen. PI. 2: 946. 1891. 

 Phaca Mortonii Piper, Contr. U.S. Nat. Herb. 11: 372. 1906. 

 Astragalus Torreyi Rydb. N. Amer. Fl. 24: 448. 1929. 



Perennial, the stems few to several, ascending, 4-6 dm. high, stout, glabrous or sparsely 

 strigose. Leaves 8-12 cm. long; leaflets 13-21, elliptic to oblong-elliptic, 15-30 mm. long, obtuse 

 or rounded at apex, sparsely strigose beneath, glabrous or nearly so above ; peduncles stout, 

 often 10-12 cm. long ; racemes densely flowered, 3-6 cm. long ; calyx campanulate-strigose, often 

 intermingled with black hairs ; tube 5 mm. long ; teeth triangular-subulate, 2 mm. long ; corolla 

 15 mm. long, ochroleucous ; pods oblong, about 12 mm. long, 4 mm. thick, the lower shallowly 

 sulcate, the upper suture prominent, chartaceous, glabrous or sparsely strigose. 



Open forests, Transition and Canadian Zones; eastern Washington to northeastern California, Idaho, and 

 Utah. Type locality: "About the sources and upper branches of the Missouri." June-Aug. 



Astragalus brevidens Rydb. N. Amer. Fl. 24: 450. 1929. A closely related species or possibly subspecies 

 with short white-villous pubescence on the calyx. Baker County, Oregon, and adjacent Washington. 



130. Astragalus striatus Nutt. Striate Locoweed. Fig. 2904. 



Astragalus adsurgens of Amer. authors. Not Pall. 



Astragalus nitidus Dougl. ex Hook. Fl. Bor. Amer. 1: 149, as a synonym. 1830. 



Astragalus striatus Nutt. in Torr. & Gray, Fl. N. Amer. 1: 330. 1838. 



Perennial, the stems several from the short branching crown, decumbent, 2-3 dm. long, pal- 

 lid, sparsely strigose. Leaflets usually 13, narrowly elliptic-lanceolate to linear-lanceolate, 8-12 

 mm. long, silky-strigose; peduncles stout, 5-15 cm. long; racemes spicate, densely flowered, 

 2-5 cm. long ; calyx cylindric, strigose with or without interspersed black hairs, the tube 5-6 cm. 

 long, the teeth subulate, 3 mm. long; corolla purple or white, 14-15 mm. long; pods narrowly 

 ellipsoid, 7-10 mm. long, 3-4 mm. wide, chartaceous, silky-strigose, the lower suture sulcate. 



Dry plains and hills, Arid Transition and Upper Sonoran Zones; British Columbia to Medical and Silver 

 Lakes, Washington, and Harney Lake, Oregon, east to Saskatchewan, Minnesota, and Colorado. Type locality: 

 "Plains and hills of the Platte and Missouri." June-July. 



131. Astragalus goniatus Nutt. Angle-stemmed Locoweed. Fig. 2905. 



Astragalus hypoglottis of Amer. authors. Not L. 



Astragalus goniatus Nutt. in Torr. & Gray, N. Amer. Fl. 1: 330. 1838. 



Perennial, with a woody rootstock ; stems 1-2 dm. high, decumbent or ascending, glabrous or 

 sparingly strigose. Leaflets 15-21, linear-oblong to elliptic, obtuse or retuse, 5-10 mm. long, 

 sparingly strigose or glabrate; peduncles about 5 cm. long; racemes spicate, densely flowered, 

 2-3 cm. long ; calyx-tube 6-7 mm. long, usually with black hairs, the teeth subulate, 2-3 mm. 

 long; corolla 15 mm. long; purple pod ovoid, about 1 cm. long, long-villous. 



Meadows and river valleys, Arid Transition Zone; eastern Washington to northeastern California, Minne- 

 sota, and New Mexico. Type locality: "Rocky Mountains, near the sources of the Platte." May-July. 



132. Astragalus Spaldingii A. Gray. Spalding's Locoweed. Fig. 2906. 



Astragalus Spaldingii A. Gray, Proc. Amer. Acad. 6: 524. 1865. 

 Tragacantha Spaldingii Kuntze, Rev. Gen. PI. 2: 948. 1891. 

 Phaca Spaldingii Piper, Contr. U.S. Nat. Herb. 1 : 370. 1906. 

 Astragalus tighensis M. E. Peck, Proc. Biol. Soc. Wash. 49: 110. 1936. 



Perennial, the stems tufted from the crown of a woody rootstock, decumbent, rather slender, 

 3-6 dm. long, the entire plant white-villous. Leaflets mostly 19-25, narrowly oblong-lanceolate, 

 acute, 5-8 mm. long ; peduncles 4-10 cm. long; racemes spicate, densely flowered, 2-3 cm. long, be- 

 coming elongated and looser in fruit ; calyx-tube 3 mm. long, long-villous ; teeth subulate, equaling 

 or slightly exceeding the tube ; corolla ochroleucous, 7-8 mm. long ; pod erect or ascending, long- 



