PEA FAMILY 573 



13. Astragalus californicus (A. Gray) Greene. Klamath Basin Rattle-weed. 



Fig. 2787. 



Astragalus collinus var. californicus A. Gray, Proc. Amer. Acad. 12: 54. 1876. 

 Astragalus californicus Greene, Bull. Calif. Acad. 1: 157. 1885. 

 Homalobus californicus Heller, Muhlenbergia 2: 86. 1905. 



Perennial, the stems many from the crown, erect, little branched, rather stout, 5-6 dm. high, 

 grayish pubescent with spreading hairs. Leaves 5-7 cm. long; leaflets 15-21, linear or oblong, 

 5-12 mm. long, often folded, acutish, rather densely pubescent with spreading wavy hairs ; pe- 

 duncles stout, strict, 10-15 cm. long; raceme 8-10 cm. long; flowers many, spreading, 10-15 mm. 

 long, ochroleucous ; calyx-tube broadly cylindric, 5-6 mm. long, somewhat gibbous, black-hairy ; 

 teeth triangular-subulate, about 1.5 mm. long; pod pendulous or spreading, straight, acute at 

 each end, 3-4 cm. long, 4-5 mm. wide, elliptic in cross-section, coriaceous, strigose when young 

 becoming glabrous, blotched with purple, pendent on a stipe 6-12 mm. long. 



Upper Sonoran Zone; valleys of the Klamath River, Siskiyou County, California. Type locality: Yreka, 

 California. April-May. 



14. Astragalus Tweedyi Canby. Tweedy 's Rattle- weed. Fig. 2788. 



Astragalus Tweedyi Canby, Bot. Gaz. 15: 150. 1890. 

 Phaca Tweedyi Piper, Contr. U.S. Nat. Herb. 11: 371. 1906. 

 Homalobus Tweedyi Rydb. Bull. Torrey Club 51 : 14. 1924. 



Perennial, much branched from the base. 3-5 dm. high, slender and flexuous, sparsely strigose- 

 pubescent. Leaves 5-6 cm. long; leaflets 15-21, linear, 7-15 mm. long, rather sparsely strigose; 

 peduncles strict in fruit, 10-20 cm. long ; racemes 4-7 cm. long ; flowers spreading on very short 

 pedicels ; calyx-tube cylindric, 6-7 mm. long, gibbous at base, the teeth triangular, about 1 mm. 

 long; corolla 10-12 mm. long, ochroleucous; pods erect, 12-15 mm. long, 4 mm. wide, nearly 

 circular in cross-section, firm-coriaceous, reticulate, glabrous ; stipe stout, a little longer than 

 the calyx. 



Dry hillsides, Upper Sonoran Zone; Valley of the Columbia, mouth of the Yakima River, Washington, to 

 near The Dalles, Oregon. Type locality : prairies of eastern Oregon. June. 



15. Astragalus Gibbsii Kell. Gibbs's Rattle- weed. Fig. 2789. 



Astragalus Gibbsii Kell. Proc. Calif. Acad. 2: 161. fig. 50. 1862. 

 Tragacantha Gibbsii Kuntze, Rev. Gen. PL 943. 1891. 

 Homalobus Gibbsii Rydb. Bull. Torrey Club 51 : 15. 1924. 

 Homalobus Plummerae Rydb. op. cit. 51: 16. 



Perennial, the stems much branched, decumbent at base, 3-5 dm. high, rather stout, whole 

 plant grayish with a short spreading pubescence. Leaves spreading or often reflexed, 4-5 cm. 

 long ; leaflets usually 17-19, oblong-obovate to obovate, obtuse or retuse at apex, 7-20 mm. 

 long ; peduncles stout, 6-8 cm. long ; fruiting racemes 6-8 cm. long ; flowers many, more or less 

 reflexed; calyx-tube broadly cylindric, 7-8 mm. long, gibbous at base, teeth triangular-subulate, 

 2-3 mm. long; corolla ochroleucous, keel about 10 mm. long, banner strongly reflexed, 2-3 mm. 

 longer than the keel ; pod arcuate, the body about 20-25 mm. long, 4-5 mm. wide, almost circular 

 in cross-section, pilose, acuminate at apex, narrowed at base, firm, splitting at the apex ; stipe 

 equaling the calyx. 



Dry hillsides and plains, Upper Sonoran Zone; eastern Oregon from the western edge of the Columbia Basin 

 east to the Blue Mountains and adjacent Idaho, south to Nevada and northeastern California. Type locality: 

 "Sierra Nevada near the headwater of Carson River," California. June-July. 



16. Astragalus Whitedii Piper. Whited's Rattle-weed. Fig. 2790. 



Astragalus speirocarpus var. falciformis A. Gray, Bot. Calif. 1: 152. 1876. 

 Astragalus speirocarpus var. curvicarpus Sheldon, Minn. Bot. Studies 1: 125. 1894. 

 Astragalus Whitedii Piper, Bull. Torrey Club 29 : 224. 1902. 



Perennial, the stems several from a cespitose caudex, 2-4 dm. high, more or less strigose. 

 Leaves 5-8 cm. long; leaflets mostly 13-15, oblong-obovate, retuse. 10-15 mm. long, strigose; 

 peduncles 5-8 cm. long ; fruiting racemes 4-5 cm. long ; calyx-tube 8 mm. long, gibbous at base, 

 the teeth about 1 mm. long; corolla ochroleucous, 15 mm. long; pod curved, forming about a 

 semicircle, the body 15-20 mm. long, 3-4 mm. wide, abruptly acute at both ends, firm-coriaceous, 

 glabrous ; stipe slender, about 1 cm. long. 



Dry hills, Upper Sonoran Zone; eastern Washington near Wenatchee, to western Idaho, south through 

 eastern Oregon to northeastern California and western Nevada. Type locality: Colockum Creek, 20 miles south- 

 east of Wenatchee, Washington. May-June. 



Astragalus sinuatus Piper, Bull. Torrey Club 28: 40. 1901. Perennial, with cespitose caudex, the stems 

 2-3 dm. high, whole plant short-pubescent with upwardly curved hairs. Leaves 4-5 cm. long; leaflets usually 

 11-13, elliptic, 10-12 mm. long; peduncles about 6 cm. long; flowers not known; pod 20-25 mm. long, 6-7 mm. 

 wide, curved, thick-walled and turgid, sinuous on the lower suture, rugulose, strigose. Known only from the 

 original collection which was made somewhere in eastern Washington by Brandegee in 1883. 



17. Astragalus subglaber (A. Gray) M. E. Peck. Glabrous Rattle-weed. 



Fig. 2791. 



Astragalus collinus var. subglaber A. Gray ex Rydb. Bull. Torrey Club 51 : 17. 1924. 



Homalobus subglaber Rydb. loc. cit. 



Astragalus subglaber M. E. Peck, Man. PI. Oregon 444. 1941. 



Perennial, with cespitose caudex, the stems 2-3 dm. high, glabrous or nearly so. Leaves 4-8 



