PEA FAMILY 583 



48. Astragalus Whitneyi A. Gray. Whitney's Locoweed. Fig. 2822. 



Astragalus Whitneyi A. Gray, Proc. Amer. Acad. 6: 526. 1865. 



Astragalus Hookerianus var. Whitneyi M. E. Jones, Proc. Calif. Acad. II. 5: 668. 1895. 



Phaca Whitneyi Heller, Muhlenbergia 9: 67. 1913. 



Phaca lenophylla Rydb. N. Amer. Fl. 24: 341. 1929. 



Astragalus violaceus St. John, Research Stud. St. Coll. Wash. 1 : 98. 1929. 



Perennial, with a deep taproot and cespitose caudex, the flowering stems 1-2 dm. long, de- 

 cumbent, cinereous. Leaflets 13-19, oblong, 5-10 mm. long, strigose-canescent on both sides; 

 racemes short, few-flowered ; calyx-tube 3-4 mm. long, more or less black-hairy, the teeth subu- 

 late, 2 mm. long; corolla ochroleucous or pale purple, 8-10 mm. long; pod 15-30 mm. long, 

 obovoid, mottled, the stipe about equaling the calyx. 



Dry slopes and ridges, Boreal Zones; Sierra Nevada and high desert ranges of southeastern California and 

 western Nevada. Type locality: near Sonora Pass, Sierra Nevada, California. July-Sept. 



Astragalus Whitneyi subsp. pinosus (Elmer) Abrams. {A. Whitneyi var. pinosus Elmer, Bot. Gaz. 39: 

 54. 1905.) Leaflets sparsely strigose; pods glabrous, conspicuously mottled. Mount Pinos, southern California. 



Astragalus Whitneyi subsp. Hookerianus (Torr. & Gray) Abrams. {Phaca Hookeriana Torr. & Gray, Fl. 

 N. Amer. 1: 693. 1840; Astragalus Sonneanus Greene, Pittonia 3: 186. 1897.) Leaflets canescent; pods 

 2-3.5 cm. long, strigose. Eastern Washington to northeastern California, Idaho, and Colorado. This subspecies 

 as here treated is variable and may include two or three geographic variations worthy of subspecific rank. The 

 plants of northeastern California and adjacent Oregon have more flowers in the racemes, larger corollas and pods. 



Astragalus Whitneyi subsp. siskiyouensis (Rydb.) Abrams. {Phaca siskiyouensis Rydb. N. Amer. Fl. 24: 

 340. 1929.) Leaflets 10-15 mm. long, sparsely strigose or nearly glabrous. Stems often 2 dm. long; racemes 

 lax, 4-7-flowered; corolla 8-9 mm. long; pods 3-4.5 cm. long, glabrous. Trinity Mountains, California. Type 

 locality: Mount Eddy, Siskiyou County, California. 



49. Astragalus oocarpus A. Gray. San Diego Rattle-weed. Fig. 2823. 



Astragalus oocarpus A. Gray, Proc. Amer. Acad. 6: 213. 1864. 

 Phaca oocarpa Rydb. N. Amer. Fl. 24: 343. 1929. 



Perennial, with flexuous spreading branches 6-8 dm. long, glabrous or the nascent parts 

 sparsely strigose. Stipules deflexed ; leaflets 17-23, oblong to broadly linear, 10-20 mm. long, ob- 

 tuse, green and thickish; racemes loosely many-flowered; calyx campanulate, the tube 3 mm. 

 long, the teeth short, triangular; corolla 8-10 mm. long, creamy white, the keel much incurved, 

 standard longer than the wings, the sides reflexed ; pod erect, glabrous, inflated but firm, 2 cm. 

 long, 1 cm. wide, narrowed but sessile at base, distinctly pointed at apex. 



Alkaline soils, Sonoran Zones; San Diego County, California. Type locality: mountains east of San Diego. 

 April-June. 



50. Astragalus Parishii A. Gray. Parish's Locoweed. Fig. 2824. 



Astragalus Parishii A. Gray, Proc. Amer. Acad. 19: 75. 1883. 



Phaca vallicola Rydb. N. Amer. Fl. 24: 343. 1929. 



Phaca pseudoocarpa Rydb. N. Amer. Fl. 24: 343. 1929. 



Astragalus Douglasii var. Parishii M. E. Jones, Contr. West. Bot. No. 8: 6. 1898. 



Perennial, stems rather stout, ascending from a decumbent base, 5-10 dm. high, sparingly 

 strigose or glabrous. Leaflets 11-25, oblong to elliptic-obovate, 10-25 mm. long, obtuse to retuse, 

 sparsely strigose-canescent, the tube 4 mm. long, the teeth triangular-lanceolate, 1-1 . 5 mm. long ; 

 flowers pale yellow, 8-10 mm. long, the banner strongly reflexed ; pod sessile, strigose, papery, 

 broadly ellipsoid, 4-5 cm. long. 



Hillsides and gravelly flats, Upper Sonoran and Arid Transition Zones; San Gabriel Mountains, southern 

 California, to northern Lower California. Type locality: San Jacinto Mountains, southern California. April-Aug. 



Astragalus Parishii subsp. perstrictus (Rydb.) Abrams. {Phaca perstricta Rydb. N. Amer. Fl. 24: 344. 

 1929.) Pods longer than the species, 5-6 cm. long. San Diego County, California. 



51. Astragalus Peirsonii Munz & McBurney. Peirson's Locoweed. Fig. 2825. 



Astragalus Peirsonii Munz & McBurney, Bull. S. Calif. Acad. 31 : 67. 1932. 



Annual, densely white-strigose throughout, the stems erect, 3-6 dm. high, with a few erect 

 branches. Leaves 5-9 cm. long, with a flattened rachis; leaflets 9-13, oblong or oblong-linear, 

 2-6 mm. long ; peduncles 6-10 cm. long ; flowers in short racemes ; calyx-tube 3-A mm. long, the 

 teeth lanceolate-subulate, 1-1.5 mm. long; corolla rose-purple, 10-12 mm. long; pod 20-25 mm. 

 long, 15 mm. wide, membranous, stramineous and appressed-pubescent. 



Desert sand dunes, Lower Sonoran Zone; Colorado Desert, Imperial County, California. Type locality: 

 sand dunes between Holtville, California, and Yuma, Arizona. March-April. 



52. Astragalus Douglasii (Torr. & Gray) A. Gray. Douglas' Rattle- weed. 



Fig. 2826. 



Phaca Douglasii Torr. & Gray, Fl. N. Amer. 1 : 346. 1838. 

 Astragalus Douglasii A. Gray, Proc. Amer. Acad. 6: 215. 1864. 

 Astragalus tejonensis M. E. Jones, Proc. Calif. Acad. II. 5: 644. 1895. 



Perennial, the stems several to many, decumbent, 5-8 dm. long. Stipules 3-4 mm. long, 

 triangular-subulate ; leaflets 19-27, narrowly elliptic to linear-oblong, obtuse, 1-2 cm. long, rather 

 thick, green and glabrous except for a sparse appressed strigose-pubescence beneath on the mid- 

 rib and margins ; peduncles about equaling the leaves ; racemes loosely few-flowered ; calyx-tube 

 campanulate, the teeth triangular-subulate, a little shorter than the tube; corolla cream-yellow, 



