PEA FAMILY 585 



7-8 mm. long, banner well exceeding the keel, strongly arched beyond the calyx ; pod half-ovoid, 

 2.5-3.5 cm. long, about 2 cm. wide, the upper suture somewhat intruding. 



Dry hillsides and mesas, Upper Sonoran and Transition Zones; Coast Ranges, Monterey and San Luis 

 Obispo Counties, to the Tehachapi Mountains, California. Type locality, originally collected by Douglas, prob- 

 ably on his excursion from Monterey to Santa Barbara. March-May. 



Astragalus Douglasii var. megalophysus (Rydb.) Munz & McBurney, Bull. S. Calif. Acad. 31: 65. 

 1932. (Phaca megalophysa Rydb. N. Amer. Fl. 24: 344. 1929.) Resembling the typical species in general 

 habit and calyx characters but corolla 10 mm. long and pods 5-6 cm. long. Desert slopes of the San Gabriel 

 Mountains, southern California. 



53. Astragalus macrodon (Hook. & Arn.) A. Gray. Salinas Rattle- weed. 



Fig. 2827. 



Phaca macrodon Hook. & Arn. Bot. Beechey 333. 1841. 

 Astragalus macrodon A. Gray, Proc. Amer. Acad. 6: 216. 1864. 

 Astragalus holosericeus M. E. Jones, Proc. Calif. Acad. II. 5: 638. 1895. 



Perennial, the stems branched at the base, 3-6 dm. high, herbage densely villous-pubescent. 

 Stipules distinct, lanceolate-subulate, reflexed; leaflets more or less distinct, 17-23, linear or 

 linear-oblong, 1-2 cm. long, acute ; racemes rather loosely flowered ; flowers soon reflexed ; calyx- 

 tube campanulate, 4-5 mm. long, the teeth subulate equaling the tube; corolla yellowish white, 

 8 mm. long, the banner and the keel strongly arched; pods sessile, reflexed, half -ovoid, 2.5-3 cm. 

 long, densely soft-pubescent. 



Dry hillsides and mesas, Upper Sonoran Zone; Upper Salinas Valley, Monterey County, to San Luis Obispo 

 County. California. Type locality: originally collected by Douglas, presumably on his trip from Monterey to 

 Santa Barbara. April-June. 



54. Astragalus pomonensis M. E. Jones. Pomona Rattle-weed. Fig. 2828. 



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

 Phaca pomonensis Rydb. N. Amer. Fl. 24: 346. 1929. 



Stems several from the perennial root, decumbent, 6-10 dm. long, the whole plant very 

 sparsely pubescent. Stipules distinct ; leaves 15-20 cm. long ; leaflets 25-37, oblong-elliptic, 15-25 

 mm. long; racemes 5-8 cm. long, on stout peduncles; calyx-tube 4 mm. long, pubescent with 

 blackish hairs ; corolla cream-colored, 10-12 mm. long ; pods much inflated, 3-5 mm. long, ob- 

 lique, ending in a short deltoid apex ; seeds 2 mm. long, light brown. 



Dry plains and hills, Upper and Lower Sonoran Zones; interior valleys of southern California. Type 

 locality: Fallbrook, San Diego County, California. March-June. 



55. Astragalus Menziesii A. Gray. Menzies' Rattle-weed. Fig. 2829. 



Phaca densifolia Smith in Rees, Cycl. 27: No. 9. 1814. Not A. densifolius Lam. 

 Phaca Nuttallii Torr. & Gray, Fl. N. Amer. 1 : 343. 1838. Not A. Nuttallii DC. 1825. 

 Astragalus Menziesii A. Gray, Proc. Amer. Acad. 6: 217. 1864. 

 Astragalus vestitus var. Menziesii M. E. Jones, Rev. N. Amer. Astrag. 110. 1923. 



Stems several from a perennial base, decumbent or ascending, leafy. Stipules connate, often 

 1 cm. long; leaflets 13-19 pairs, 6-20 mm. long, elliptic, cuneate at base, usually retuse at apex, 

 more or less cinereous-pubescent ; peduncles about 1 dm. long ; flowers reflexed ; calyx-tube 4 mm. 

 long, sparsely pubescent, the teeth subulate, barely 2 mm. long; corolla greenish cream-colored, 

 10-12 mm. long ; pod papery, much inflated, 3-5 cm. long, 2-3 cm. thick and wide, obliquely ovoid ; 

 seeds 4 mm. long. 



Coastal species ranging from Monterey to southern California. Type locality: Monterey, California. April- 

 Sept. 



Astragalus Menziesii subsp. virgatus (A. Gray) Abrams. {A. Crotalariae var. virgatus A. Gray, Bot. 

 Calif. 1: 149. 1876; A. franciscanus Sheldon, Minn. Bot. Studies 1: 135. 1894.) Stems sparsely villous; 

 leaflets green, sparingly villous on the veins beneath and sometimes on the margin; pods glabrous or sparsely 

 strigose. Hillsides and bluffs, mainly Transition Zone; Mendocino County to San Mateo County, California. 



56. Astragalus miguelensis Greene. San Miguel Locoweed. Fig. 2830. 



Astragalus miguelensis Greene, Pittonia 1 : 33. 1887. 



Phaca miguelensis Rydb. N. Amer. Fl. 24: 348. 1929. 



Astragalus vestitus var. miguelensis Jepson, Fl. Calif. 2: 352. 1936. 



Perennial, branched from the base, the branches 15-30 cm. long, the whole plant hoary with 

 a densely matted short woolly pubescence. Leaves 4-8 cm. long; leaflets 19-23, approximate, 

 round-oval to broadly elliptic, 6-12 mm. long, peduncles scarcely equaling the leaves ; racemes 

 rather densely flowered, about 3 cm. long in flower ; calyx narrowly campanulate, about 6 mm. 

 long, the teeth subulate-lanceolate, about equaling the tube ; corolla ochroleucous, 12 mm. long, 

 nearly straight ; pods 25-30 mm. long, about 15 mm. wide, and as thick, rounded at base, abruptly 

 short-pointed at apex, woolly-pubescent. 



Channel Islands, southern California. Type locality: San Miguel Island. May-Sept. 



57. Astragalus microcystis A. Gray. Small-pod Locoweed. Fig. 2831. 



Astragalus microcystis A. Gray, Proc. Amer. Acad. 6: 220. 1864. 

 Tragacantha microcystis Kuntze, Rev. Gen. PI. 964. 1891. 



Perennial with a woody cespitose caudex, the stems diffusely branched, decumbent or pro- 

 cumbent, 2-3 dm. long, strigose. Leaves 3-6 cm. long ; leaflets 9-13, oblong or lanceolate-elliptic, 



