354 NORTH AMERICAN FLORA [Volume 24 



lance-oblong to elliptic, acute, 6-10 mm. long, 2-3 mm. wide, sparingly strigose beneath, 

 glabrate above; peduncles 1-4 cm. long; racemes 5-8-flowered; calyx strigose with black hairs, 

 the tube 2 mm. long, the lobes 1 mm. long; corolla purple, 6-7 mm. long; banner obovate; 

 wing-petals slightly shorter, the blade obliquely oblanceolate, with a large acute basal auricle; 

 keel- petals similar but more arcuate; pod strigose, sessile, 1-1.5 cm. long, 7-9 mm. wide, 

 obliquely ovoid, acute on the nearly straight upper suture. 



Type locality: Cedros Island, Lower California. 

 Distribution: Cedros Island, Lower California. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 10, f. 47. 



65. Phaca arida (A. Gray) Rydberg. 



Astragalus aridus A. Grav, Proc. Am. Acad. 6: 223. 1864. 

 Tragacantha arida Kuntze, Rev. Gen. 943. 1891. 

 Astragalus albaius Sheldon, Minn. Bot. Stud. 1: 128. 1894. 



Annual; stem 1-2 dm. high, erect, branched, densely white-strigose; leaves 4-6 cm. long, 

 the rachis strigose; stipules deltoid, acuminate, distinct, 2-3 mm. long; leaflets 9-13, oblong, 

 8-15 mm. long, obtuse, white-silky-strigose; peduncles 2-5 cm. long; racemes 5-8-flowered; 

 calyx white-silky, the tube 2 mm. long, the lobes subulate, 1 mm. long; corolla ochroleucous, 

 5-6 mm. long, like that of P. annua; pod 10-12 cm. long, 5-6 mm. wide, white-silky, sessile, 

 obliquely ovate, the lower suture gibbous, the upper acute and nearly straight; seeds like those 

 of P. annua. 



Type locality: Between the mouth of the Gila River and San Diego, California. 

 Distribution: Southern California and Lower California. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 9. f. 37. 



66. Phaca Vaseyi (S. Wats.) Rydberg. 



Astragalus Vaseyi S. Wats. Proc. Am. Acad. 17: 370. 1882. 



Annual or biennial; stem 2-4, rarely 5-6 dm. high, striate, stiigose-canescent, branched; 

 leaves 5-10 cm. long, the rachis strigose; stipules distinct, triangular, 3 mm. long; leaflets 13-21, 

 oblong to elliptic, 5-15 mm. long, 2-6 mm. wide, silky-strigose on both sides, often silvery- 

 white; peduncles 6—10 cm. long, silky-strigost ; racemes including the peduncle 5-20 cm. long, 

 many -flowered ; calyx silvery-strigose, the tube fully 3 mm. long, the lobes subulate, 2 mm. long; 

 corolla purplish, 10-12 mm. long; banner obovate, retuse; wings shortei, the blade oblong, 

 longer than the claw, with a large basal auricle; keel-petals rounded at the apex; legume sessile, 

 strigose, 15-18 mm. long, 6-7 mm. wide, gibbous on the lower suture, acute and nearly straight 

 on the upper. 



Type locality: Mountain Springs. San Diego County. California. 

 Distribution: Southern California, northwestern Sonora, and Lower California. 

 Illustration: M. E. Jones, Rev. Astrag. pi. V,f. 42. 



67. Phaca metana (M. E- Jones) Rydberg. 



Aslraglus metanus M. E. Jones, Proc. Calif. Acad. II. 5: 666. 1895. 



Perennial; stem decumbent at the base, 3-6 dm. high, more or less canescent-strigose, 

 striate; leaves 10-15 cm. long, ascending; stipules deltoid, 4-5 mm. long, canescent; leaflets 

 15-21, oblong to oval, 1-4 cm. long, 4-8 mm. wide, densely canescent-strigose when young, 

 greener in age, mostly rounded at the apex; peduncles 1 dm. long or more: racemes elongate, 

 about as long, many-floweied; bracts lanceolate, 3-4 cm. long, more or less black-hairy; 

 pedicels short; calyx black-hairy, the tube 3 mm. long, the teeth subulate, nearly 2 mm. long, 

 corolla dark-purplish-blue, 8- 10 mm. long; banner obovate, porrect; wings somewhat shorter; 

 the blade oblong, with a large basal auiicle; blade of the keel-petals broadly lunate, obtuse; 

 pod obliquely ovoid, turgid, finely strigose, 1-1.5 cm. long and 8-10 cm. wide, the upper suture 

 straight and acute. 



Type locality: Hanson's Ranch. Lower California, near the border. 

 Distribution: Southern California and northern Lower California. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 0, /. 41. 



