432 NORTH AMERICAN FLORA [Volume 24 



calyx strigose, the tube about 1.5 mm. long, the teeth 1 mm. long; corolla tipped with purple, 

 4-5 mm long; pod arcuate, 10-12 mm. long, 2 mm. wide and thick, strigose, slightly sulcate 

 on the lower suture. 



Type locality: Cedros Island, Lower California. 

 Distribution: Lower California. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 68. 



6. Acutirostres. Annuals or sometimes short-lived perennials; stem branched below; 

 racemes with rather small flowers; calyx-tube short, campanulate, at least equaling the teeth; 

 keel-petals with a distinct beak; pod flattened, erect or strongly ascending, slightly falcate. 



43. Hamosa nothoxys (A. Gray) Rydb. Bull. Torrey Club 

 54:330. 1927. 



Astragalus nothoxys A. Gray, Proc. Am. Acad. 6: 232. 1864. 

 Tragacantha nothoxys Kuntze, Rev. Gen. 946. 1891. 

 Oxytropis nothoxys M. E. Jones, Proc. Calif. Acad. II. 5: 677. 1895. 

 Spiesia nothoxys M. E. Jones, Proc. Calif. Acad. II. 5: 677. 1895. 

 Aragallus nothoxys A. Heller, Cat. N. Am. PI. 4. 1898. 



An annual or perennial, branched at the base; stems several, decumbent at the base, 1-4 

 dm. high, sparingly strigose or glabrate; leaves ascending, 3-8 cm. long; stipules lanceolate, 

 2-4 mm. long; leaflets 13-19, obovate or oval, rounded or retuse at the apex, 4—10 mm. long, 

 glabrous above, strigulose beneath; peduncles 5-15 cm. long; racemes 2-8 cm. long, short in 

 flowers, elongate in fruit; bracts lanceolate, 2 mm. long; calyx canescent-strigose', often with a 

 few black hairs, the tube 4-5 mm. long, the teeth subulate, about 2 mm. long; corolla white 

 or tipped with purple, about 1 cm. long; banner broadly obovate, slightly retuse, abruptly 

 arcuate; wings nearly as long, the blade oblong below, spatulate above, with a basal auricle; 

 wing-petals much shorter, the blade semiorbicular, acuminate, the beak erect, the basal 

 auricle rounded; pod erect or ascending, 1.5—2 cm. long, 3 mm. wide, and 2.5 mm. thick, 

 acuminate, minutely strigose, deeply cordate in cross-section. 



Type locality: San Luis Mountains, Sonora. 

 Distribution: Arizona, Sonora, and Chihuahua. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 69, f. 242. 



44. Hamosa acutirostris (S. Wats) Rydb. Bull. Torrey Club 

 54:331. 1927. 



Astragalus acutirostris S. Wats. Proc. Am. Acad. 20: 360. 1885. 

 Astragalus slreptopus Greene, Bull. Calif. Acad. 1: 155. 1885. 

 Oxytropis acutirostris M. E. Jones, Proc. Calif. Acad. II. 5: 677. 1895. 

 Aragallus acutirostris A. Heller, Cat. N. Am. PI. 4. 1898 



An annual; stem 0.5-3 dm. long, branched at the base, terete, decumbent, strigose; leaves 

 2-3 cm. long, ascending; stipules ovate or lanceolate, 1-2 mm. long; leaflets 9-15, oblong to 

 obovate, retuse at the apex, cuneate at the base, pubescent beneath with somewhat kinked 

 hairs, 5-8 mm. long, thickish; peduncles 4-8 cm. long; racemes 2-4 cm. long, 3-5-flowered; 

 bracts lanceolate, 1 mm. long; pedicels very short; calyx more or less black-hairy, the tube 1.5 

 mm. long, the teeth subulate, of about the same length; corolla whitish or purple-tipped, 

 4-5 mm. long; banner obovate; wings slightly shorter, the blades obovate; keel-petals about as 

 long, broadly lunate, acuminate, the tip erect; pod slightly arcuate, 1.5-2 cm. long, 3 mm. 

 wide, minutely strigose, reticulate, acute at each end, sulcate on the lower suture, cordate in 

 cross-section. 



Type locality: Brown's Rranch, Mohave Desert. 

 Distribution: Mohave Desert. California. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 69, f. 241. 



7. Hartwegianae. Leafy-stemmed perennials; stem simple; racemes elongate, many- 

 flowered; flowers small, reflexed, 5-7 mm. long; calyx-tube short, campanulate, the teeth 

 subulate; banner strongly arched; pod reflexed, oblong or lance-oblong, deeply triangular- 

 cordate in cross-section. 



