428 NORTH AMERICAN FLORA [Volume 24 



thick and wide, tapering at each end, strigulose, slightly sulcate on the lower sutures, tri- 

 angular-cordate in cross-section. 



Type locality: Mendocino County, California, north of Mad River. 



Distribution: Mendocino to Butte County, California. 



Illustrations: M. E. Jones, Rev. Astrag. pi. 68. f, 238; Jepson, Man. Fl. PI. Calif./. 571. 



29. Hamosa rattanoides (M. E. Jones) Rydb. Bull. Torrey Club 



54: 324. 1927. 



Astragalus letter rattanoides M. E. Jones, Rev. Astrag. 268. 1923. 



A slender annual; stem glabrous or sparingly strigose, 2-3 dm. high, striate; leaves ascend- 

 ing, 5-8 cm. long; stipules lanceolate, acuminate, 4-5 mm. long; leaflets 7-17, linear, 8-15 mm. 

 long, 1-2 mm. wide, glabrous above, sparingly strigose beneath, acute or those of the lower 

 leaves obtuse; peduncles 4-7 cm. long, slender; racemes subcapitate, 5- 1 0-flowered ; bracts 

 ovate, 1 mm. long; calyx black -hairy, the tube 2 mm. long, the teeth subulate, fully 1 mm. 

 long; corolla 8-10 mm. long, bluish-purple, striate with darker veins, similar to that of H. 

 tenera; pod arcuate, linear, tapering at each end, strigulose, not mottled, 1.5-2 cm. long, 2-2.5 

 mm. wide and thick, sulcate on the lower suture, cordate in cross-section. 



Type locality: Mount Eden, California. 

 Distribution: Central California. 

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



30. Hamosa Lindheimeri (A. Gray) Rydb.; Small, Fl. SE. U. S. 



617, 1332. 1903. 



Astragalus Lindheimeri A. Gray, PI. Wright. 1: 52. 1852. 

 Tragacanlha Lindheimeri Kuntze, Rev. Gen. 946. 1891. 



A branched annual; stems diffuse, 2-4 cm. long, striate, sparingly strigose or glabrate; 

 leaves 5-7 cm. long, spreading; stipules lanceolate, 4-5 mm. long; leaflets 13-17, oblong- 

 cuneate to suborbicular, usually emarginate, sometimes truncate at the apex, cuneate at the 

 base, 5-10 mm. long, glabrous above, sparingly strigose beneath, especially on the veins and 

 margins; peduncles 3-5 cm. long, ascending; racemes short, 5-1 0-flowered; bracts subulate, 

 5 mm. long; pedicels 1-2 mm. long, the teeth subulate, 3-4 mm. long; corolla rose-purple; 

 banner obovate, 12-13 mm. long, emarginate; wings 10-11 mm. long, the blade oblanceolate, 

 somewhat emarginate, 3-4 times as long as the claw, the basal auricle small, reflexed; keel- 

 petals 9-10 mm. long, the blade nearly semicircular, acutish, with a reflexed auricle; pod about 

 3 cm. long, 5-6 mm. wide, glabrous, strongly flattened, abruptly arched near the base. 



Type locality: Along the Santa Clara, 10 miles south of New Braunfels, Texas. 



Distribution: Texas. 



Illustration: M. E. Jones, Rev. Astrag. pi. 67, f. 235. 



31. Hamosa leptocarpa (T. & G.) Rydb.; Small, Fl. SE. U.S. 

 617, 1332. 1903. 



Astragalus leplocarpus T. & G. Fl. N. Am. 1: 334. 1838. 

 Tragacanlha leptocarpa Kuntze, Rev. Gen. 946. 1891. 



Slender annual; stem at first simple, later branched at the base, 1-3 dm. high, sparingly 

 strigose; leaves ascending, 3-6 cm. long; stipules lance-subulate, 4 mm. long; leaflets 11-19, 

 cuneate-elliptic to cuneate-obovate, retuse at the apex, glabrous above, sparingly strigose on 

 the midrib and margins beneath, 5-10 mm. long; peduncles 5-10 cm. long; racemes 2-4 cm. 

 long, 5-12-flowered; bracts subulate, 2 mm. long; calyx strigose, the tube about 2 mm. long, 

 the teeth subulate, of the same length; corolla purple; banner obovate, retuse, 9-1 1 mm. long; 

 wings 6-8 mm. long, the blade obliquely oblanceolate, somewhat arcuate, rounded at the apex, 

 the auricle reflexed; keel-petals 5-6 mm. long, the blade broadly lunate, the tip slightly porrect, 

 acutish or obtuse; pod linear, glabrous, straight or nearly so, compressed, 2.5-3 cm. long, 2 mm. 

 wide, the lower suture slightly sulcate. 



Type locality: Near the Sabine River, Texas. 

 Distribution: Texas and southwestern Arkansas. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 68. f. 236. 



