Part 5, 1929] FABACEAE: GALEGEAE 311 



long, spreading; stipules pubescent, searious, broadly ovate or suborbicular, 5-8 mm. long; 

 leaflets 3, rarely 5, oblanceolate to cuneate, 5-10 mm. long, silvery-silky on both sides; pe- 

 duncles about 1 cm. long, arcuate; racemes 1-4-flowered; bracts 1 cm. long, lanceolate; calyx 

 campanulate, silky-canescent, the tube campanulate, 2 mm. long, the teeth subulate, 2 mm. 

 long; corolla purple, in drying turning yellowish, 6-7 mm. long; banner broadly obovate, 

 notched, abruptly arched at the middle; wings slightly shorter, the blade obliquely obovate, 

 with an acute basal auricle and a slender claw; keel-petals much shorter, the blade broadly 

 lunate, rounded at the apex; pod ovoid, scarcely exceeding the calyx, turgid, 4—5 mm. long, 

 sericeous. 



Type locality: High hills of the Platte, near the Rocky Mountains [probably Wyoming|. 

 Distribution: Plains, western Nebraska. Wyoming, and northeastern Colorado. 

 Illustrations: Fl. Neb. 21: pi. 11, f. 92-97; Britt. & Brown, 111. Fl. /. 2155; ed. 2. /. 2161; 

 M. E. Jones, Rev. Astrag. pi. 6, f. 21; Contr. W. Bot. 10: pi. 1. 



41. HOLCOPHACOS Rydb.; Small, Fl. SE. U. S. 618, 1332. 1903. 



Perennial herbs, with a taproot and a cespitose caudex. Leaves odd-pinnate, with many 

 leaflets. Flowers perfect, in short head-like racemes. Calyx campanulate, the teeth subulate 

 or lanceolate, shorter than the tube. Corolla lilac, pink or white. Banner broadly obovate, 

 strongly arched, retuse at the apex. Wings much shorter than the banner, the blade oblanceo- 

 late, falcate, longer than the claw, with a reflexed rounded basal auricle. Keel-petals slightly 

 shorter, the blade lunate-obovate, about one-third of a circle, longer than the claw. Stamens 

 diadelphous (9 and 1), the sheath straight to near the apex, the free portion of the filaments 

 arched upwards. Ovary sessile, glabrous, the style regularly arched upwards, glabrous. Pod 

 sessile, glabrous, more or less arched, membranous, sulcate on both sutures, but not forming a 

 false partition. Seeds numerous, obliquely reniform. 



Type species, Astragalus distortus T. & G. 



Pod lunate in outline, deeply sulcate on both sutures, 2-3 cm. long. 1. H. distortus. 



Pod obliquely obovoid. nearly straight on the upper suture, about 1.5 cm. long, 



the sutures less deeply sulcate. 2. H . Engelmanni. 



1. Holcophacos distortus (T. & G.) Rydb.; Small, Fl. SE. U. S. 618, 

 1332. 1903. 



Astragalus distortus T. & G. Fl. N. Am. 1: 333. 1838. 



Phaca debilis Nutt.; T. & G. Fl. N. Am. 1: 345. 1838. 



Astragalus debilis A. Gray; S. Wats. Bibl. Index 192. 1878. 



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



Tragacantha distorta Kuntze, Rev. Gen. 944. 1891. 



Homalobus debilis Rydb. Bull. Torrey Club 40: 53, in part. 1913. 



A perennial, with a taproot and cespitose caudex; stems many, ascending or decumbent, 

 glabrous or sparingly strigose, 1-3 dm. high; leaves ascending, 5-10 cm. long, the rachis gla- 

 brous or nearly so ; stipules lance-deltoid, 4-7 mm. long, green; leaflets 13-25, oblong to obovate, 

 cuneate at the base, rounded or the earlier ones retuse at the apex, light green, glabrous above, 

 strigulose or glabrate beneath, 4—10 mm. long; peduncles 6- 10 cm. long, slender; racemes short, 

 2-4 cm. long, 10-20-flowered; bracts lanceolate, 2 mm. long, longer than the pedicels; calyx 

 strigose with black or white hairs, the tube campanulate, 2-3 mm. long, the teeth lanceolate, 

 about 2 mm. long; corolla white or lilac, with purple- tipped keel; banner narrowly obovate 

 or oval, retuse at the apex, 10-12 mm. long; wings 8-9 mm. long, the blade obliquely oblanceo- 

 late, arcuate, twice as long as the claw, with a large reflexed auricle; keel-petals slightly shorter, 

 the blade broadly obliquely obovate-lunate, shorter and broader, with a smaller auricle; pod 

 lunate in outline, tapering at each end, 2-3 cm. long, 4-4.5 mm. wide, glabrous, cross-reticulate, 

 turgid, both sutures strongly sulcate and nearly meeting, but without a septum; cross-section 

 <» -shaped. 



Type locality: Arkansas. 



Distribution: Illinois to Iowa, Kansas. Texas, Mississippi, and West Virginia. 

 Illustrations: M. E. Jones. Rev. Astrag. pi. 64, f. 215 (but cross-section faulty); Britt. & 

 Brown. 111. Fl. /. 2143; ed. 2. /. 2545; Am. Jour. Bot. 15: pi. 45 F. 



