312 NORTH AMERICAN FLORA [Volume 24 



2. Holcophacos Engelmanni (Sheldon) Rydb.; Small, Fl. SE. U. S. 

 618, 1332. 1903. 



Astragalus dislorlus A. Gray, PI. Wright. 1: 52. 1852. Not A. dislorius T. & G. 1838. 

 Astragalus Engelmanni Sheldon. Minn. Bot. Stud. 1: 152. 1894. 



Astragalus jlagellaris Engeltn.; Sheldon, Minn. Bot. Stud. 1: 152, as synonym. 1894. 

 Astragalus dislorius Engelmanni M. H. Jones. Rev. Astrag. 256. 1923. 



A perennial, with a taproot and cespitose caudex; stems decumbent, glabrous or nearly so, 

 1-3 dm. long; leaves ascending, 3-7 cm. long, the rachis slender, glabrous; stipules lanceolate, 

 green, 3-4 mm. long; leaflets 13-19, oblong to obcordate, 3-8 mm. long, cuneate at the base, 

 rounded to retuse at the apex, glabrous on both sides or sparingly strigulose beneath ; peduncles 

 4-7 cm. long; racemes short, 5-10-flowered; bracts lanceolate, 1-2 mm. long, longer than the 

 pedicels; calyx sparingly strigulose, the tube campanulate, about 2 mm. long, the teeth lance- 

 deltoid, 1-1.5 mm. long; corolla lilac or pink, the keel purple-tipped; banner narrowly obovate, 

 often slightly retuse at the apex, 7-8 mm. long; wings 6 mm. long, the blade oblanceolate, 

 nearly three times as long as the claw; keel-petals shorter and broader, the blade almost 

 semicircular; pod obliquely obovate, glabrous, about 1.5 cm. long, 5-6 mm. wide, the upper 

 suture nearly straight and slightly sulcate, the lower more deeply so and strongly convex. 



Type locality: Brazos, Texas. 



Distribution: Texas, Oklahoma, and Arkansas. 



Illustration: M. E. Jones, Rev. Astrag. pi. 65. 



42. LONCHOPHACA Rydberg, gen. nov. 



Perennial, rush-like herbs, with a short woody cespitose caudex. Leaves odd-pinnate, 

 the leaflets linear or linear-filiform. Flowers perfect, borne in many-flowered elongate racemes. 

 Calyx-tube campanulate, its teeth short Corolla white, ochroleucous, or purplish. Banner 

 oblanceolate, rather moderately arched. Wings shorter. Blade oblong-oblanceolate, scarcely 

 equaling the claw, with a prominent but blunt reflexed auricle. Stamens diadelphous (9 and 

 1), the sheath straight, slightly oblique at the apex, the free portion of the filaments somewhat 

 curved upwards. Pod stipitate, one-celled, coriaceous, the body linear in outline, tapering 

 at both ends, terete or dorso-ventrally compressed, many-seeded, the suture prominent. 

 Seeds almost orbicular in outline, nocched at the deep-seated hilum. 



Type species, Phaca macrocarpa A. Gray. 



Stipe of the fruit longer than the calyx-tube; stem, foliage, and calyx strigose- 

 canescent . 

 Body of the pod nearly linear, tapering at both ends, 3-4 cm. long, about 



4 mm. thick. 1. L. macrocarpa. 



Body of the pod oblanceolate, 2.5-3 cm. long, about 6 mm. thick. 2. L. macro. 



Stipe of the fruit shorter than the calyx-tube. 



Body of the pod 2.5-4 cm. long, linear-oblanceolate, tapering more towards 

 the base than the apex. 

 Pod glabrous, attenuate at each end; corolla 2 cm. long; stem and leaves 



green, slightly strigose. 3. L. Osterhoutii. 



Pod strigose-canescent, acute at each end; corolla 10-12 mm. long. 



purplish; stem and leaves strigose-canescent. 4. L. duchesnensis. 



Body of the pod 2-2.5 cm. long, oblong, equally acute at each end, glabrous; 



corolla white, about 12 mm. long. 5. L. kaibensis. 



1. Lonchophaca macrocarpa (A. Gray) Rydberg. 



Phaca macrocarpa A. Gray, Mem. Am. Acad. II, 4: 36. 1849. 

 Astragalus lonchocarpus Torr. Pacif. R. R. Rep. 4: 80. 1857. 

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

 Homalobus macrocar pus Rydb. Bull. Torrey Club 32: 667. 1906. 



A perennial, with a woody root and short caudex; stems several, striate, strigose, 3-10 

 dm. high, with erect branches; leaves 6-10 cm. long, the rachis strigose, sulcate; stipules deltoid, 

 acute, 3-4 mm. long; leaflets 3-7, linear-filiform, canescent, 1-2 cm. long, 1-2 mm. wide, or the 

 terminal one longer, and continuous with the rachis; peduncles 1-3 cm. long; racemes 1-1.5 

 dm. long, strigose; bracts subulate, 3 mm. long, early deciduous; pedicels recurved, 1-2 mm. 

 long; calyx brownish, strigose, the tube 5-6 mm. long, the teeth deltoid, 1 mm. long; corolla 



