FABACEAE 623 



surpassing the peduncles in length : calyx hirsute ; lobes lanceolate or oblong-lanceolate, 

 acute, longer than the tube : corolla 6-7 mm. long : pods suborbicular, oblique, about 5 

 mm. long, strongly transversely wrinkled, with a curved beak. 

 In sand, eastern Georgia and Florida. Spring and summer. 



13. Psoralea rhombifolia T. & G. Foliage more or less densely strigose. Roots 

 short or elongated : stems branching at the base, the branches decumbent or prostrate, 1-9 

 dm. long, simple or branched : stipules lanceolate to ovate : leaflets 3, the blades oval- 

 rhomboidal varying to ovate or obovate, or those of the lower leaves suborbicular, 1-3 cm. 

 long, acute or obtuse, sometimes mucronate : racemes head-like, much sliorter than the 

 peduncles : calyx pubescent : lobes lanceolate to oblong-lanceolate ; tube somewhat gibbous 

 on top : corolla dark blue or reddish, about 5 mm. long : pods about 1 cm. long, hirsute, 

 each with a long straight beak. 



In dry soil, Texas and adjacent Mexico. Spring and summer. 



14. Psoralea Americana L. Perennial from a shrubby base, glandular throughout. 

 Stems branched below, the brandies erect or ascending, 6-12 dm. long : stipules lanceo- 

 late : leaflets 3, the blades suborbicular in outline, 1.5-3.5 cm. in diameter, irregularly 

 crenate-dentate, the terminal one broadly cuneate at the base, the lateral ones oblique : 

 racemes shorter than the peduncles which are longer or shorter than the petioles : calyx 

 pubescent ; lobes very unequal, the lower one much longer and broader than the lanceolate 

 upper ones : corolla about 5 mm. long : pods barely exceeding the calyx-lobes. 



In waste places, Florida. Spring to fall. 



15. Psoralea simplex Nutt. Foliage more or less strigose. Roots cylindric or tur- 

 binate : stems erect, 3-6 dm. tall, sometimes branched at the base, paniculate above : 

 stipules subulate-setaceous : leaflets 3, the blades lanceolate or oblong-lanceolate, 2-6 cm, 

 long, mucronate, reticulated : racemes usually shorter than the peduncles : calyx hirsute ; 

 lobes lanceolate or the lower ones oblong, all longer than the tube : corolla fully 1 cm. 

 long : pods about 4 mm. long, broader than long, with a high crest, obliquely wrinkeled, 

 the beak short, upcurved. 



In sandy soil, Arkansas to the Indian Territory, Alabama and Texas. Spring. 



16. Psoralea grdcilis Chapni. Foliage glabrous or sparingly strigillose. Stems 

 usually branched at the base, the branches wiry, ascending or spreading, 2-7 dm. long, 

 simple or sparingly branclied above : stipules linear-lanceolate : leaflets 3, the blades 

 elliptic, oblong or oblong-lanceolate, or some of them on the lower part of the plant 

 broadest above the middle, 1-3.5 cm. long, usually obtuse or retuse, sometimes mucronate : 

 peduncles much longer than the accompanying leaves : racemes 1-3 cm. long : calyx spar- 

 ingly pubescent ; tube campanulate ; the upper lobes triangular or triangular-ovate, mostly 

 shorter than the tube : corolla purplish, 4-5 mm. long : pods suborbicular. 



In sandy pine lands, southern Georgia and Florida. Spring and summer. 



17. Psoralea pedunculata ( Mill. ) Vail. Foliage sti'igillose, sometimes sparingly so. 

 Stems 3-8 dm. tall, simple below or branched at the base, the branches erect or ascend- 

 ing, paniculate above : stipules linear-subulate : leaflets 3, the blades lanceolate to narrowly 

 oblong, or those of the lower part of the stem oblong-oblanceolate, 3-7 cm. long, usually 

 acute : peduncles much longer than the subtending leaves, surpassing the racemes in 

 length : calyx short-pedicelled ; tube campanulate ; the upper lobes lanceolate, acute, 

 longer than the tube : corolla purplish, 5-7 mm. long : pods suborbicular, nearly 5 mm. 

 long, margined, transversely WJ-inkled. [P. melilotoides Michx.'\ 



In sandy soil or dry woods, Indiana to Kansas, North Carolina, Florida and Texas. Spring and 

 summer. 



18. Psoralea Onobrychis Nutt. Foliage softly pubescent or glabrate. Stems erect, 

 1-2 m. tall, branched at least above : stipules nearly subulate : leaflets 3, the blades 

 ovate to ovate-lanceolate, 3-12 cm. long, acuminate, ciliate, rounded at the base : peduncles 

 surpassing the subtending petioles : racemes shorter than the peduncles: calyx campanu- 

 late ; lobes ovate, obtuse, shorter tlian the tube : corolla 5-7 mm. long : pods ovoid. 1cm. 

 long, black, transversely prominently reticulated, twisted at the ajiex. 



Along streams, Ontario to Missouri, South Carolina and Tennessee. Summer. 



19. Psoralea macrophylla Rowlee. Foliage finely pubescent. Stems erect or 

 ascending, 5-9 dm. tall, simple or nearly so : leaflets 3, the blades ovate, 6-10 cm. long, 

 blunt or notched at the apex, undulate, finely reticulated and slightly paler beneath than 

 above, cordate or subcordate at the base, about as long as the petioles or shorter on the 

 lower part of the stem : racemes 10-15 cm. long ; rachis closely pubescent, and with long- 

 stalked glands : pedicels 2-3 mm. long : calyx pubescent like the rachis and pedicels ; 

 lobes lanceolate, acuminate, longer than the tube : corolla 8-9 mm. long. 



In woods, Tryon Mountain, North Carolina. Spring and summer. 



