Part 1, 1919] FABACEAE: PSORALEAE 7 



peduncles 4-10 cm. long; racemes 2-5 cm. long, dense; bracts small, linear-lanceolate; calyx 

 sparingly strigose, purple, 3-4 mm. long; lobes lanceolate, acute, a little longer than the tube, 

 the lowest one a little longer than the rest; corolla purple, about 7 mm. long; banner, wings, 

 keel-petals, and stamens as in the preceding; pod obliquely orbicular, flat, transversely wrinkled, 

 with a short incurved beak; seed brown, 2.5 mm. long. 



Type locality: Plains of Red River, Arkansas. 

 Distribution: Alabama to Oklahoma and Texas. 



7. Orbexilum pedunculatum (Mill.) Rydberg. 



Hedysarum pedunculatum Mill. Gard. Diet. ed. S. Hedvsarum no. 17. 1768. 



Trifolium psoralioides Walt. Fl. Car. 184. 1788. 



Psoralea melilotoides Michx. Fl. Bor. Am. 2: 58. 1803. 



Psoralen Melilotus Pers. Syn. PI. 2: 347. 1807. 



Melilotus psoralioides Nut't. Gen. 2: 104. 1818. 



Psoralea eglandulosa Ell. Bot. S. C. & Ga. 2: 198. 1822. 



Lotodes psoralodes Kuntze, Rev. Gen. 194. 1891. 



Psoralea pedunculata Vail. Bull. Torrey Club 21: 114. 1894. Not P. pedunculata Poir. 1816. 



A perennial, often branched at the base, with a fusiform root, which sometimes is 2 cm. 

 thick; stems 3-S dm. high, glabrous or sparingly strigose; leaves 3-foliolate; stipules 4-5 mm. 

 long, subulate; petioles 1-6 cm. long, or the upper much shorter; leaflets 4—7 cm. long, 1-2 cm. 

 wide, linear-lanceolate or those of the lower leaves elliptic, glabrous or sparingly pubescent, 

 reticulate, sparingly dotted with minute glands or spmetimes almost glandless; peduncles 

 8-15 cm. long; racemes elongate, 4—10 cm. long; bracts 1 cm. long, broadly ovate, acuminate, 

 longer than the flowers, deciduous; pedicels about 1 mm. long; calyx strigose, about 3 mm. 

 long; lobes lanceolate, slightly longer than the tube, the lowest one slightly longer than the 

 rest; corolla 5-6 mm. long, pale-purple, otherwise as in the two preceding; pod obliquely orbic- 

 ular, flat, 4 mm. long, transversely wrinkled, with a short incurved beak; seed dark-brown, 3 

 mm. long. 



Type locality': South Carolina. 



Distribution: Virginia to Illinois, Kansas, Texas, and Florida. 



Illustrations: W. Bart. Fl. N. Am. pi. 57; Vent. Jard. Malm. pi. 94; Bot. Mag. pi. 2063; 

 Bot. Reg. 6: pi. 454; Britt. & Brown, 111. Fl. /. 2099; ed. 2. /. 2502. 



8. Orbexilum gracile (Chapm.) Rydberg. 



Psoralea melilotoides gracilis T. & G. Fl. N. Am. 1: 303. 1838. 



Psoralea gracilis Chapm.; (T. & G. Fl. N. Am. 1: 303, as synonym. 1838) Small. Fl. SE. U. S. 623. 

 1903. 



A perennial, often branched at the base, with a fusiform root; stems glabrate or minutely 

 strigose, often purple-tinged, ascending, 2-7 dm. high, slender; leaves 3-foliolate; stipules 

 linear-lanceolate, 5-8 mm. long; petioles of the lower leaves 3-4 cm. long, those of the upper 

 very short; leaflets elliptic-oblong, or linear-lanceolate, 1-4 cm. long, minutely punctate, gla- 

 brous or nearly so, those of the lower leaves obtuse or retuse, those of the upper acute; pedun- 

 cles 6-10 cm. long; racemes 2-4 cm. long, lax; bracts broadly obovate, conspicuously punctate, 

 cuspidate-acuminate, 7-8 mm. long, deciduous; calyx sparingly strigose, 2-2.5 mm. long; 

 upper 4 lobes triangular, shorter than the tube, the lowest lanceolate and a little longer than 

 the tube; corolla 4-5 mm. long; banner suborbicular; blades of the wings obliquely elliptic- 

 oblanceolate, with an acute basal lobe, those of the keel-petals broadly lunate, obtuse, with a 

 minute rounded lobe, two thirds as long as those of the wings; pod similar to that of the pre- 

 ceding. 



Type locality: Middle Florida. 

 Distribution: Georgia and Florida. 



5. HOITA* Rydberg, gen. nov. 



Perennial herbs, with rootstocks, rarely shrubby below. Leaves pinnately 3-foliolate, 

 with entire short-petioluled leaflets, usually conspicuously glandular-punctate. Flowers in 

 long-peduncled, axillary spikes or racemes. Calyx campanulate, not gibbous at the base, 

 glandular-dotted, 5-lobed, the lowest lobe slightly longer than the rest. Corolla purple or ochro- 



* Indian name for the type species, the fiber of which has been used as threads. 



