Part 1, 1919] FABACEAE: PSORALEAE 19 



banner obovate, the basal lobes small, half-round; wings with an oblong basal lobe; pod 1 cm. 

 long, ovate with a broad straight beak ; seed nearly orbicular, dark-brown. 



Type locality: Carolina. 



Distribution: North Carolina to Florida and Alabama. 



2. Pediomelum cyphocalyx (A. Gray) Rydberg. 



Psoralea cyphocalyx A. Gray, Bost. Jour. Nat. Hist. 6: 172. 1850. 

 ? Psoralen' palmata Buckl. Proc. Acad. Phila. 1861: 451. 1862. 

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



A perennial, with a tuberous globular or ellipsoid root sometimes 2 cm. thick; stem 5-10 

 dm. high, simple below, branched above, strigose; leaves digitately 3-5-foliolate; stipules subu- 

 late or linear, 8-10 mm. long; petioles 1-6 cm. long; leaflets linear, 4—10 cm. long, 5-8 mm. 

 wide, with numerous small glands, glabrous above, strigose beneath; peduncles 2-5 cm. long; 

 spikes short and dense, 2-4 cm. long; bracts lanceolate or ovate-cuspidate, 6-8 mm. long, con- 

 spicuously glandular-punctate; calyx about 8 mm. long; lobes lanceolate, acuminate, nearly 

 equal; corolla about 1.5 cm. long, similar to that of the preceding; pod rounded-ovoid, with a 

 broad straight beak, 8 mm. long, densely punctate, sparingly strigose; seed dark-brown, nearly 

 orbicular, compressed. 



Type locality: Rocky prairies on the Cibolo [Texas]. 

 Distribution: Texas. 



3. Pediomelum Reverchoni (S. Wats.) Rydberg. 



Psoralea Reverchoni S. Wats. Proc. Am. Acad. 21: 447. 1886. 



A perennial, with a tuberous root; stem 5-8 dm. high, strigose-canescent, branched; leaves 

 digitately 3-5-foliolate; stipules subulate, 3 mm. long; petioles 3-6 mm. long; leaflets 1.5-4 

 cm. long, 5-8 mm. broad, elliptic to linear-oblong, acute at each end, copiously and minutely 

 glandular-dotted, glabrate above, sparingly strigose beneath; peduncles 1-2 cm. long; spikes 

 short, dense; bracts 1-1.5 cm. long, broadly ovate, caudate-cuspidate, strigose, glandular- 

 punctate; flowers subsessile; calyx 1-1.5 cm. long, hirsute and ciliate; lobes lance-linear, acu- 

 minate, the upper four about 8 mm. long, the lowest one 1 cm. long or more; corolla about 1.5 

 cm. long; banner oblanceolate, slightly retuse at the apex; wings with an ovate basal lobe. 



Type locality: Hood County, Texas. 

 Distribution: Texas and Oklahoma. 



4. Pediomelum cuspidatum (Pursh) Rydberg. 



Psoralea cuspidata Pursh, Fl. Am. Sept. 741. 1814. 



Psoralea macrorrhiza Nutt.; (Fraser, Cat.; hyponym. 1813) Pursh, Fl. Am. Sept. 741, as synonym. 



1814. 

 Psoralea cryptocarpa T. & G. Fl. N. Am. 1: 301. 1838. 

 ? Psoralea Roemeriana Scheele, Linnaea 21: 463. 1848. 

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

 Psoralea aromatica Payson, Bot. Gaz. 60: 379. 1915. 



A perennial, with a fusiform or ellipsoid root; stem 1-6 dm. high, stout, branching, spar- 

 ingly strigose or glabrate below; leaves digitately 5-foliolate; stipules lanceolate, 1-2 cm. long; 

 petioles 2-3 cm. long; leaflets 2-4 cm. long, elliptic to obovate, finely glandular-punctate, 

 glabrous above, strigose beneath, mucronate; peduncles 3-7 cm. long; spikes dense and short; 

 bracts 1-1.5 cm. long, lanceolate, cuspidate-acuminate; calyx strigose and punctate, about 

 1 cm. long; lobes lanceolate, acuminate, the upper four 3-4 mm. long, the lowest 5-6 mm. long; 

 corolla about 1.5 cm. long, similar to that of the preceding; pod ovoid, without the beak 6 

 mm. long; seed oval, 5 mm. long. 



Tyte locality: Upper Louisiana [now South or North Dakota]. 

 Distribution: Minnesota to Montana, Arkansas, and Texas. 

 Illustrations: Britt. & Brown, 111. Fl./. 2095; ed. 2./. 249 S. 



5. Pediomelum caudatum Rydberg, sp. nov. 



A perennial, with a tuberous root ; stem 3-5 dm. high, sparingly strigose, or glabrate below, 

 terete, with spreading branches; leaves digitately 5-foliolate; stipules subulate, 12-15 mm. long. 



