20 NORTH AMERICAN FLORA [Volume 24 



submembranous; petioles 2-3.5 cm. long; leaflets 2-4 cm. long, broadly oblanceolate, rounded 

 and cuspidate at the apex, glabrous above, strigose beneath, with numerous minute glands; 

 peduncles 5-8 cm. long, grayish-strigose; spikes dense, 4-6 cm. long; bracts linear-lanceolate, 

 caudate-attenuate, 15-25 mm. long, longer than the calyx; calyx glandular-punctate and spar- 

 ingly hirsute; tube 5-6 mm. long; upper four lobes lanceolate, attenuate, 6 mm. long, the lowest 

 narrowly lanceolate, caudate-attenuate, 8-10 mm. long; corolla 15-16 mm. long, similar to 

 that of the preceding; pod ovoid, thin-walled, glandular-punctate, the beak flattened, as long 

 as the body. 



Type collected in sandy soil, Dallas County, Texas, May, Reverchon [Curtiss's distribution no.] 

 563** (herb. Columbia Univ.). 



Distribution: Middle Texas. 



6. Pediomelum subacaule (T. & G.) Rydberg. 



Psoralea subacaulis T. & G. Fl. N. Am. 1: 302. 1838. 

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



A subacaulescent perennial, with a fusiform tuberous root 5-10 cm. long, 1-3 cm. thick; 

 stem above ground very short; leaves digitately 5-7-foliolate, clustered at the base; stipules 

 ovate, scarious, 1-2 cm. long; petioles 4—8 cm. long, hirsute-villous; leaflets 1.5-4 cm. long, 

 6-10 mm. wide, oblanceolate or oblong-oblanceolate, obtuse or acute, glabrous except the ciliate 

 margins and mid veins beneath; peduncles 4— 1 cm. long, villous-hirsute; spikes dense, 2-6 cm. 

 long; bracts ovate-lanceolate, 1-1.5 cm. long, ciliate; calyx hirsute; tube 3 mm. long; upper four 

 lobes triangular, very short, acute, the lowest one obovate or spatulate, rounded or obtuse at 

 the apex, 3 mm. long; corolla purple, 12-15 mm. long, similar to that of P. cuspidatum; pod 

 hirsute, ovoid, the flat beak shorter than the body. 



Type locality: Nashville, Tennessee. 

 Distribution: Tennessee. 



7. Pediomelum esculentum (Pursh) Rydberg. 



Psoralea esculenla Pursh, Fl. Am. Sept. 475. 1814. 



Psoralea brachiatn Dougl.; Hook. Fl. Bor. Am. 1: 137. 1831. 



Lolodes esculentum Kuntze, Rev. Gen. 194. 1891. 



A perennial, with a fusiform to subglobose tuberous root 5-10 cm. long, 2-4 cm. thick; 

 stem erect, 1-3 dm. high (rarely subacaulescent), simple or with a few ascending-spreading 

 branches, hirsute with long spreading or reflexed hairs; leaves digitately 5-foliolate; stipules 

 herbaceous, 1-2 cm. long, lanceolate or ovate-lanceolate; petioles 5-10 cm. long, hirsute; 

 leaflets 2-6 cm. long, 1-2.5 cm. wide, oblong to obovate, obtuse, or rounded, rarely acutish at 

 the apex, sometimes mucronate, glabrous above, hirsute beneath; peduncles 5-10 cm. long; 

 spikes dense, 3-8 cm. long; bracts 1-1.5 cm. long, ovate-lanceolate, acuminate, hirsute; calyx 

 hirsute; tube 4—5 mm. long; lobes lanceolate, acute or acuminate, 7-8 mm. long, subequal, the 

 lowest slightly broader, the upper two more united; corolla 15-17 mm. long; banner broadly 

 oblanceolate, slightly retuse at the apex; pod hirsute, ovoid, the flat beak three times as long 

 as the body;^eed 6 mm. long, black. 



Type locality: Banks of the Missouri [Montana]. 



Distribution: Manitoba to Alberta, Wyoming, Oklahoma, Missouri, and Wisconsin. 

 Illustrations: Pursh, Fl. Am. Sept. pi. 22; Hook. Fl. Bor. Am. 1: pi. 53; Britt. & Brown, 111. 

 Fl. /. 2096; ed. 2./. 2499. 



8. Pediomelum subulatum (Bush) Rydberg. 



Psoralea esculenla /3 T. & G. Fl. N. Am. 1: 302, in part. 1838. 

 Psoralea subulata Bush, Rep. Mo. Bot. Card. 17: 120. 1906. 



A subacaulescent perennial, with an oval tuberous root 2-2.5 cm. thick; stem above ground 

 almost none, hirsute; leaves clustered at the base, digitately 5-foliolate; stipules ovate to lanceo- 

 late, membranous; petioles 1-2 dm. long, hirsute; leaflets obovate, obtuse or rounded at the 

 apex, mucronate or cuspidate, long-hirsute beneath, sparingly so or glabrate above, 3-6 cm. 

 long, 2-2.5 cm. wide; peduncles 5-10 cm. long, reclining or curving upwards; spikes oblong, 

 dense, 5-8 cm. long; bracts lanceolate, 6-8 mm. long; calyx hirsute; tube 5 mm. long; upper 



