Spring Flora of Oklahoma 
77 
racemes usually many-flowered. Pod ovoid, glabrous, light brown, 
covered with darker glands. 
Prairies. May-October. Common. 
4. Psoralea linearifolia T. & G. Narrow-leaved Psoralea. 
Stems not always glandular, glabrous, or sparingly pubescent with 
appressed hairs. Leaves sessile or short petioled, 1-3-foliolate, 5"-15" 
long, l"-2" wide, linear, rugose, glandular, glabrous, or with a few 
appressed hairs. Flowers blue, loosely scattered. Pod 4" long, 
narrowly ovoid or oblong, glandular. 
Prairies. Mpy-August. Western part of state. 
5. Psora T ea digitata Nutt. Digitate Psoralea. Canescent with 
appressed hairs, widely branching. Leaflets 5, or of the upper leaves 
3, digitate. Flowers blue, spiked. Pod ovoid, flattish, pubescent. 
Prairies and hills. May-July. Kingfisher and Harmon counties. 
6. Psoralea argophylla Pursh. Silver-leaf Psoralea. Densely 
silvery-pubescent, with white appressed hairs throughout, widely 
branched. Stem often zigzag. Leaflets 3-5, digitate, oval, oblong or 
obovate, mucronate. Flowers blue, spiked. Oalyx-tube about 1" 
long, the lower tooth about twice as long as the upper teeth. Pod 
ovate. 
Prairies. May-August. Kingfisher County. 
7. Psoralea cuspidata Pursh. Large-bracted Psoralea. 
Branched, finely appressed-pubescent, from a long, deep, tuberous- 
thickened root. Leaflets 5, digitate, entire, oblanceolate or oval. 
Spikes oblong, dense. Bracts lanceolate, long-cuspidate, equaling or 
exceeding the bluish corolla. Pod oval, enclosed in the calyx. 
Prairies. May-June. Common. 
8. Psoralea esculenta Pursh. Prairie Apple or Turnip. Rather 
stout from a large, turnip-shaped, starchy, edible root. Stem densely 
villous-pubescent with whitish hairs. Leaflets 5, digitate, oval or 
obovate, entire. Spikes oblong, dense. Bracts lanceolate, nearly 
equaling the bluish corolla. Pod oblong, glabrous, slightly wrinkled, 
enclosed in the calyx-tube. 
Prairies. May-June. Oklahoma and Comanche counties. 
VII. AMORPHA L. 
Shrubs with glandular-punctate, odd-pinnate, many- 
foliolate leaves. Flowers in terminal, more or less elon¬ 
gated spikes. Calyx teeth 5, about equal. Petals 1. Sta¬ 
mens monodelphous. Pods small, 1-seeded. 
1. Amorpha fruticosa L. False Indigo or River-locust. A 
shrub with pubescent or glabrous foliage. Leaflets 11-21, distant, 
oval or elliptic, entire. Spike-like racemes dense, clustered or soli- 
