Spring Flora of Oklahoma 
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Key to the Genera. 
Stamens distinct. 
Leaves palmately trifoliate; pod inflated. 
II. Baptisia. 
Leaves odd-pinnate. I. Sophora. 
Stamens monodelphous or diadelphous. 
Anthers all alike; stamens monodelphous; leaves 
odd-pinnate. 
Pod 4-angled. VIII. Indigofera. 
Pod flat. IX. Cracca. 
Anthers all alike; stamens diadelphous (9 and 1); 
leaves usually pinnately compound, rarely pal¬ 
mate. 
Leaves with an even number of leaflets termim 
ated by a tendril. XV. Vicia. 
Leaves odd-pinnate, rarely palmate, without ten¬ 
drils. 
Foliage glandular-punctate. 
Pods covered with hooked prickles. 
XIV. Glycyrrhiza. 
Pods not prickly. 
Leaves palmately 3 or 5-foliate or pinnate¬ 
ly 3-foliate. VI. Psoralea. 
Leaves mostly pinnately 5-many-foliate, pet¬ 
als 1. VII. Amorpha. 
Foliage not glandular punctate. 
Leaves 3-foliate. 
Pods curved or coiled; flowers racemose. 
III. Medicago. 
Pods straight; flowers racemose or capitate. 
