Acacia farnesiana (L.) Willd. DD. Flr. heads globular or nearly so F. Flrs. inconspicuous; stamen 2x long as petals (white) .... Desmanthus virgatus (L.) Willd. AA. Lvs. twice divided, pods not opening when ripe B. Trees and shrubs; pods less than one ft. in length, thick... C. Flrs. in cylindrical spikes, young branched thorny Prosopis P. chilensis (Mol.) Stuntz II. Unarmed shrubs or small trees; lvs. once divided, leaflets 6 plus; flrs. conspicuous with 5 yellow, white or pink petals.... Cassia Leaflets 8-10, 1.5-3.5 in. long ... C. occidentalis L. Leaflets 16-32, flr. orange yellow ... C. glauca Lam. III: Herb, lvs. compound Pods develop above the ground A. Pods with several joints, flat, leaflets 3 (1-5) ... Desmodium D. uncinatum (Jacq.) DC. D. triflorum (L.) DC. AA. Pods not breaking into joints B. Lvs. entire, herbaceous shrubs, pods swollen ... Crotalaria C. incana L. C. mucronata Desv. BB. Lvs. compound C. Leaflets two or more, pinnate ...... Sesbania S. tomentosa H.& A. CC. Leaflets 3 End leaflet stalked Leaflets toothed; pods not opening, very small, herb Pod straight, kidney shaped to spiral Medicago Medicago lupulana L. Leaflets not toothed, pods opening Petals unequal Prickly shrubs; flrs. red; small tree Erythrina indica Lamarck Petals nearly equal Pods broad flattened; leaflets broad; calyx with two upper lobes joined or two parted, the two lower lobes very small; herb Cenavalia Cnavalia microcarpa (DC.) Piper 22. Lythraceae Perphisa acidula Forst. [illegible] shrub with white solitary flrs., brown fruiting