9. BB. Shrubs or small trees D. Flowers heads globular or cylindrical E. Stamens 10" each flower...........Leucaena L. glauca (L.) Benth. EE. Stamens more than 10" in each flower Acacia Acacia farnesiana (L.) Willd. DD. Flower heads globular or nearly so. F. Flowers inconspicuous; stamen 2x long as petals (white).........Desmanthus virgatus (L.) Willd. AA. Leaves twice divided, pods not opening when ripe B. Trees and shrubs; pods less than 1' long, thick... C. Flowers in cylindrical spikes, young branches thorny Prosopis P. chilensis (Mol.) Stuntz II. Unarmed shrubs or small trees; leaves once divided, leaflets 6 plus, flowers, conspicuous with 5 yellow, white or pink petals...Cassia Leaflets 8-10, 1.5-3.5" long.......C. occidentalis L. Leaflets 16-32, flowers orange yellow...C. glauca Lam. III. Herb, leaves compound Pods develope 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. Leaves entire, herbaceous shrubs, pods swollen.....Crotalaria