LEGUMINOSAE (PULSE FAIMILY) 601 



I. Stamens (10) distinct. 



* Leaves palmately 3-foliolate or simple ; calyx 4-5-lobed ; herbs. 

 9. Baptisia. Pod Inflated. 



10. Thermopsis. Pod flat, liDear. 



* * Leaves pinnate ; calyx-teeth short. 



11. Cladrastis. Flowers panicled, white. Pod flat. A tree. 



12. Sophora. Flowers racemose, white. Pod terete, moniUform. Herbaceous. 



11. Stamens monadelphous, or diadelphous (9 and 1, rarely 5 and 5), nearly 



distinct in no. 26. 

 * Anthers of two forms ; stamens monadelphous ; leaves digitate, simple, or rarely phyllodial. 



-«- Calyx 5-lobed ; pod inflated. 

 18. Crotalaria. Herbs with simple leaves. 



+- -1- Calyx 2-lipped ; pod flat. 

 ++ Shrubs with simple leaves. 



14. Genista. Seeds estrophiolate. Corolla yellow. 



++ -M- Shrubs with 1-3-foliate leaves. 



15. Cytisus. Seeds strophiolate. Corolla yellow. 



++++++ Shrubs ; leaves reduced to pungent petioles, 



16. Ulex. Seeds strophiolate. Corolla yellow. 



■H- ++ ++ ++ Herbs ; leaves (in ours) T-11-foTiolate. 



17. Lupinus. Seeds estrophiolate. Corolla (in ours) blue, roseate, or rarely white. 



* * Anthers uniform (except in nos. 24 and 40). 

 ■t- Leaves dlgitately (rarely pinnately) 8-foHolate ; leaflets denticulate or serrulate; stamens diadel- 

 phous ; pods small, 1-few-seeded, often inclosed in the calyx or curved or coiled. 



18. Trifolium. Flowers capitate. Pods membranaceous, 1-6-seeded. Petals adherent to the 



stamen-tube. 



19. Melilotus. Flowers racemed. Pod coriaceous, wrinkled, 1-2-seeded. 



20. Medicago. Flowers racemed or spiked. Pods curved or coiled, 1-few-seeded. 



+- -1- Leaves unequally pinnate (or digitate in no. 24); leaflets entire; pod not jointed; neither 



twining nor climbing (except in no. 31). 



<-»• Herbage not resinous-dotted ; flowers umbellate, loosely capitate or solitary and axillary ; herbs. 



= Filaments all connate. 



21. Authyllis. Leaves odd-pinhate (the basal sometimes 1-foliolate). Flowers loosely capitate. 



Pod subindehiBcent, included in the calyx. 



= -= One filament free, the others connate. 



22. Hosackia. Leaflets (in ours) 1—3. Flowers (in ours) solitary on leafy-bracted peduncles. 



23. Lotus. Leaflets (in ours) 5, the lower pair simulating foliaceous stipules. Flowers (in 



ours) umbellate. 

 H- ++ Herbage glandular-dotted ; stamens mostly monadelphous ; pod small, indehiscent, mostly 

 1-seeded ; leaves pinnate (except in no. 24). 



24. Psoralea. Corolla truly papilionaceous. Stamens 10, half of the anthers often smaller or 



less perfect. Leaves mostly palmate, 8-5-folioiate. 



25. Amorpha. Corolla of one petal I Stamens 10, monadelphous at base. 



26. Dalea. Corolla Imperfectly papilionaceous. Stamens 9 or 10; the cleft tube of filaments 



bearing 4 of the petals about its middle. 



27. Petalostemum. Corolla scarcely at all papilionaceous. Stamens 5; the cleft tube of fila- 



ments bearing 4 of the petals on its summit. 

 *+ 4+ ++ Herbage not glandular-dotted (except In no. 84); "stamens mostly diadelphous; pod 2- 

 valved, several-seeded ; leaves pinnately severnl-foliolate ; flowers racemose. 

 -= Wings cohering with the keel ; pod flat or 4-angled ; hoary perennial herbs. 

 28 Tephrosia. Standard broad. Pod flat. Leaflets oinnately veined. 



