LEGUMINOSAE (PULSE FAMILY) 501 



I. Stamens (10) distinct. 

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



9. Baptisia. Tod inflated. 



10. Thermopsis. Pod flat, linear. 



* * Leaves pinnate ; calyx-teeth short. 



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



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



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



distinct in no. 25. 



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

 -H Calyx 5-lobed ; pod inflated. 



13. Crotalaria. Herbs with simple leaves. 



i- -i- Calyx 2-lipped ; pod flat. 

 H- Shrubs with simple leaves. 



14. Genista. Seeds estrophiolate. Corolla yellow. 



H- -H- Shrubs with 1-3-foliate leaves. 



15. CytiSUS. Seeds strophiolate. Corolla yellow. 



H- +> -H- Shrubs ; leaves reduced to pungent petioles. 



16. Ulex. Seeds strophiolate. Corolla yellow. 



H- -H- -H- -H- Herbs ; leaves (in ours) 7-11-foliolate. 



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



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



+- Leaves digitateiy (rarely pinnately) 3-foliolate ; 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. 



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



twining nor climbing (except in no. 31). 



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



= Filaments all connate. 



21. Anthyllis. Leaves odd-pinnate (the basal sometimes 1-foliolate). Flowers loosely capitate. 



Pod subindehiscent, 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- -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-foliolate: 



25. Amorpha. Corolla of one petal ! 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. 



*+ +* -H- Herbage not glandular-dotted (except in no. 84) ; stamens mostly diadelphous ; pod 2- 

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

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

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



