194 FLOE A OF PHILADELPHIA. 



3. Cassia Tora L. M. p. 529. Introduced. Summer. 



Delaware— Banks of Darby Creek, Burmont (Mac). 



4. Cassia Marylandica L. Wild Senna. M. p. 530. Alluvial and sandy 



soil. Summer. 



5. Cassia occidentalis L. M. p. 530. Introduced. Summer. 



Delaware— 'Ba.riks of Darby Creek, Burmont (Mac). 



3. GLEDITSIA L. 

 1. Gleditsia triacanthos L. Honey Locust. M. p. 531. In cultivation 

 and escaped. Early summer. 



4. GYMNOCLADUS Lam. 

 1. Gymnocladus dioica (L.) Koch. Kentuclcy Cofee-tree. M. p. 531. In 

 cultivation. Spring. 



Family 17. PAPILIONACEAE L. Pea Family. 



The 10 stamens distinct. 



Leaves pinnate. Tribe 1. Sophoreae. 



Leaves digitate or simple. Tribe 2. Podalyrieae. 



The stamens monadelphous or diadelphous. 



Herbs, shrubs, woody vines or trees, the leaves not tendril-bearing. 

 Pod not a loment. 2-valved and indehiscent. 

 Foliage not glandular-dotted. 



Stamens monadelphous; anthers of 2 kinds. 



Tribe 3. Genisteae. 

 Stamens diadelphous, anthers all alike. 

 Leaves 3-foliolate, rarely 1-foliolate. 



Leaflets denticulate. Tribe 4. Trifolieae. 



Leaflets entire. Tribe 5. Loteae. 



Leaves pmnately several-many-foliolate, rarely 1-foli- 

 olate. Tribe 7. Galegeae. 

 Foliage glandular-dotted; pod indehiscent; 1-2-seeded herbs. 



Tribe 6. Psoraleae. 

 Pod a loment; herbs. Tribe 8. Hedysareae. 



Herbaceous vines, or herbs; leaves evenly pinnate with tendrils. 



Tribe 9. Vicieae. 

 Vines, ours herbaceous, or erect herbs ; leaves odd-pinnate, mostly 3-folio- 

 late, without tendrils. Tribe 10. Phaseoleae. 



Tribe 1. SOPHOREAE. 1. Cladrastis. 



Tribe 2. PODALYRIEAE, 2. Baptisia. 



Tribe 3. GENISTEAE. 



Herbs, with simple or 5-11-foliolate leaves. 



Leaves simple, pod inflated. 3. Crotalaria. 



Leaves 5-11-foliolate; pod flattened. 4. Lupinus. 



Shrubs, with 1-3-foliolate leaves. 5. Cytisus. 



Tribe 4. TRIFOLIEAE. 



Flowers spiked or capitate ; pods curved or coiled. 6. Medicago. 



Flowers in long racemes ; pods coriaceous. 7. Melilotus. 



Flowers capitate or umbelled ; pods straight, membranous. 8. Trifolium, 



Tribe 5. LOTEAE. 9. LoUis. 



