LEGUMINOSAE 535 



According to Greshoff the leaves and also the seeds of Cassia marylandica 

 contain saponin; leaves of Prosopis juliflora, Galega officinalis, Psoralea mac- 

 rostachya as well as the seeds contain saponin. P. tenuiflora is regarded as 

 poisonous and is avoided by cattle. 

 Corolla not papilionaceous or only slightly so, endosperm copious. - 



Flowers perfect ; leaves abruptly pinnate 1 Cassia. 



Flowers polygamous or dioecious 2. Gymnocladus. 



Corolla papilionaceous without or with endosperm ; stamens usually 10, usually 

 diadelphous or monadelphous. 

 Stamens 10, distinct. 



Leaves palmately 3-foliolate. 



Pod inflated 4. Baptisia. 



Pod flat 3. Thermopsis. 



Leaves pinnate 5. Sophora. 



Stamens monadelphous, diadelphous, or rarely distinct. 

 Anthers of 2 forms, stamens monadelphous. 

 Leaves simple. 



Pod inflated 6. Crotalaria. 



Pod flat. 



Leaves 1-3-foliolate 8. Cytisus. 



Leaves usually 7-11 f oliolate 7. Lupinus. 



Anthers all alike. 



Leaves generally 3-foliolate. 



Flowers in racemes ; pods coriaceous 9. Melilotus. 



Flowers in heads ; pods membranous 10. Trifolium. 



Flowers in spikes or heads ; pods curved 10. Medicago. 



Leaves pinnately foliolate. 



Leaves not tendril bearing; plants not climbing. 



Herbs with glandular dots 12. Psoralea. 



Herbs without glandular dots; pods flat. 

 Leaves odd pinnate. 



Herbs. Flowers large 13. Tephrosia. 



Trees or shrubs 12. Robinia. 



Leaves evenly pinnate 15. Sesbania. 



Pod turgid inflated. 



Leaflets not toothed, or only at the apex. 



Keel tipped with an erect point 17. Oxytropis. 



Keel not tipped with an erect point 16. Astragalus. 



Leaflets toothed all round 20. Cicer. 



Herbaceous plants ; leaves with tendrils or climbing. 



Leaves with tendrils; style bearded at the apex 18. Vicia. 



Style bearded down one side 19. Lathyrus. 



Herbaceous climbers ; not tendril bearing 21. Phaseolus. 



1. Cassia L. 



Herbs, shrubs, or in tropical regions, trees, with abruptly pinnate leaves; 

 calyx of 5 sepals united at the base; petals 5; somewhat unequal, spreading, 

 imbricated, and clawed; stamens usually 10, or 5, often unequal, and some im- 

 perfect; anthers all alike, or the lower larger, opening by 2 pores at the apex; 



