LEGUMINOS.E. 51 



13. Petaloste'nion. Leaves odd-pinnate, crowded, glandular-dotted. 



Flowers small, in dense terminal heads or spikes. Corolla hardly 

 papilionaceous. Stamens only 5. Petals on thread-like claws, 4 

 of them on the tube of filaments, the fifth on the bottom of the 

 calyx. Pod 1-2-seeded. N. W. only. 



t- -*- Climbing by tendrils at the ends oftlie leaves. 



14. Vicia. Leaves abruptly pinnate, the leaf static prolonged into a ten- 



dril. Flowers axillary. Style filiform, hairy at the apex. Pod 

 2-several-seeded. Stamens diadelphous. 



15. Lath yrus. Leaves as in Vicia. Style flatfish, flattened above, 



and hairy down the side opposite the free stamen. Stamens 

 diadelphous. 



-i- -i- -i- Twining herbs. 



16. A'pios. A twining herb, leaves pinnate, of 5-7 leaflets. Keel of the 



flower slender and coiled inward. Flowers brown-purple, in 

 dense racemes. Stamens diadelphous. 



17. Stropliosty'les. A twining herb. Leaves pinnate, of 3 leaflets. 



Keel long, strongly incurved. Standard recurved-spreading. 

 Style bearded along the upper side. Pod terete. Seeds oblong, 

 pubescent. Stamens diadelphous. 



18. AmphicarpaVa. A low and slender twiner, the stem clothed with 



brownish hairs. Leaves pinnate, of 3 leaflets. Flowers polygam- 

 ous, those of the upper racemes perfect, those near the base fertile, 

 with the corolla inconspicuous or none. Stamens diadelphous. 

 -- -f- -i- -- Pods transversely jointed, the joints reticulated. 



19. Desmo'diiim. Leaves pinnate, of 3 leaflets. Calyx 2-lipped. 



Flowers purple or purplish, in axillary or terminal racemes. 

 Pod flat, the loioer margin deeply lobed, thus making the pod 

 jointed, roughened with hooked hairs, causing the pods to adhere 

 to the clothing, etc. Stamens diadelphous. 



20. Hcdys'nmm. Leaves pinnate, of numerous leaflets. Calyx 5-cleft. 



Pod flat, several-jointed, the joints roundish, reticulated, not 

 rough. .Flowers purple, deflexed, in racemes. Stamens dia- 

 delphous. 



21. Lespede'za. Leaves pinnate, of 3 leaflets. Calyx 5-cleft. Pod flat, 



oval or roundish, occasionally 2-jointed. but only 1-seeded. Flowers 

 sometimes polygamous. Stamens diadelphous. 



* * Flowers papilionaceous. Stamens all separate. 



22. Baptls'ia* Leaves palmate, of 3 leaflets. Flowers yellow. Stamens 



all separate. The Iceel-petals nearly separate. Racemes termin- 

 ating the bushy branches. Pods inflated. 



23. Thermop'si.s. Leaves palmate, of 3 leaflets, and with broad leaf- 



like stipules. Stamens all separate. Flowers yellow. Pod flat, 

 linear, curved, N-W. only. 



