LEGUMINOS^. 51 



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

 Flowers small, in dense terminal heads or spikes. Corollahardly 

 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. 



->- ■*- Climbing by tendHla at the ends of the leaves. 



1-1. Yicla. Leaves abruptly pinnate, tlie leaf stalk prolonged into a ten- 

 dril. Flowers axillary. Style Jili form, hairy at the apex. Pod 

 2-several-seeded. Stamens diadelphous. 



15. I^ath'ynis. Leaves as in Vicia. Style flattish^ flattened above, 



and hairy down the side opposite the free stamen. Stamens 

 diadelphous. 



-*--*--*- 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. StropUosty'le.s. A twiniiig herb. Leaves pinnate, of 3 leaflets. 



Keel long, strongly incurved. Standard recurved-spreadlng:. 

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

 pubescent. Stamens diadelphous. 



18. Aiiiphicarpee'n. Aloio 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. 

 -*--•--•--«- Pods transversely Jointedy the joints reticulated. 



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



Flowers purple or purplish, in axillary or terminal racemes. 

 Pod flat, tJie lower margin deeply lobed^ thus making the pod 

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

 to the clothing, etc. Stamens diadelphous. 



20. Hedys'arum. Leaves pinnate, of numerous leaflets. Calyx 5-cleft. 



Pod flat, several-jointed, the joints roundi^h^ reticulated, not 

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

 delphous. 



21. Iiespede'za. Leavespinnatcof 3 leaflets. Calyx 5-cleft. Pod flat, 



oval or roundish, occasionally B-jointed. but only l-seeded. Flowers 

 sometimes polygamous. Stamens diadelphous. 



* * Flowers papilionaceous. Stamens all separate. 



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



all sejyarate. The keel-petals nearly separate. Racemes termin- 

 ating the bushy branches. Pods inflated. 



23. Tbenuop'sis. Leaves palmate, of 3 leaflets, and with broad leaf- 



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

 linear, curved. — N.W. only. 



