LEGUMINOS^E. 



2I 9 



M. LUPULINA (None-such). Stem procumbent, angular ; leaves trifoli- 

 ate ; leaflets obovate ; stipules lanceolate, acute ; flowers small, yellow, in 

 small ovate heads, on slender, pubescent peduncles, longer than the petioles ; 

 legumes reniform, i-seeded. In fields and roadsides. May-October. 



12. Desmodium. Calyx with 2 bracteoles at base, bilabiate, 5- 

 cleft. Corolla inserted on the calyx at the base. Banner roundish.- 

 Keel obtuse. Style filiform. Stigma capitate. Legume compressed, 

 of several, i-seeded, separate joints. Leaves pirmately trifoliate. 2f 



1. D. NUDIFLORUM (Scape Trefoil}. Stem erect, leafy at summit ; leaf- 

 lets ovate ; flowers small, in racemes, purple ; stamens monadelphous ; 

 legume with obtusely triangular joints. July-August. 



2. D. ROTUNDIFOLIUM (Creeping Trefoil}. Stem prostrate, hairy ; 

 petioles hairy ; leaflets orbicular, hairy ; terminal one largest ; stipules large, 

 reflexed ; racemes with long peduncles ; flowers light purple ; legumes with 

 3-5 rhomboidal hispid joints. August. 



13. Lespedeza. Calyx 5-cleft, with 2 bracteoles at base. Keel- 

 petals very obtuse, on slender claws. Legume lenticular, small, reticu- 

 lated, unarmed, indehiscent, i-seeded. %. 



1. L. CAPITATA (Headed Bush Clover). Stem erect, villous ; leaves 

 crowded ; leaflets elliptical, silky beneath ; flowers in axillary racemes ; corolla 

 white. Dry fields and hills, 2-3 feet high. August-September. 



2. L. VIOLACEA (Bush Clover). Stem erect or diffuse, branching, pu- 

 bescent, leaves on short petioles ; leaflets hairy beneath ; flowers in axillary, 

 few-flowered racemes, slender ones violet-purple ; apetalous flowers glomer- 

 ate and subsessile in the axils of the leaves ; legumes much longer than the 

 calyx. August-September. 



14. Baptisia. Calyx 4-5 toothed ; standard reflexed. Stamens 10, 

 distinct. Leaves 3-foliolate. y. 



B. TINCTORIA (Indigo Weed}. Stem erect, smooth, branching; leaves 

 palmately trifoliate, on short petioles ; leaflets roundish ; flowers rather 

 small, yellow, in few-flowered racemes, terminating the branches. In dry 

 fields and woods, 2-4 feet high. July-September. 



15. Cassia. Sepals 5, slightly united at base, nearly equal. Petals 

 5, unequal. Stamens 10, distinct. Legume many-seeded, ij. 



C. MARILANDICA ( Wild Senna}. Glabrous ; stem erect ; leaves I2-I& 

 foliate ; leaflets oblong-lanceolate ; flowers bright yellow, numerous, in axil- 

 lary racemes and terminal panicles ; legumes linear ; anthers blackish. In 

 alluvial soils, 4-6 feet high. July-August. 



16. Gleditschia. Polygamous. Sepals 3-5, equal, united at base. 

 Petals 3-5, distinct, opposite the sepals. Stamens 3-5. Styles short. 

 Stigma pubescent. Legume compressed, often interrupted between the 

 seeds by sweet pulp. 



