PAPILIONACEAE. 199 



16. AESCHYNOMENE L. 



1. AESCHYNOMENE ViRGiNiCA (L.) B. S. P. Sensitive Joint Vetch. M.. p. 

 558. Along rivers. Summer. 

 Delaware— Tinicnm, Dr. Geo. Smith (Fu.). 



Camden — Kaighn 's Point (C). Gloucester — Center Square (Cr.), 

 Bridgeport (Fu.), Oldman Creek near the Delaware, near Mickleton (He.), 

 near Swedesboro (Li.). Salem — Banks of Delaware (C). 



New Castle — Brandywine Creek near Shelpot ; river shore at and below 

 Delaware City (Ta.), near Claymont (S. Tr.). 



17. STYLOSANTHES Sw. 



1. Stylosanthes biflora (L.) B. S. P. Pe7icil-ftower. M. p. 558. Dry 

 soil. Summer. 



18. MEIBOMIA Heist. Tick-trefoil. 



Loment not constricted above, deeply constricted below, long-stalked ; leaf- 

 lets broad. 

 Panicle arising from the base of the plant ; peduncle usually leafless. 



1. M. 7mdi flora. 

 Panicle terminal; leaves crowded at the base. 2. M. grandiflora. 



Loment constricted on both margins, more deeply below than above. 

 Stems trailing or reclining. 



Leaflets orbicular or nearly so. .3. M. Michauxii. 



Leaflets ovate or oval. 4. M. glabella. 



Stems erect or ascending. 



Leaves sessile or nearly sO; leaflets linear or lanceolate. 



5. M. sessilifolia. 

 Leaves petioled. 



Leaflets narrowly linear; joints of the loment usually concave 



on the back. 6. M. stricta. 



Leaflets broml. 



Joints of the loment notably longer than broad. 



Leaflets obtuse, rough-pubescent, yellowish-green. 



7. .1/. cnnescens. 

 Leaflets long-acuminate, glabrous, glaucous beneath. 



8. M. bra.cteosa. 

 Joints of the loment little longer than broad. 



Loment distinctly long-stalked in the calyx. 

 Plants glabrous or nearly so. 



Leaflets lanceolate or oblong. 



9. M. paniculata. 

 Leaflets broadly ovate or oval, glaucous be- 

 neath. 10. M. laevigata. 



Plants pubescent or scabrous. 



Leaflets thick, coriaceous, velvety-pubescent 



beneath. 11. M. viridiflora. 



Leaflets scarcely coriaceous, appressed-pubes- 



eent or villous beneath. 



12. M. Dillenii. 

 Loment sessile in the calyx or nearly so. 



Loment -joints 4-7; flowers numerous, showy. 



13. M. Canadensis. 

 Leaflets scabrous, 2-5 cm. long. 



14. M. rigida. 

 Leaflets not scabrous, 1-2 cm. long. 



Plant nearly glabrous throughout. 



15. M. Morylandica. 

 Stem pubescent ; leaflets and petioles ciliate. 



16. M. obtusa. 



