LEGUMINOS^E. 83 



13. STYLOSANTHES. Swartz. 



Tube of the calyx very long, slender ; limb 5-parted, lobes 

 unequal. Carol inserted into the calyx. Keel minute, bifid 

 at the apex. Stamens monadelphous. Style filiform, very 

 long, straight. Stigma capitate, hispid. Legume with two 

 joints ; joints 1-seeded ; upper one subuncinate, acuminated 

 into the base of the style. Diadelphia. Decandria. 



S. elatlor Swartz. : stem erect, herbaceous, pubescent on one side ; 

 leaves ternate ; leafets lanceolate, smooth, acute ; bracts lanceolate, 

 ciliate ; spikes few-flowered ; legume indurated, 1-seeded. S. hispida 

 Mich. Arachis aprica Walt. 



HAS. Sandy woods. Penn. to Car. July, Aug. Z. Stem a 

 foot high, branched. Flowers yellow, in terminal compact heads. 



Pencil Flower. 



14. jESCHYNOMENE. Linn. 



Calyx 5-cleft, bilabiate; upper lip 2-cleft or 2-toothed ; 

 lower one 3-cleft, or 3-toothed. Corol papilionaceous. Sta- 

 mens 10, in two equal sets. Legume compressed, transverse- 

 ly jointed, erect, exsert ; joints 1-seeded. 



Diadelphia. Decandria. 



JE, hispida JVUld. : stem herbaceous, erect, and with the petioles 

 and peduncles hispid ; leaves in many pairs ; leafets linear, obtuse ; 

 racemes simples, 3 5-flowered, legumes distinctly stipitate, with 6 9 

 hispid joints. Hedysarum virginicum Linn. ? 



HAS. Marshes. Penn. to "Car. July, Aug. $. Stems 23 

 feet high. Leafets 20 25 pairs. Flowers yellow and red. 



15. DESMODIUM. De Cand. 



Calyx with 2 bracts at base, obscurely bilabiate to the mid- 

 dle ; upper lip bifid ; lower one 3-parted, Corol papiliona- 

 ceous. Standard roundish ; keel obtuse, not truncate ; wings 

 longer than the keel. Stamens diadelphous (9 and 1) ; fila- 

 ments subpersistent. Legume with many joints ; joints com- 

 pressed, 1-seeded, mernbranaceous or coriaceous ; scarcely 

 dehiscent. Diadelphia. Decandria. 



1. D. canadenseDe Cand. : leaves ternate ; leafets oblong-lanceolate, 

 somewhat glabrous ; stipules filiform ; racemes terminal ; legumes 

 jointed ; joints 4 5, oval, obtuse, triangular, hispid. Hedysarum can- 

 adense Linn. 



HAB. Dry woods. Can. to Car. W. to Miss. July. If. 

 Stem 3 or 4 feet high, erect. Leafets 3 inches long. Flowers 

 purple. Bush Trefoil. 



