82 LEGUMINOS^E. 



erect. Leaf els narrow. Flowers small, purple, in long axillary and termina. 

 panicles. * Strict Desmodium. 



12. D. acuminatum D. C. : stem erect, simple, pubescent, leafy at the 

 summit ; leaves ternate, on very long petioles ; leafets ovate, conspicuously 

 acuminate, somewhat hairy, the terminal one broader and orbicular-ovate ; 

 panicle terminal, on a very long peduncle ; joints of the legume 2 3, semi- 

 oval, pubescent. Hedysarum acuminatum Mich. 



Shady woods. Can. to Car. W. to Miss. July, Aug. %. Stem about a foot 

 high, a little hairy. Leafets 2 4 inches long. Peduncle 1 2 feet long. Flow- 

 ers pale purple. Acuminate-leaved Desmodium. 



13. D. nudifl&rum D. C. : stem erect, simple, leafy at the summit ; leaves 

 ternate; leafets broad-ovate, acuminate ; scape paniculate, smooth, radical; 

 legume on a very long stipe, with 3 4 obtusely triangular joints. Hedy- 

 sarum nudiflorum Linn. 



Woods. Can. to Car. Aug. (J). Stem 8 10 inches high. Scape l 3 

 feet long, slender. Flowers purple. Naked-flowered Desmodium. 



14. D. pauciflorum D. C. : stem decumbent or suberect, low and slender, 

 mostly simple, pilose ; leaves alternate and distant, lateral, on rather long pe- 

 tioles ; leafets obliquely ovate, subacuminate and pubescent ciliate ; the ter- 

 minal one dilated, rhomboid-ovate ; stipules obsolete ; raceme slender, few- 

 flowered, on a terminal peduncle ; legume stipitate, with 2 3 semi-oval 

 pubescent joints. Hedysarum paucijlorum Null. 



Woods. Penn. ; rare. Darlington. W. to Ark. Aug. 1\.. Stem 6 9 inches 

 high, rather erect or decumbent at base. Leafets 1 3 inches long. Flowers in 

 a loose slender raceme, small, white or reddish-white. 



Few-Jlowered Desmodium. 



15. D. rotundifolium D. C. : stem prostrate, hirsute ; leaves ternate ; 

 leafets orbicular, hairy ; stipules broad-ovate, acuminate, reflexed ; racemes 

 axillary and terminal ; legume with 3 5 rhomboid-oval hispid joints. He- 

 dysarum rotundifolium Mich. 



Rocky woods. N. Y. to Car. Aug. %.. Stem 2 4 feet long, hirsute with 

 spreading hairs. Racemes few-flowered, pedunculate. Flowers purple. 



Round-leaved Desmodium. 



1 6. D. humifusum Beck : stem procumbent, smooth ; leaves ternate ; 

 leafets ovate, slightly hairy ; racemes terminal, elongated ; joints of the le- 

 gume subrhomboidal. Hedysarum humifusum Muhl. Dig. 



Woods. Mass. Penn. to Car. Muhl. Aug. 7J.. Resembles the last, but is 

 smoother, and has the leafets oval or ovate and subacute. Perhaps only a va- 

 riety. Procumbent Desmodium. 



17. HEDYSARUM. D. C Hedysarum. 

 (Etymology uncertain.) 



* Calyx 5-cleft ; segments linear-subulate, nearly equal. Stand- 

 ard large. Keel obliquely truncate ; wings much shorter than 

 the keel. Stamens diadelphous (9 and 1). Legume with many 

 joints ; joints compressed, roundish, 1 -seeded. 



H. boreale Nutt. : stem subdecumbent ; leaves pinnate ; leafets (7 or 8 

 pairs) oblong-ovate, partly villons ; stipules sheathing, subulate : racemes 



