82 LEGUMINOS^. 



erect. Leafels narrow. Flowers small, purple, in long axillary and termintt. 

 panicles. • Stricl Desmodium. 



12. D. acuviinatum 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 acuviinatuvi 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. nudijlorum 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 nudijlorum Linn. 



Woods. Can. to Car. Aug. (!)• — Stem 8 — 10 inches high. Scape 1^ — 3 

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



14. D. paucijicrrum 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 Nutt. 



Woods. Penn. ; rare. DorZm^tow. W. to Ark. Aug. %. — Stem& — 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-flowered Desmodium. 



15. D. rolundifolium 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. %.—Slem 2 — 4 feet long, hirsute with 

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



Round-leaved Desmodium. 



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

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

 gume subrhomboidal. Hedysarum humifusum Muhl. Big. 



Woods. Mass. Perm, to Car. Muhl. Aug. %. — 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. horeale Nutt. : stem subdecumbent ; leaves pinnate ; leafets (7 or 8 

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



