LEGUMIXOS.E. (PULSE FAMILY.) 113 



?5. D. paniculatum, DC. Stem slender, mostly smooth, with long 

 and virgate branches ; leaflets varying from oblong to linear-lanceolate, ob- 

 tuse, smooth or slightly pubescent ; legume 3 - 5-jointed, tlie joints triangular. 



— Shady woods. August. — Stem 2° -4° high. Leaflets ratlier rigid. 



* * * Stipules subulate, deciduous : legume 2-3-jointed ; the joints small, oral, 

 or ohliquelj obovate : flowers small. 



16. D. tenuifolium, Torr. & Gray. Stem slender, erect, rough-pubes- 

 cent al)Ove ; leaflets linear, reticulated, obtuse, smooth above, keeled, much 

 longer than the short petiole; panicle leafless, very rough; flowers small; 

 legume sessile, mostly 2-jointed. — Dry pine barrens, Florida to North Caro- 

 lina. July - August. — Stem 2° - 3° high. Leaflets 2' - 3' long. 



17. I>. strictum, DC. Stem erect, mostly simple, straight and slender, 

 smooth or rougliish ; leaves on short petioles ; leaflets narrowly linear, rather 

 obtuse, coriaceous, reticulated, nearly smooth ; panicle virgate, few-flowered ; 

 the pedicels very slender ; legume stipitate, 1 - 3-joiuted. — Pine barrens. 

 July - Sept. — Stem 2° - AP high. Leaflets 1' - 2'loug. 



18. D. sessilifolium, Torr. & Gray. Stem 2° -3° high, brandling, 

 softly pubescent ; leaves nearly sessile ; leaflets 1'- 2' long, rather rigid, linear- 

 oblong, obtuse, scabrous above, tomentose beneath ; flowers crowded on the 

 long branches of the panicle, short-pedicelled ; joints of the nearly sessile 

 legume 2-3, hisj)id. — Dry open woods, Tennessee, aud northward. 



19. D. Marilandicum, Boott. Stem erect, smooth, mostly simple; 

 leaflets small, ovate or roundish, obtuse, smooth, pale beneath, commonly 

 shorter than the petiole; panicle rough; legume mostly 2-jointed. (H. ob- 

 tusum, Ell.) — Dry open woods. August. — Stem 2° -3° high. Leaflets 

 rarely more than 1' long, sometimes oblong. 



20. D. ciliare, DC. Very much like the last, but the stem and leaves 

 rough-hair}^, and the (sometimes acute) leaflets longer than the short petiole. 



— With the preceding. 



21. D. rigidum, DC. Stem erect, branched, rough-pubescent ; leaflets 

 (pale) oval or oblong, obtuse, rough above, hairy beneath, strongly reticulated 

 on both sides ; panicle ample, leafy below ; legume mostly 3-joiuted. — Dry 

 woods. August. — Stems 2° -3° high. Leaflets I'-S' long. 



22. D. lineatum, DC. Stem prostrate, slender, smooth ; leaflets oval 

 or roundish, smooth ; racemes elongated, axillary and terminal, simple or 

 paniculate, rough; legume 2-3-jointed. — Open grassy pine barrens in the 

 lower districts. August. — Stem l°-2°long. Leaflets seldom more than I' 

 long. Racemes ]°- 2° long. 



23. D. Floridanum, Chapm. Stem short, rigid, very rough; lower 

 leaves 1 -3-foliolate ; leaflets lanceolate-ovate, acute or olituse, very rough 

 above, pubescent and strongly reticulate beneath ; stipules subulate ; panicle 

 elongated, sparingly branched, leafless; legume 2-4-jointed, the stipe shorter 

 than the calyx; joints obliquely obovate. — Dry sandy soil near the coast. 

 Florida. July- August. — Proper stem 1° higli, the panicle 2°-3°. Leaflets 

 2' -3' long, the stipules and stipels rigid. Bracts and flowers small. 



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