LEGUMINOS.E. (PULSE FAMILY.) 11 



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15. D. paniculatum, DC. Stem slender, mostly smooth, with loug 

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

 tuse, smooth or slightly pubescent ; legume 3 - 5-joiuted, the joints triangular. 



Shady woods. August. Stem 2 -4 high. Leaflets rather rigid. 



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

 or obliquely obovate : flowers small. 



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

 cent above; 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. D. Strictum, DC. Stem erect, mostly simple, straight and slender, 

 smooth or roughish; 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. Piue barrens. 

 July -Sept. Stem 2 -4 high. Leaflets T-2'loug. 



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

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

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

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

 legume 2 - 3, hispid. Dry open woods, Tennessee, and 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-joiuted. (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-hairy, 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. Steins 2 -3 high. Leaflets 1' - 3' 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 piue barrens in the 

 lower districts. August. Stem l-2long. Leaflets seldom more than 1' 

 long. Racemes 1- 2 long. 



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

 leaves 1 - 3-f oliolate ; leaflets lanceolate-ovate, acute or obtuse, 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 high, the panicle 2 - 3. Leaflet* 

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



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