LEGUMINOS^. (pulse FAMILY.) 101 



roundish, ciliate ; calyx villous ; petals white, obtuse ; style aud ovarv 

 bearded. — Dry piue barrens iu the middle and lower districts. — Sept. - Oct. 

 — Stem 2° high. 



Var. trif oliatus. Glandless, or nearly so ; leaflets mostly 3, filiform ; 

 bracts 3-4, broadly ovate, acute ; style bearded below the middle ; petals 

 acute. — With the preceding. 



§ 2. Lower bracts nut involucrate, nor empty: calyx teeth shorter than the tube: 

 spikes single, terminal. 



* Petals white or Jlesh-colored. 



2. P, gracilis, Nutt. Stems decumbent, virgate ; leaflets 5-7, oblong- 

 linear, obtuse ; spikes oval, becoming cylindrical in fruit, peduncled ; vexillum 

 obovate. — Low pine barrens, Florida, and westward. August. — Stems 2° 

 long. Leaflets ^ long. 



3. P. qarneus, Michx. Stems erect, much branched, very leafy ; leaf- 

 lets 5 - 7, linear, acute; spikes oblong, long-peduncled ; calyx as long as the 

 subulate bracts ; vexillum oblong. — Dry sandy soil, Florida aud Georgia, 

 westward. — Stems 2° -3° high. Flowers white or reddish. 



4. P. candidus, Michx. Stem rigidly erect; leaflets 5 - 9, lanceolate, 

 obtuse ; spikes cylindrical in fruit ; calyx sulcate, half as long as the setaceous- 

 pointed bracts, the teeth acute; vexillum "broadly cordate." — West Tennes- 

 see, and westward. August - Sept. 



5. P. multiflorus, Nutt. ? Glabrous ; stem corymbose-branched ; leaf- 

 lets 3-5, filiform ; lieads numerous, globose; calyx smooth, longer than the 

 subulate bracts, tlie short teeth obtuse ; legume partly exserted. — St. Peters- 

 burg, Florida (C L. Brownell). — Stem 2° high. Leaflets 3" -4" long. 

 Heads 3" wide. 



* * Petals purple or rose-color. 



6. P. violaCGUS, Michx. Stem erect, corymbose above, very leafy; 

 leaflets 3-5, narrow-linear ; spikes oblong or cylindrical ; calyx silky, the 

 short teeth obtuse, as long as the lanceolate acuminate silky bracts. — West 

 Tennessee, and westward. — Stem 2° high. Flowers violet-purple. 



7. P. roseus, Nutt. Leaflets narrower ; calyx smooth, the teeth as long 

 as the tube, shorter than the setaceous bracts ; petals obovate, rose-color ; 

 otherwise like the preceding. — Low pine barrens. East Florida. 



8. P. folioSUS, Gray. Smooth, very leafy ; leaflets 16-29, linear-oblong, 

 mucronate, the glands few aud small; spikes cylindrical, short-peduncled ; 

 bracts slender-awned from a lanceolate base, exceeding the rose purple flow- 

 ers; calyx glabrous, the teeth about half the length of the cylindraceous 

 tube {Gray). — Near Nashville, Tennessee. 



9. P. decumbens, Nutt. Stems decumbent, branching from the base ; 

 leaflets 6 or 8, linear-oblong, mucronate ; spikes ovate-oblong ; calyx shorter 

 than the acuminate bracts, the teeth longer than the smooth tube; petals 

 deep violet-purple, linear-oblong, obtuse at the base, vexillum cordate. — 

 Northern Alabama, Tennessee, and westward. — Stems 1° long. Leaflets 



6" - 8" long. 



