104 LEGUMINOS^. (I'L'LSE FAMILY.) 



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

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

 er than the petiole; panicle rough; legume mostly 2 jointed. — (H. obtusum, 

 Ell.) — Dry open woods, Florida and northward. August. — Stem 2° - 3° high. 

 Leaflets rarely more than 1 ' long, sometimes oblong. 



18. D. ciliare, DC. Very much like No. 17, but the stem and leaves 

 rough-haii'v, and the (sometimes acute) leaflets longer than the short petiole. — 

 With the preceding. 



19. 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-jointed. — Dry 

 woods, Florida to North Carolina, and northward. August. — Stems 2" - 3° 

 high. Leaflets 1' -3' long. Joints of the legume largest of this section. 



20. D. liueatum, DC. Stem prostrate, slender, smooth ; leaflets oval or 

 roundisli, smooth ; racemes elongated, axillary and terminal, simple or panicu- 

 late, rough ; legume 2 -3-jointed. — Open grassy pine barrens, Florida to North 

 Carolina, and westward. August. — Stem l°-2° long. Leaflets seldom more 

 than 1' long. Kacemes 1 ° - 2° long. 



26. RHYNCHOSIA, DC. 



Calyx 2-lipped, with the upper lip 2-cleft and the lower 3-parted, or nearly 

 equally 4-paited. Stamens diadelphous (9 &1). Style smooth, subulate. Leg- 

 ume oblong or scymitar-shaped, mostly 1 -2-seeded. Seeds earunculate. — Erect 

 or twining herbs or shrubs, with 1 or 3-foliolate, mostly softly-pubeseent and resi- 

 nous-dotted leaves, and axillary yellow flowers. 



* Stems twinint/, or low and erect : flowers in axillary racemes. 



I- Cali/x somewhat 2-lipped, 4-deJi ; the teeth subulate, sJiorter than the corolla, the 



lowest one longest : stems twining. 



1. R. minima, DC. Tomentose ; leaflets small, roundish or broadly 

 rhombic, barely acute, dotted beneath ; stipules subulate ; racemes filiform, much 

 longer than the leaves, loosely 6 - 12-flowered ; flowers minute, reflexed ; legume 

 scymitar-shaped. (Glycine reflexa. Ell.) —Damp soil along the coast, Key 

 "West to South Carolina, and westward. July. — Leaflets J' -I' long. 



2. R. parvifolia, DC. Velvety throughout ; leaflets ovate, oblong, or 

 obovatc-oblong, obtuse, or the upper ones acute, hoary and strongly reticulate 

 beneath, longer than the petiole ; stipules small, lanceolate ; racemes equalling 

 or longer than the leaves, slender, loosely 3 - 5-flowered ; lowest tooth of the 

 calyx nearly twice the length of the others ; legume oblong, obtuse, clothed with 

 soft down and longer hairs intermixed, 2-3-seeded. — South Florida. — Stem 

 l°-2° long. Leaflets 1' long. 



3. R. Caribsea, DC. Velvety throughout ; stem prostrate or twining ; 

 leaflets thin, ovate, acute or slightly acuminate ; stipules ovate ; racemes slender, 

 shorter than the leaves, loosely 3 - .'i-flowered ; teeth of the calyx short, nearly 



