114 LEGUMINOS^E. (PULSE FAMILY.) 



3. Legume sessile, nearly even on both sutures, the joints quadrangular. 

 24. D. triflorum, DC. Creeping, pubescent ; leaflets obcordate ; pe- 

 duucles axillary, single, or 2 -3 together, I-flowered; legume curved, 3-4- 

 joiuted. Manatee, South Florida. Introduced. Stem 6'- 12' long. 



25. RHYNCHOSIA, DC. 



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

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

 Legume oblong or scimitar-shaped, mostly 1-2-seeded. Seeds carunculate. 

 Erect or twining herbs or shrubs, with 1 or 3-foliolate, mostly softly-pubes- 

 cent and resinous-dotted leaves, and axillary yellow flowers. 



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



H- Calyx somewhat '2-lipped, 4-cleft ; the teeth subulate, shorter 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 ; 

 legumes scimitar-shaped. Dump soil along the coast, South Carolina, and 

 westward. July. Leaflets \' - Y long. 



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

 obovate-obloug, obtuse, or the upper ones acute, hoary, and strongly reticu- 

 late 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, ob- 

 tuse, 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 - 5-flowered ; teeth of the calyx 

 short, nearly equal ; legume scimitar shaped, acute. South Florida. 

 Stem 2 -3 long. Leaflets H'-2' long. Racemes l'-2' long. Flowers 

 small. Legume 1'- li' long, tapering at the base. 



H- *- Calyx 4-]>(trted, nearly as long as the corolla, the lobes linear or lanceolate, 

 nearly equal : stems twining or erect. 



4. R. menispermoidea, DC. Stems several from one root, prostrate 

 or twining, downy ; stipules ovate-lanceolate; leaflets solitary, renit'orin, to- 

 mentose ; peduncles rarely as long as the petiole, with few crowded flowers at 

 the summit; calyx deeply parted, the lanceolate acute or acuminate lobes 

 nearly equal ; legume oblong, acute, tornentose, 2-seeded. Charlotte Harbor, 

 South Florida (Blodgett). Stems 2 - 3 long. Leaflets 1' - 2' in diameter. 



5. R. tomentosa, Hook. & Am. Softly pubescent ; stem trailing or 

 climbing ; leaflets oval or orbicular, often acute, f- 1-J' long; stipules lanceo- 

 late ; racemes nearly sessile, cluster-like, few-flowered ; calyx as lonsr as tl.e 

 corolla, and half as long as the oval 2-seeded legume. Dry sandy soil in the 

 lower districts. June - August. Stem 2 -3 long Legume \' long. 



