PHASE0LU9. LEGUMINOS^. 279 



Legume linear or falcate, more or less compressed, or somewhat terete, many- 

 seeded. Hilum small, oval-oblong, naked, or rarely with a small membran- 

 aceous caruncle. — Herbaceous or suCfrutescent, twining or trailing plants. 

 Leaflets manifestly stipellate. Pedicels usually in pairs. — Kidnf.y-Bean. 



§ 1. Slipnles not produced at the base: teeth of the cahj.r broad, mvrh 

 shorter than the tube: legume compressed, broad and Jalcate. — Dhk- 

 PANOSPRON, Benth. 



y^l. P. perennis (Walt.): perennial; leaflets ovate, acuminate, palmately 

 3-veined; racemes solitary or somewhat clustered, simple or a little branch- 

 ed, longer than the leaves; legumes pendulous. — ]l'alt. Car. p. 182; Pirrsh, 

 fi. 2. p. 469; Darliufft. ft. Cest. p. 429. P. perennis & macrostachyus, Ell.! 

 in jour. acad. Philad. 1. p. 384 ; DC. prodr. 2. p. 391. P. paniculatus, 

 Mich.T.! Jl. 2. p. 60. Dolichos polystachyos, Linn. ; U'iUd. .fp. 3. p. 1049. 

 Rocky woods and borders of swamps, Canada ! to Florida ! and west to 

 Louisiana ! July-Aug. — Stem 4-10 feet long, pubescent, climbing over 

 small shrubs or trailing on the ground. Leaflets 2-4 inches in h-ngth. and 

 often as broad as long ; the terminal one usually subcordate ; the lateral ones 

 inequilateral, pubescent beneath. Stipules small, lanceolate. Racemes 4- 

 12 inches long, slender, loosely flowered : pedicels 2-4 lines long, with 3 mi- 

 nute hairy bracts at the base. Calyx somewhat bilabiate ; teeth broad and very 

 short, the upper ones rounded. Corolla purple. Legume li-2j inches long 

 and 4-5 lines wide, somewhat tumid, strongly falcate. Seeds oblong-reni- 

 form, dark purple. — Elliott considered the Northern plant as distinct from the 

 Southern one ; but we find no constant difie-rence between them. 



2. P. sinuatus (Nuttl mss.): perennial, nearly glabrous, prostrate; leaf- 

 lets reticulated, 2-3-lobed; the lobes obtuse; peduncles longer than the 

 leaves, mostly solitary, simple; legumes pendulous. 



East Florida, Mr. Ware! (Nuttall) Tampa Bay, Dr. Burrows! — 

 Stem 4-6 feet long. Leaflets 1-1 i inch long, somewhat coriaceous, some- 

 times obtusely triangular, but usually almost equally 3-lobed. Stipules small, 

 lanceolate. Racemes 6-8 inches long ; the flowers rather distant and chief- 

 ly produced on the upper portion of the peduncle. Flowers and legume as 

 in the preceding species, from which it is at once distinguished by its lobed 

 and much smaller leaves; but it is possibly a mere variety of that plant. 



§ 2. Stipules adnate to the petiole, produced and free at the base : lower 

 tooth of the calyx- as long or longer than the tube: legume linear ^ 

 straight, somewhat terete. — Strophostyles, Elliott. 



'f' 3. P. diversifolius (Pers.) : annual; stem usually prostrate; diffiise, re- 

 trorsely and roughly hirsute; leaflets broadly ovate, angular or 2-3-lobed, 

 sometimes entire, about the length of the petioles; stipules lanceolate; pe- 

 duncles longer than the leaves ; flowers few, capitate ; lower tooth of the 

 calyx narrow, longer than the tube; legume slightly pubescent, broadly lin- 

 ear, nearly terete, 6-7-seeded ; seeds oblong-cylindrical, woolly. — Pers. syn. 

 2. p: 296 ; DC. prodr. 2. p. 394. P. trilobus. Michx. ! ft. 2. p. 60, not of 

 Roth ; Pursh. Jl. 2. p. 470 ; J5?Ve/. fl. Bo.-^t.' p. 268. P. angulosus. Ort. ; 

 DC. I.e.? Glycine angulosa, A/HTi/. in Willd. sp. 3. p. 1056. Stropho- 

 styles angulosa. Ell. sk. 2. p. 229. Dolichos ? angulosus, DC. I. c. p. 399, 

 excl. syn. Walt. 



Sandy shores, particularly near the sea, Canada ! to Florida ! west to 

 Louisiana ! Aug.-Oct. — Roots often bearing numerous small tubers. Stem 



