ORDER 46. LEGUMINO&/E. 321 



| BHYNCIIOSIA. proper. Calyx segments subulate, the lower much the longest, shorter 



than the corolla. Fls. in slender racemes ......................................... No. 1 



AKCYPHYLLUM, Ell. Calyx persistent, leafy, segments nearly equal, as long as the 



corolla. Lvs. coriaceous, rugose. Fls. fascicled or racemed ..................... Nos. 2 1 



PITCHEKIA, Nutt, Calyx segments lance-subulate, the upper rather the longer, shorter 



than the corolla. Fls. axillary, subsolitary ........................................ No. 5 



1 R. minima DC. Scrambling, puberulent; Ills, membranous, rhomboidal, acute 

 with a large angle; rac. much longer than the Ivs., about 12-flowered; fls. small, 

 remote, reflexed. Along rivers, S. Car. to Fla. and La. A delicate vine, several 

 feet in length. Lfts. not rugose, 6 to 9" square, petiole hardly 1' long. Rac. 

 axillary, about 6' long. Pods ^' long, mucronate. 



2 R. volubilis. Twining, pubescent ; Ivs. 3-foliate, Ifts. broadly oval or orbicu- 

 lar. somewhat rhomboidal, obtuse or acute; rac. few (3 to 10)-flowered, peduncu- 

 late; cal. segm. ovate-lanceolate, cuspidate. Dry woods, Ga. (Miss Keen), to 

 La, (Hale). Sts. 2 to 4f long, square, especially downy on the angles. Lower 

 Ivs. sometimes ? monophyllus ; Ifts. smaller than in No. 3. Sep. becoming quite 

 large in fruit. (R. diftbrmis DC. and R. latifolia Nutt.) 



3 R. simplicifolia. Dwarfish, pubescent, erect ; Ivs. reduced to a single leaflet 

 orbicular or renifortn, obtuse. Dry sandy woods, S. Car. to Fla. and La. St 

 angular, 1 to 3' high. Lvs. 1 to 2' broad, very veiny and rugous. Fls. small, 

 in one or more dense tufts. Pods ovate-oblong, 7'' in length. Apr., May. (R. 

 tomentosa, a. T. & G.) 



4 R. erecta DC. Tall, erect, velvety-pubescent; Ivs. 3-foliate, Ifts. elliptic or 

 oval, acute, terminal one sometimes roundish ; fls. fascicled or racemed, axillary 

 and terminal; cal. segm. parted almost to the base, lance-ovate to lance-linear. 

 Dry soils, Md. to Fla. Sts. about 6-angled, 2 5f high. The lowest leaf or Ivs. 

 sometimes monophyllous. Lfts. about as large as in No. 3. Rac. 1 to 3' long. 

 (3 to 7' Ell. in Glycine mollissima.) The leaflets are sometimes strikingly varie- 

 gated with lines of black dots along the veins above. (R. tomentosa, var. Tor. & 

 Gr. G. tomentosa, var. MX. 



5 R. galactoides. Erect, rigid, with many simple, angular, pubescent branches ; 

 Ivs. trifoliate, Ifts. (small) coriaceous, elliptic or oval, margins reflexed, under sur- 

 face with numerous resinous atoms; pedicels about equaling the petioles, half as 

 long as the fls. Ala. and W. Fla. Sts. 2 to 3f high. Lfts. 6 to 9" by 3 to 6", 

 those of the virgate branches much smaller. Fls. yellow. 



48. PHASE^OLUS, L. KIDNEY BEAN. (Lnt. phase! us, a little boat ; 

 from the form of the pods.) Calyx subbilabiate, upper lip 2-toothed, 

 lower 3-toothed ; keel with the stamens and style spirally twisted ; 

 legume compressed and falcate, or cylindric, many-seeded ; seeds com- 

 pressed, reniform. Herbaceous, twining or trailing. Lvs. pinnately 

 trifoliate ; Ifts. stipellatc. 



Native species Fls. raceineiL Pods falcate ............ . ............................ No. 1 



Fls. 1 or few in ahead. Pods straight .......................... Nus. 2 1 



Exotic. Steins climbing ........................................................ Nos. 5 7 



Stems erect, bushy ........................................................ No. 8 



1 P. pereiinis Walt. "\VILD BEAN VINE. Twining, pubescent; rac. paniculate, 

 mostly in pairs, axillary ; Ifts. ovate, acuminate, 3-veined ; leg. pendulous, fal- 

 cate. broad-mucronate. If A slender, twining vine, in dry woods, Can. and U. 

 S., common. St 4 to 7 f long, somewhat branching. Lfts. 1^ to 3^' long, 

 to equal width ; terminal one often subcordate, lateral ones unequally enlarged 

 at base outside, under surface scabrous. Rac. 1 to 3 together, 6 to 12' long, 

 loose, often unfruitful. Cor. purple and violet. Leg. about 2' long, ^' wide, with 

 compressed, reniform, dark purple seeds. Jl., Aug. 



2 P. diversifolius Pers. St. prostrate, diffuse, scabrous with recurved hairs ; 



angular, 2 to 3-!obed or entire; ped. longer than the leaf! few-flowered, 



long. Cor. purplish. Leg. becomes black when ripe, 5 to 7-seeded. Aug. Oct. 

 21 



