PHASEOLUS. XLVII. LEGUMINOS^E. 221 



white, with a large black spot on each of the alae. Legume torulose. Seeds 

 very large, with the large hilum at one end. (See Fig. 19, 1, 2.) f 



3. ERVUM. 



Calyx deeply 5-cleft, the segments acute, linear, and nearly equal, 

 about the length of the corolla ; stigma capitate, smooth ; style fili- 

 form ; legume oblong, 2 4-seeded. (D Lvs. abruptly pinnate, of many 

 leaflets a?id a terminal tendril. 



E. HIRSUTUM. Hairy or Creeping Vetch. 



Lfls. linear, truncate, mucronate; stip. semi-sagittate, narrow; ped. 

 3 6-flowered, shorter than the leaves ; leg. hirsute, 2-seeded. A creeping weed 

 in cultivated fields, N. Y. to S. Car. Stem very slender, 1 3f long. Leaflets 

 820, 4 8" long, hardly 1" wide, broadest above. Peduncles axillary, 3 6- 

 flowered. Calyx segments rather shorter than the bluish-white corolla. Le- 

 gumes short, with roundish, compressed brown seeds. Jn. 1 



4. P I S U M. 



Celtic pis, Lat. pisum, Eng. pea, FT. pais. 



Calyx segments leafy, the upper 2 shortest ; vexillum large, re- 

 flexed ; stamens 10, diadelphous (9 and 1); style compressed, cari- 

 nate, villous on the upper side ; legume oblong, tumid, many-seeded ; 

 seeds globose, with an orbicular hilum. Herbaceous, climbing. Lvs. 

 abruptly pinnate, ending with branching tendrils. 



P. sATlvuM. Common Garden Pea. Lfts. ovate, entire, usually 4; stip. 

 ovate, semi-cordate at base, crenate ; ped. several-flowered. (I) One of the 

 most valuable of leguminous plants, smooth and glaucous. Stem 2 5f long, 

 nearly simple, climbing by tendrils. Leaflets 2 3' long, as wide, obtuse, 

 mucronate. Stipules rather larger than the leaflets. Flowers 2 or more, on ax- 

 illary peduncles, large, white. This plant has been cultivated from time im- 

 memorial, so that its native country is unknown. There are many varieties. 

 Jn. 



5. PHASEOLUS. 

 Lat. phaseltis, a little boat ; which the pods may be said to resemble. 



Calyx sub-bilabiate, upper lip 2-toothed, lower 3-toothed ; keel with 

 the stamens and style spirally twisted ; legume compressed and fal- 

 cate, or cylindric, many-seeded ; seeds compressed, reniform. Her- 

 baceous, twining or trailing. Lvs. pinnately trifoliate. Lfts. stipellate. 



1. P. DIVERSIPOLIUS. Pers. 



St. prostrate, diffuse, scabrous with recurved hairs ; Ifts. angular, 2 3- 

 lobed or entire ; ped. longer than the leaf, few-flowered ; lower tooth of the cal. 

 longer than the tube ; leg. pubescent, broadly linear, cylindric. A creeping 

 or climbing plant, 3 5f long, on sandy shores and prairies, Can. and U. S. 

 Leaflets 1 2' long, f as wide, with scattered hairs beneath, often variously 

 and very obtusely lobed. Peduncles 2 8-flowered, 3 6' long. Corolla pur- 

 plish. Legumes become black when ripe, 5 7-seeded. Aug. Oct. 



2. P. HELVOLUS. (and P. vexillatus. Linn.) 



St. slender, twining ; Ifts. between oblong-ovate and linear, entire ; ped. 

 slender, several times longer than the leaves, few-flowered; leg. straight, cylin- 

 dric, 8 10-seeded. 7J. Sandy fields, N. Y. to Flor. and La. Stem 3 5f long. 

 Leaflets 12' by i 1'. Peduncles 4- -8' long, 4 7-flowered. Calyx with 2 

 bracts at base. Corolla purplish, vexillum large, roundish. Legume 2 3' 

 long, very narrow, subfalcate. Aug. Sept. 



3. P. PERENNIS. Walt. Wild Bean Vine. 



Twining, pubescent; rac. paniculate, mostly in pairs, axillary; Ifts. 

 ovate, acuminate, 3-veined ; leg. pendulous, falcate, broad-mucronate. % A 

 slender, twining vine, in dry woods, Can. and U. S., common. Stem 4 7f 

 long, somewhat branching. Leaflets 1 3i' long, f equal width ; terminal 



