Phaseolus. XLVII. LEGUMINOS^. 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.) t 



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. — ® Lvs. abruptly pinnate, of many 

 leaflets and a terminal tendril. 



E. niRsuTCM. Hairy or Creeping Vetch. 



Lf/s. linear, truncate, mucronate; sfip. semi-sagittate, narrow; ped. 

 3 — C-flowercd, 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 

 8 — 20, 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 pi», Lat. pisum, Eng. pea, Fr. yoM. 



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 zvit/i, branching tendrils. 



P. SATIVUM. Common Garden Pea. — Lfts. ovate, entire, usually 4; sttp. 

 ovate, serai-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. X 



5. PHASEOLUS. 



Lat. phasclus, 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, twilling or trailing. Lvs. pinnately trifoliate: Lfts. stipellate. 



1. P. DIVERSIFOLIUS. PCrS. 



Sf. prostrate, difluse, scabrous with recurved hairs; //?.•;. angular, 2 — 3- 

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

 longer than the tube ; kg. 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, | 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. iiELvoLus. (and P. vexillatus. Limi.) 



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

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

 dric, 8— 10-seeded.— 'i; Sandy fields, N. Y. to Flor. and La. Stem 3— 5f long. 

 Leaflets 1—2' 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; lfts. 

 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 IJ — 3j' long, } — equal width; terminal 



