144 LEGUMINOS^E. (PULSE FAMILY.) 



obtuse (about 2' long) ; peduncles many-flowered ,- flowers 6 - 8" long. Shady 

 banks, Penn. to Ga., west to Kan. and Minn. 



4. L. pallistris, L. Slender, glabrous or somewhat pubescent.; stem 

 often winged ; stipules lanceolate, sharp-pointed at both ends ; leaflets 2-4 

 pairs, narrowly oblong to linear, acute (1 -2' long) ; peduncles 2 - 6-flowered ; 

 flowers 6" long. Moist places, N. Scotia to N. J., and westward across the 

 continent. (Eu.) 



Var. myrtif61ius, Gray. Stipules usually broader and larger ; leaflets 

 ovate to oblong (I' long or less). Same range, and extending south to N. C. 

 -i- - Flowers yellow ; leaflets a single pair. 



L. PRATENSIS, L. Low and straggling; leaflets narrowly lanceolate to 

 linear, acute ; peduncles several-flowered. Spontaneous in Mass., N. Y., and 

 Ont. (Nat. from Eu.) 



* * # Tendrils usually wanting ; low, mostly erect ; stipules semi-sagittate ; flow- 

 ers very large, purple ; pod stipitate in the calyx. 



5. L. polym6rphus, Nutt. Leaflets 3-6 pairs, narrowly oblong to 

 linear, thick and strongly nerved, 1-2' long; seeds with a narrow footstalk 

 and short hilum. Mo., Kan., and westward. 



6. L. orn&tus, Nutt. Like the last, but leaflets always narrow, 3-12" 

 long ; seeds with a very broad footstalk and long hilum. Kan. to Col. and 

 the Dakotas. Scarcely 1 high. 



32. A PI OS, Boerhaave. GROUND-NUT. WILD BEAN. 



Calyx somewhat 2-lipped, the 2 lateral teeth being nearly obsolete, the upper 

 very short, the lower one longest. Standard very broad, reflexed ; the long 

 scythe-shaped keel strongly incurved, at length coiled. Stamens diadelphous. 

 Pod straight or slightly curved, linear, elongated, thickish, many-seeded. A 

 perennial herb (with some milky juice!), twining and climbing over bushes, 

 and bearing edible tubers on underground shoots. Leaflets 3 - 7, ovate-lan- 

 ceolate, obscurely stipellate. Flowers in dense and short, often branching 

 racemes. (Name from &TTIOV, a pear, from the shape of the tubers.) 



1 . A. tub6r6sa, Moench. Flowers brown-purple or chocolate-color, violet- 

 scented. Low grounds, N. Brunswick to Fla., west to Minn., Kan., and La. 



33. PHASEOLUS, Tourn. KIDNEY BEAN. 



Calyx 5-toothed or 5-cleft, the two upper teeth often higher united. Keel of 

 the corolla, with the included stamens and style, spirally coiled. Stamens dia- 

 delphous. Style bearded along the upper side; stigma oblique or lateral. 

 Pod scythe-shaped, several - many-seeded, tipped with the hardened base of 

 the style. Seeds round-reniform, with very short hilum. Cotyledons thick 

 and fleshy, rising out of the ground nearly unchanged in germination. Twin- 

 ing herbs, with pinnately 3-foliolate stipellate leaves. Flowers racemose, pro- 

 duced in summer and autumn. (The ancient name of the Kidney Bean.) 



1. P. per6nnis, Walt. (WILD BEAN.) Stem climbing high from a 

 perennial root ; leaflets roundish-ovate, short-pointed ; flowers purple, hand- 

 some, but small ; pods drooping, strongly curved, 4 - 5-seeded. Copses, N. 

 Eiig. to Fla., west to Miun. and La. 



