140 LEGUMIXOSiE. (PULSE FAMILY.) 



elliptical; upper stipules much larger: corolla pale purple. (L. myrtifolius, 

 Miihl.) — W. New Enfihind to Virginia and northward, July. — Ordinarily 

 appears quite distinct IVoni L. palustris ; but intermediate specimens occur. 



T). L. I'UATENsis, L. Low and straggling ; leajlets a sinrjle pair, narrow< 

 lanceolate ; stipules large ; peduncles several-flowered ; corolld yellow. — Spon- 

 taneous and abundant along the Connecticut at West Springlield, Mass., 

 A. P. Foster. July. (Adv. from Eu.) 



24. API OS, Bocrliaave. GRorND-NUT. Wii.p 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 diadeljihous. 

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

 perennial herb (with some milky juice !), bearing edible tubers on underground 

 shoots, twining and climbing over bushes. Leaflets 5-7, ovate-lanceolate, ob- 

 scurely stipellate. Flowers in dense and short, often branching racemes. 

 (Name from ("nriov, a pear, from the shape of the tubers.) 



1. A. tuberdsa, Ma-nch. (Glycine Apios,Z.) — Low grounds ; common. 

 Aug. -Sept. — Flowers brown purple, or chocolate-color, violet-scented. 



25. PHASEOLUS, L. Kidney Bean. 



Calyx 5-toothcd or 5-cleft, the two upjior teeth often higher united. Keel of 

 the corolla, witii the included stamens and style, spirally coiled or curved into 

 a ring. Stamens diadelphous. Style bearded along the uj>per side: stignui 

 oblique or lateral. Pod linear or scythe-shaped, several - many-seeded, tipped 

 with the hardened base of the style. Cotyledons thick and fleshy, rising out 

 of the ground nearly unchanged in germination. — Twining or prostrate herbs, 

 •with pinnately 3-foliolatc stipellate leaves. Flowers often clustered on the 

 knotty joints of the raceme, produced in summer and autumn. (The ancient 

 name of the Kidney Bean.) 



* Pods scymdar-shaped: racemes long and loosi', panichd. 



1. P. perennis, Walt. ( Wilu Bean.) Stem climbing high from a per- 

 ennial root ; leaflets roundish-ovate, short-pointed ; pods drooping, strongly 

 curved, 4-.5-seeded. — Copses, Connecticut to Illinois, and southward. — Flow- 

 ers purple, handsome, but small. 



* * Pods long and straight, linear, rather terete : Jloiversfew in a short mistered and 

 I ong-prduncled raceme. (Strophostyles, Ell.) 



2. P. diversifdlius, Pers. Annual; stem prostrate, spreading, rough- 

 hairy ; leajh-ts! ov<ite-:Uub('d, or angled to\\ards the base, or some of them oblong- 

 ovate and entire ; i)eduneles at length twice the length of the leaves. — Sandy 

 fields and banks, coast of Massachusetts and along the Great Lakes to 

 Illinois and southward. — Corolla greenish-white, tinged with red or purple. 

 Pod thickish. 



3. P. h^lVOluS, L. Perennial, hiury ; stems diffuse, slender ; hajkts ovate 

 or ohioni, entire or obscurely angled; peduncles 3-6 times the length of the leaves. 

 — Sandy fields, S. New York to Illinois and southward. — More slender than 

 the last : pods narrower : flowers as large and similar. 



