96 LEGUMINOS^. (pulse FAMILY.) 



surface smoothish with age; pods 1 -seeded. — Prairies and crevices of rocks, 

 Michigan to Wisconsin and southwestward. July. — Supposed to indicata 

 the presence of lead-ore. 



11. ROBINIA, L. LocusT-TBEE. 



Calyx short, 5-toothed, slightly 2-lipped. Standard large and rounded, 

 turned back, scarcely longer than the wings and keel. Stamens diadelphous. 

 Pod linear, flat, several-seeded, margined on the seed-bearing edge, at length 2- 

 valved. — Trees or shrubs, often with prickly spines for stipules. Leaves odd- 

 pinnate, the ovate or oblong leaflets stipellate. Flowers showy, in hanging 

 axillary racemes. Base of the leaf-stalks covering the buds of the next year. 

 (Named in honor of John Robin, herbalist to Heniy IV. of France, and his son 

 Vespasian Sobin, who first cultivated the Locust-tree in Europe.) 



1. R. Pseudacacia, L. (Common Locust, or False Acacia.) 

 Branches naked ; racemes slender, loose ; flowers white, fragrant ; pod smooth. — 

 S. Penn. and southward along the mountains : commonly cultivated as an orna- 

 mental tree, and for its invaluable timber : naturalized in some places. June. 



2. R. viscosa. Vent. (Clammy Lochst.) BrancUets and leafstalks 

 clammy ; flowers crowded in oblong racemes, tinged with rose-color, nearly inodor- 

 ous ; pod glandular-hispid. — S. W. Virginia and southward. Cultivated, like 

 the last, a smaller tree. June. 



3. R. Ilispida, L. (Bkistly or Rose Acacia.) BrancUets and stalks 

 bristly ; flowers large and deep rose-color, inodorous ; pods glandular-hispid. — 

 Varies with less bristly or nearly naked branchlets ; also with smaller flowers, 

 &c. — Mountains of S. Virginia and southward: commonly cultivated. May, 

 June. — Shrubs 3° - 8° high. 



12. tVISTARIA, Nutt. Wistaria. 



Calyx campannlate, somewhat 2-lipped ; upper lip of 2 short teeth, the lower 

 of 3 longer ones. Standard roundish, largo, turned back, with 2 callosities at 

 its base : keel scythe-shaped : wings doubly auricled at the base. Stamens 

 diadelphous. Pod elongated, thickish, nearly terete, knobby, stipitate, many- 

 seeded, at length 2-valved. Seeds kidney-shaped, lai-ge. A tvrining shnibby 

 plant, with minute stipules, pinnate leaves of 9-13 ovate-lanceolate leaflets, not 

 stipellate, and dense racemes of large and showy lilac-purple flowers. (Dedi- 

 cated to the late Professor Wisiar, of Philadelphia.) 



1. W. frutescens, DC. — Eich alluvial soil, Virginia to Illinois and 

 southward. Sometimes cultivated for ornament. May. 



13. TEPHROSIA, Pers. Hoaet Pea. 



Calyx about equally 5-cleft. Standard roundish, usually silky outside, 

 turned back, scarcely longer than the coherent wings and keel. Stamens 

 monadelphous or diadelphous. Pod linear, flat, several-seeded, 2-valved. — 

 Hoary perennial herbs, with odd-pinnate leaves, and "white or purplish racemcd 

 flowers. Leaflets mucronatc, veiny. (Name from Ti(f>p6s, ash-colored or hoanj.) 



