96 leguminosjE. (pulse family.) 



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

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

 the presence of lead-ore. 



11. ROBINIA, L. Locust-tree. 



Calyx short, 5-toothed, slightly 2-lippcd. 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 Henry IV. of France, and his son 

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



1. 15. Pscudacacia, L. (Common Locust, or False Acacia.) 

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

 S. Pennsylvania to S. Illinois and southward. Commonly cultivated as an orna- 

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



2. It. viscosa, Vent (Clammy Locust.) Dranchlets and leafstalks 



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

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

 the last, u smaller tree. June. 



3. K. llispula, L. (Bhistly or Rose Acacia.) Branchlets 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 AVI ST ARIA, Nntt Wistaria. 



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

 of 3 longer ones. Standard roundish, large, 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, large. A twining shrubby 

 plant, with minute stipules, pinnate leaves of 9-13 ovatc-lanccolate leaflets, not 

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

 cated to the late Professor Wistar, of Philadelphia.) 



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

 southward. Sometimes cultivated for ornament. May. 



13. TEPHROSIA, Pcrs. Hoary 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-valvcd.— 

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

 flowers. Leaflets mucronate, veiny. (Name from Tempos, ash-colored or hoary.) 



