LEGUMINOS^E. (PULSE FAMILY.) 143 



Pod stalked in the persistent calyx, roundish or oblong, inflated, pointed, many- 

 seeded. Perennial herbs, with palmately 3-foliolate (rarely simple) leaves, 

 which generally blacken in drying, and racemed flowers. (Named from /3a7rria>, 

 to dye, from the economical use of some species, which yield a poor indigo. ) 



1. B. tinctbria, R. Br. (WILD INDIGO.) Smooth and slender (2 -3 

 high), rather glaucous; leaves almost sessile ; leaflets rounded wedge-obovate 

 (I' long) ; stipules and bracts minute and deciduou ; racemes few-flowered, terminat- 

 ing the bushy branches ; pods oval-globose, on a stalk longer than the calyx. 

 Sandy dry soil : common. June- Aug. Corolla yellow, ' long. 



2. B. australis, R. Br. (BLUE FALSE-INDIGO.) Smooth, tall and stout 

 (4 -5); leaflets oblong- wedge-form, obtuse; stipules lanceolate, as long as the 

 petioles, rather persistent ; raceme elongated (1 - 2) and many-flowered, erect ; bracts 

 deciduous ; stalk of the oval-oblong pods about the length of the calyx. Alluvial soil, 

 from Pennsylvania westward and southward : often cultivated. June. Flow- 

 ers 1' long, indigo-blue. Pods 2' - 3 ; long. 



3. B. leucantha, Torr. & Gr. Smooth ; stems, leaves, and racemes as in 

 the foregoing ; stipules early deciduous ; pods oval-oblong, raised on a stalk fully twice 

 the length of the calyx. Alluvial soil, Ohio to Wisconsin and southwestward. 

 July. Flowers white ; the standard short. Pods 2' long. 



4. B. alba, R. Br. Smooth (l-3 high) ; the branches slender and widely 

 spreading; petioles slender ; stipules and bracts minute and deciduous; leaflets ob- 

 long or oblanceolate ; racemes slender on a long naked peduncle ; pods linear- 

 oblong (!'-!' long), short-stalked. Dry soil, Virginia and southward. May, 

 June. Flowers white, 6" - 9{' long. 



5. B. leucophsea, Nutt. Hairy, low (1 high), with divergent branches; 

 leaves almost sessile ; leaflets narrowly oblong-obovate or spatulate ; stipules and 

 bracts large and leafy, persistent ; racemes long, reclined ; flowers on elongated pedi- 

 cels ; pods ovoid, hoary. Michigan to Wisconsin and southward. April, May. 

 Raceme often 1, pedicels l'-2', the cream-colored corolla 1', in length. 



32. CLADBASTIS, Raf. YELLOW-WOOD. 



Calyx 5-toothed. Standard large, roundish, reflexed : the distinct keel-petals 

 and wings straight, oblong. Stamens 10, distinct: filaments slender, incurved 

 above. Pod short-stalked above the calyx, linear, flat, thin, marginless, 4-6- 

 seeded, at length 2-valved. A small and handsome tree, with yellow wood, 

 smooth bark, nearly smooth pinnate leaves of 7- 11 oval or ovate leaflets, and 

 ample panicled racemes (10" -20" long) of showy white flowers drooping from 

 the end of the branches. Stipules obsolete. Base of the petioles hollow, and 

 enclosing the leaf-buds of the next year. Bracts minute and fugacious. (Name 

 of obscure derivation.) 



1. C. tinctbria, Raf. (Virgflia lutea, Michx.f.) Rich hillsides, E. Ken- 

 tucky and southward along the western base of the Alleghanies. May, June. 



33. CERCIS, L. RED-BUD. JUDAS-TREE. 



Calyx 5-toothed. Corolla imperfectly papilionaceous : standard smaller than 

 the wings, and enclosed by them in the bud : the keel-petals larger and not 



