Dicotyledones. 65 



LEGUMINOS^. PULSE FAMILY. 



Herbs, trees, or shrubs, with papilionaceous or more or less irregular 

 flowers, and alternate, stipulate, pinnately or palmately compound 

 leaves. Stamens usually 10, monadelphous, diadelphous, or some- 

 times distinct. Ovary superior, of a single carpel, and becoming a 

 legume in fruit. 



Herbs. 



Stamens distinct. BAPTISIA I. 



Stamens diadelphous, or sometimes all united near the base. 



Leaves palmately 3-foliate. TRIFOLIUM II. 



Leaves odd-pinnate. ASTRAGALUS VI. 



Leaves abruptly pinnate. VICIA VII. 



Herbs or sometimes shrubs. 



Stamens distinct or united only at the base. 



Leaves bipinnately compound; stamens 8-12. SCHRANKIA XI. 



Leaves bipinnately compound; stamens 10-5. DESMANTHUS XII. 



Stamens monadelphous or diadelphous. PSORALEA III. 



Trees or shrubs. 



Stamens distinct or united only at the base. 

 Leaves once or twice pinnately compound. 



Trees without thorns. GYMNOCLADUS IX. 



Trees with conspicuous thorns. GLEDITSCHIA X. 



Leaves simple. CERCIS VIII. 



Stamens monadelphous; leaves odd-pinnate. AMORPHA IV. 



Stamens diadelphous; leaves odd-pinnate. ROBINIA V. 



I. BAPTISIA. False Indigo. 

 (Gr., baptisis, dipping or dyeing.) 



Erect, perennial herbs, with palmately 3-foliate or rarely simple 

 leaves. Flowers yellow, white, or blue, truly papilionaceous, borne in 

 racemes. Stamens 10 and distinct; ovary stipitate, and pod inflated. 

 Standard about equaling the wings and keel, its sides reflexed. 



1. Baptisia tinctoria, R. Br. (L., tinctorius, pertaining to dyeing.) WILD 

 INDIGO. Erect, glabrous, 2 to 4 feet high. Leaves 3-foliate, the leaflets obovate 

 or oblanceolate, petioles short. Flowers yellow. Pods raised on a stipe longer 

 than the calyx, and tipped with the awl-shaped style. In dry soil. 



2. Baptisia leucophaea, Nutt. (Or., leukos, white; phaios, gray.) LARGE- 

 BRACTED WILD INDIGO. About i foot high, with divergent branches, pubes- 

 cent throughout. Leaves 3-foliate, sessile, or short-petioled; leaflets spatulate or 

 oblanceolate, with ovate or lanceolate, persistent stipules. Flowers white or cream 

 color, about i inch long, borne in a many-flowered raceme, which sometimes 

 becomes i foot long. Pods hoary, pointed at both ends. On prairies. 



