153 PRACTICAL BOTANY. 



232. Trees, 20 to 40 feet high 233 



Herbs. Corolla perfectly papilionaceous. Keel- 

 petals nearly separate and, like the wings, straight. Leaves 

 palmately 3-fo!iolate, rarely simple (generally blackening in 

 drying). Flowers yellow, indigo-blue, or white, racemed. 

 Calyx 4- or 6-cleft. Baptisia. 



233. Corolla perfectly papilionaceous. Standard large, 

 roundish, reflexed. Keel-petals distinct, straight. Pod very 

 flat. Leaves pinnate ; leaflets 7-11, oval or ovate. Flowers 

 showy, white, in drooping, panicled racemes. 



Cladrastis tinctoria, Raf. 



Corolla imperfectly papilionaceous. Standard 

 smaller than the wings, and enclosed by them in the bud. 

 Keel-petals larger and distinct. Stamens rather unequal. 

 Leaves rounded-cordate. Flowers red-purple, in small- lateral 

 clusters, preceding the leaves. Cercis Canadensis, L. 



234. Stamens 10 (rarely 9 or 5), monadelphous 235 



Stamens 10, diadelphous (or monadelphous below, 

 and then the pods jointed, or not jointed and l-seeded)..241 



23<S. Anthers of 2 forms. Leaves simple, palmately com- 

 pound, or pinnately 3-foliolate 236 



Anthers all alike 239 



236. Leaves simple 237 



Leaves compound 238 



237. Calyx 2-lipped. Keel straight. Pod flat, several-* 

 seeded. Flowers ydlow, in spiked racemes. A low, shrub- 

 by plant. Genista tinctoria, L. 



Calyx 5-lobed, scarcely 2-lipped. , Keel scythe-shap- 

 ed. Pod inflated, oTiloug, many-seeded. Sheath of filaments 

 cleft on the upper side. Flowers racemed, yellow. Stipules 

 united and decurrent on the stem. Leaves oval or oblong- 

 lanceolate, almost sessile. Crotalaria sagittalis, L. 



238. Leaves pinnately 3-foliolate. Calyx 2-lipped ; 

 upper lip 2-, the lower 3-cleft. Flowers of two sorts inter- 

 mixed in the heads, some complete, but unfruitful, yellow ; 



