io8 LEGUMINOSAE. 



4. Leaflets scarcely 20 mm. long : flowers axillary. C. hirsutus. 

 Leaflets nearly 25 mm. long : flowers in heads. C. supinus. 



AMORPHA. False Indigo. 



Deciduous shrubs with slender more or less sulcate 

 branches ; rather 3-sided homogeneous pith ; white wood with 

 minute ducts, somewhat more crowded in spring and in wavy 

 tangential lines in summer, and tine medullary rays ; alternate 

 crescent-shaped somewhat raised leaf-scars with 3 bundle- 

 traces ; small stipule-scars ; appressed small ovoid buds with 

 about 4 exposed scales ; odd-pinnate glandular-punctate leaves ; 

 small papilionaceous more or less violet flowers ; and small 

 glandular pods. 



1. Leaves nearly sessile: gray. (Lead plant). A. canescens. 

 Leaves distinctly stalked. 2. 



2. Hairy when young. A. fruticosa. 

 Glabrous. A. glabra. 



WISTERIA. Wistaria. 



Deciduous twining shrubs with rather slender subterete 

 twigs ; moderate somewhat angled continuous pith ; alternate 

 elevated half-round or squarish leaf-scars, short-spurred at base, 

 with 3 compound bundle-traces ; no stipule-scars ; sessile round 

 or ovoid buds with about 3 exposed scales ; large odd-pinnate 

 leaves with short-stalked entire leaflets ; perfect showy papil- 

 ionaceous flowers in terminal panicles; and moniliform legumes 

 with several large plump seeds. 



1. Flowers appearing before the leaves, scentless. 2. 

 Flowers appearing after the leaves, fragrant. 3 



2. Panicles 30 cm. long. W. floribunda. 

 Panicles 50-90 cm. long. W. floribunda macrobotrys. 



3. Panicles short (8-10 cm.), glandless. W. frutescens. 

 Panicles moderate (15 cm. or more) : pedicels and calyx 



pubescent and also glandular-papillate. W. macrostachys. 



ROBINIA. Locust. Rose Acacia. 



Deciduous trees, sometimes with stipular spines, with hard 

 yellow and brown wood with the larger ducts somewhat crowded 



