128 KEY AND FLORA 



C 



Herbs or trees. Floicers decidedly papUionaceous. The upper petal ex- 

 ternal in hud and inclosing the others. Stamens 10, not united to each 

 other. 



Trees. Cladrastis, VII 



Herbs. Pod inflated. Baptisia, YI 



Herbs. Pod elongated, necklace-shaped. Sophora, YIII 



D 



Shrubs with a corolla of one petal onli/. Amorplia, XTI 



E 



Herbs, shrubs, or trees. Flowers decidedly papilionaceous. Stamens 

 monadelphous or diadelphous (in the latter case usually 9 and 1). 



1. Stamens with anthers of two forms. 



(a) Herbs. Leaves usually with many leaflets. Lupinus, IX 

 (/;) Herbs. Leaves with 3 entire leaflets. Psoralea, XY 

 (o) Trees. Laburnum, X 

 ((/) Low shrubs. Cytisus, XI 



2. Anthers all alike. Leaves usually wdth 3 leaflets. 



{a) Pod coiled. Medicago, XIY 



(b) Pod small, not coiled. Flow^ers in racemes. . 



Melilotus, XIII 



(c) Pod small, not coiled. Flowers in heads. Trifolium, XII 

 {d) Pod large, flattened, bur-like. ■ Desmodium, XX 



(e) Pod large, not much flattened. Phaseolus, XXIY 



3. Anthers all alike. Leaves odd-pinnate, with more than 3 



leaflets, 



(fl) Low, woody shrubs. • Amorpha, XYI 



{h) Tall, twining shrubs. Wisteria, XA^III 



(f) Trees. Robinia, XYII 

 {(l) Herbs. Astragalus, XIX 



4. Anthers all alike. Leaves pinnate, the midrib prolonged into 



a tendril. 



