128 KEY AND FLORA 



C 



Herbs or trees. Flowers decidedly papilionaceous. The upper pe'al ex- 

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

 other. 



Trees. Cladrastis, VII 



Herbs. Pod inflated. Baptisia, VI 



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



D 



Shrubs with a corolla of one petal only. Amorpha, XVI 



E 



Herbs, shrubs, or trees. Floicers 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 



(6) Herbs. Leaves with 3 entire leaflets. Psoralea, XV 



(c) Trees. Laburnum, X 



(c?) Low shrubs. Cytisus, XI 



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



(a) Pod coiled. Medicago, XIV 



(6) Pod small, not coiled. Flowers in racemes. 



Melilotus, XIII 



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

 (rf) Pod large, flattened, bur-like. Desmodium, XX 



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



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



leaflets. 



(a) Low, woody shrubs. Amorpha, XVI 



(i) Tall, twining shrubs. Wisteria, XVIII 



(c) Trees. Robinia, XVII 



(rf) Herbs. Astragalus, XIX 



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

 a tendril. 



