128 KEY AND FLORA 
c 
Herbs or trees. Flowers decidedly papilionaceous. The upper petal ex- 
ternal in bud and inclosing the others. Stamens 10, not united to each 
other, 
Trees. Cladrastis, VII 
Tlerbs. Pod inflated. Baptisia, VI 
Herbs. Pod elongated, necklace-shaped. Sophora, VHI 
D 
Shrubs with a corolla of one petal only. Amorpha, XVI 
E 
2 
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 
(b) Herbs. Leaves with 3 entire leaflets. Psoralea, XV 
(c) Trees.y Laburnum, 
(7) Low shrubs. Cytisus, XI 
2, Anthers all alike. Leaves usually with 3 leaflets. 
(a) Pod coiled. Medicago, XIV 
(b) Pod small, not coiled, Flowers in racemes. 
Melilotus, NITT 
(c) Pod small, not coiled. Flowers in heads. Trifolium, NIT 
(7) Pod large, flattened, bur-hke. Desmodium, XX 
(e) Pod large, not much fkittened. Phaseolus, NNITV 
3. Anthers all alike. Leaves odd-pinnate, with more than 3 
leaflets. 
(a) Low, woody shrubs. Amorpha, XVI 
(/) Tall, twining shrubs. Wisteria, NVIIT 
(c) Trees. Robinia, XVII 
(d) Herbs. Astragalus, XTX 
4. Anthers all alike. Leaves pinnate, the midrib prolonged into 
a tendril. 
