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B. Genuinely diadelphous. 
a. Style not pilose. 
1. Hosackia.—Petals unguiculate. Carina 
rostrate. 
2. Trifolium.—Petals persistent, adnate to 
the stamineal tube. 
3. Psoralea.—Wings of the corolla adnate 
to the carina. Ovary sessile, 1-ovulate. 
Legume indehiscent, included in the 
calyx. 
4. Glycyrrhiza.—Petals not adnate to the 
stamineal tube. Carina 2-petalous. 
5. Astragalus—Petals not adnate to the 
stamineal tube. Carina blunt. Legume 
imperfectly 2-celled. 
6. Melilotus.—Petals not adnate to the stam- 
ineal tube. Ovary straight. Legume 
globose. 
7, Medicago.—Petals not adnate to the 
stamineal tube. Ovary crescent-shaped. 
Legume spiral. 
b. Style pilose. 
1. Lathyrus.—Style pilose only on the ven- 
tral side which is flattened. 
2.  Vicia.—Style pilose on the dorsal side, 
or all around the apex. Style not spi- 
ral. 
