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ec. Floral parts polypetalous, inferior. 
aa. Floral parts irregular. 
Viola.—Calyx 5-sepalous. Corolla 5-pet- 
alous. Capsule 8-valved, placente 3; 
each ow-seeded. 
®sculus.—Calyx 5-dentate. Corolla 4— 
5-petalous. Capsule 3-valved, 1-seeded. 
Tree. 
bb. Floral parts regular. 
Acer.—Fruit a2-seeded samara. Trees. 
Shrubs. 
Vitis. —Petals coherent at the apex, and 
caducous at the base, inserted on a disc. 
Fruit baccate. 
Euonymus.—Petals 5, inserted on the 
calyx. Stamens alternating with the 
petals, inserted on a glandular disc. 
Fruit capsular. Shrubs. 
Rhamnus.—Petals 4-5 with short claws, 
inserted on the calyx. Stamens oppo- 
site to the petals. Fruit a drupe with 
several pyrene. Trees. Shrubs. 
Ceanothus.—Calyx and disc adnate to 
the base of the ovary. Stamens oppo- 
site to the petals. Petals with long 
claws cucullate. Fruit a capsule, 3- 
celled; cells 1-seeded. Capsule septici- 
dal. Trees. Shrubs. 
