Leaves alternate.
B. Leaves entire.
Trees with thorns and a milky sap. Maclura in
Moraceæ 155
Trees without thorns, sap not milky.
Leaves 3-5 nerved at the base.
Leaves 3-nerved at the base. Celtis in
Ulmaceæ 146
Leaves 5-nerved at the base. Cercis in
Cæsalpinaceæ 227
Leaves with 1 primary nerve.
Leaves usually more than 1.5 dm.
(6 inches) long, flowers solitary.
Flowers appearing before or with the
leaves. Anonaceæ 161