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Key to Species — Part 22

A. Blooming before the leaves in spring.

B. Twigs smooth.

C. Branches corky winged.

(U. alata) WAHOO or WINGED ELM

CC. Branches not corky winged.

(U. Americana) AMERICAN or WATER ELM

BB. Twigs pubescent.

C. Branches corky.

(U. Thomasi) CORK ELM

CC. Branches not corky; leaves rough above; twigs and buds with coarse, rusty hairs.

(U. fulva) SLIPPERY ELM

AA. Blooming late in summer or autumn.

B. Leaves over 2 inches long, thin.

(U. serotina) RED ELM

BB. Leaves 1 to 2 inches long, thick.

(U. crassifolia) CEDAR ELM