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Genus MORUS, Linn.

B. Fruit purple; leaves 3 to 5 inches long.

(M. rubra) RED MULBERRY

BB. Fruit black; leaves 1 to 2 inches long.

(M. celtidifolia) MEXICAN MULBERRY

AA. Leaves entire; fruit globular.

B. Fruit 4 to 5 inches in diameter, inedible.