Trees of Alabama and the Southeast

Lisa Samuelson, Ph.D.
School of Forestry and Wildlife Sciences
Auburn University

Trifoliate Orange
Poncirus trifoliata
Rutaceae

Leaves are trifoliately compound, alternate and deciduous with ovate to round leaflets and a green-winged rachis. Twigs are stout, green and flat with stout, sharp thorns. Bark is green-brown and smooth. Flowers are in white clusters before the leaves. Fruit is a yellow orange with a sticky skin. Trifoliate orange is a shrub or small tree that has naturalized in woodlands and fencerows in the southeastern U.S.

Photographs by Mike Hogan.

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