Lindera benzoin (wild allspice, spicebush, common spicebush, northern spicebush or Benjamin bush) is a flowering plant in the family Lauraceae, native to eastern North America, ranging from Maine to Ontario in the north, and to Kansas, Texas and northern Florida in the south.
Spicebush is a medium-sized deciduous shrub growing to 5 m tall, typically found only in the understory of moist thickets. The leaves are alternate, simple, 6–15 cm long and 2–6 cm broad, oval or obovate and broadest beyond the middle of the leaf. They are very aromatic when crushed, hence the common names and the specific epithet "benzoin." The flowers grow in showy yellow clusters that appear in early spring, before the leaves begin to grow. The fruit is a berrylike red drupe about 1 cm long and is highly prized by birds. It has a peppery taste and scent, and contains a large seed. Spicebush is dioecious (plants are either male or female), so that both sexes are needed in the garden if one wants berries with viable seed.
Spicebush is a favorite food plant of two handsome lepidopterous insects: the spicebush swallowtail Papilio troilus, and the promethea silkmoth, Callosamia promethea. The larvae of the spicebush swallowtail are easily found inside leaves that have been folded over by the application of silk; small larvae are brown, resembling bird droppings, mature larvae are green, with eyespots resembling the head of a snake. Since there are typically several broods (generations) of spicebush swallowtails each year, spicebush is a useful plant for the butterfly garden, since the egglaying females are strongly attracted to it. Promethea moth cocoons, if present, can be found in the winter, resembling dead leaves still hanging from the twigs. Neither of these insects is ever present in sufficient quantities to defoliate a spicebush of medium to large size, although very small specimens may suffer even from a single caterpillar.