General: Laurel Family (Lauraceae). Native shrubs, growing mostly 1-3(-5) meters tall, sometimes a small tree; reproducing asexually by root sprouting (most spicebush pathes and thickets are probably clonal). Leaves are thin, deciduous, glabrous or sparsely pubescent on the lower surface, obovate to oblong or elliptic, 6-14 cm long, pointed at both ends, entire, on petioles 5-12 mm long, usually largest at the branch tips, decreasing in size down the branch. Flowers appearing before the leaves, in clusters on nodes of last year’s growth, either staminate (pollen-producing), with 9 fertile stamens, or pistillate (with a fertile ovary and 12-18 rudimentary, infertile stamens), both types with 6 short, yellowish sepals, the female and male on different plants (the species dioecious). Fruit is a short-stalked, ellipsoid, shiny-red berry 6-10 mm long, with a single seed. The common name refers to the sweet, spicy fragrance of the stems, leaves, and fruits when bruised.
Variation within the species: Lindera benzoin var. pubescens (Palmer & Steyermark) Rehd. is the more southern form of the species, absent from the northernmost states of the species range, with twigs and lower leaf surfaces hairy (vs. glabrous in var. benzoin). Var. benzoin does not occur in the states directly bordering the Gulf of Mexico.
Two closely related species (the only other species of the genus in North America) occur in the southeastern US, where they are rare throughout their range –– Lindera melissifolia (Walt.) Blume, pondberry or southern spicebush, and Lindera subcoriacea B.E. Wofford, bog spicebush. Allozyme studies of populations of spicebush and pondberry show that both species have low levels of genetic diversity.
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