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Rhus glabra, the smooth sumac, (also known as white sumac, upland sumac, or scarlet sumac) is a North American species of sumac in the family Anacardiaceae.
The leaves are alternate, long, compound with 11–31 oppositely paired leaflets. Each leaflet is long, with a serrated margin. The leaves turn scarlet in the fall.
The species is dioecious. The are tiny, green, produced in dense erect tall, in the spring, later followed by large panicles of edible crimson berries that remain throughout the winter. The buds are small, covered with brown hair and borne on fat, hairless twigs.
It can be found in a wide variety of habitats, from streambanks to dry and montane slopes.
In 2020, archaeologists unearthed a pipe at a dig in Central Washington state, showing chemical evidence that a Native American tribe had smoked R. glabra either alone or in a blend with tobacco, perhaps "for its medicinal qualities and to improve the flavor of smoke". An Ancient Residue Metabolomics-Based Method to Distinguish Use of Closely Related Plant Species in Ancient Pipes
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