Poison sumac

Definition of Poison sumac

(Bot.) a poisonous shrub formerly considered to be of the genus Rhus (Rhus venenata), but now classified as Toxicodendron vernix; - also called poison ash, poison dogwood, and poison elder. It has pinnate leaves on graceful and slender common petioles, and usually grows in swampy places. Both this plant and the poison ivy (Toxicodendron radicans, formerly Rhus Toxicodendron) have clusters of smooth greenish white berries, while the red-fruited species of this genus are harmless. The tree (Rhus vernicifera) which yields the celebrated Japan lacquer is almost identical with the poison sumac, and is also very poisonous. The juice of the poison sumac also forms a lacquer similar to that of Japan.
(Bot.) See under Poison.

See also: Poison Sumac

Related Words

Rhus dermatitis
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