Research > Reference Library > Trees of Canada JOIN MAIL LIST: SEARCH: Discover GF Research Education Newsroom How to Help click image to enlarge Sumac poison sumacRhus vernix L. Poison sumac is a small (<7 m) tree. The fruits and leaves are, as the name infers, poisonous. staghorn sumacRhus typhina L. Staghorn sumac has stout woolly branches, and during the winter they resemble the velvety antlers of a deer. In the autumn the leaves turn a spectacular shade of red.
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