Rhus typhina is a northern plant, ranging from New Brunswick to Minnesota. It comes into Iowa in the northern counties only, being found in Allamakee and Clayton counties, but, so far as reported, nowhere else. The plant along the bluffs of the Mississippi River rises to a height of some thirty feet and has a stem at base six inches in diameter. It is a beautiful shrub or tree, differing, at sight, by its velvety branches and long-pointed leaflets, from the ordinary sumac (Rhus glabra L.) and well worthy a place in our dooryards to say nothing of a wider and better acquaintance. "Where it prevails it seems to exclude the other species. I have never found R. typhina and R. glabra on the same hillside. That the plant should extend down the Mississippi River on the bluffs to McGregor and Lansing or thereabouts and not go farther south along the same stream is an interesting fact in connection with the problems of plant distribution.
Proceedings of the Iowa Academy of Sciences
©1893 Iowa Academy of Science, Inc.
MacBride, T. H.
"Rhus typhina Linn,"
Proceedings of the Iowa Academy of Science, 1(Pt. 4), 65-65.
Available at: https://scholarworks.uni.edu/pias/vol1/iss4/25