Quercus palustris Münchh.
Common Name: PIN OAK
Coefficient of Conservatism: 8
Coefficient of Wetness: -3
Wetness Index: FACW
Physiognomy: Nt Tree

Quercus palustris B. S. Walters

Characteristic of periodically flooded ground, including forests and edges of wet prairies; often planted and easily grown on upland sites.

Besides the very small and distinctive acorns, the small, acute, nearly glabrous winter buds will usually serve to distinguish this species from Q. ellipsoidalis. The leaves of Q. palustris are said to be usually recognizable by a combination of cuneate base of the blade (decurrent on the petiole) and conspicuous tufts of pubescence remaining until late in the season in the axils of the main veins and often along the midrib beneath. Our specimens, however, often have quite truncate leaf bases, but they do have prominent axillary tufts of pubescence (if not more along the midrib). The habit of pin oak is so distinctive that it can be recognized in winter from a long distance. The trunk is very thick relative to the branches; the lowest branches are persistent and sweep downward.


Allegan County
Berrien County
Calhoun County
Cass County
Genesee County
Gratiot County
Kalamazoo County
Lapeer County
Lenawee County
Macomb County
Mason County
Midland County
Monroe County
Montcalm County
Oakland County
Ottawa County
Saginaw County
St. Clair County
St. Joseph County
Van Buren County
Washtenaw County
Wayne County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. August 15, 2022. https://michiganflora.net/species.aspx?id=1381.