Geum macrophyllum Willd.
Coefficient of Conservatism: 5
Coefficient of Wetness: -3
Wetness Index: FACW
Physiognomy: Nt P-Forb

Geum macrophyllum A. A. Reznicek

Northern hardwoods, especially along borders, trails, clearings, and rivers; meadows and ditches.

The characteristic large cordate to reniform terminal segment of the basal leaves is a feature also sometimes occurring in G. aleppicum and G. rivale, both of which are therefore sometimes confused with G. macrophyllum. The head of achenes in G. rivale is elevated on a stalk, and the beak is conspicuously hairy though it may also be glandular; in G. macrophyllum the receptacle is essentially sessile, and the beak is only glandular-puberulent. The beak of G. aleppicum has only a few long hairs at its base. Both may have pilose achene bodies. Plants with the leaflets of the basal (and other) leaves incised, with ± cuneate segments, have been called G. macrophyllum var. perincisum (Rydb.) Raup.

A Dodge collection, June 12 1916, in BLH, is labeled "Vicinity of Port Huron," but Dodge's own herbarium at MICH contains a June 12, 1916 collection from Ontario by N. Tripp, and the BLH sheet is likely a mislabeled duplicate of this. 


Alger County
Baraga County
Chippewa County
Gogebic County
Houghton County
Luce County
Marquette County
Ontonagon County
Schoolcraft County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. March 21, 2018.