Please try our next iteration of the Michigan Flora Online here. Beginning on February 1, 2023, will point to this new site.

The new site offers several benefits over the existing website, including real coordinate mapping, giving a clearer view of the density of documentation as well as more precision about plant distributions and their link to landforms. We will also have the ability to update species pages more regularly, both in terms of new collections and as more existing Michigan specimens are georeferenced. In addition, we have a better photo display, and offer indented keys.

Patis racemosa (Sm.) Romasch., P.M. Peterson & Soreng
Common Name: RICE-GRASS
Synonym: Oryzopsis racemosa, Piptatherum racemosum
Coefficient of Conservatism: 8
Coefficient of Wetness: 5
Wetness Index: UPL
Physiognomy: Nt P-Grass

Oryzopsis racemosa of Michigan Flora.

Usually in moist rich deciduous forests and forested dunes, sometimes in disturbed places; less often associated with jack pine and oak.

The awn of the lemma may be as long as 23 mm in this species, although usually less than 20 mm. The widest leaf blades are usually 1 cm or more broad.

Romaschenko et al. (2011) provide the rational for segregating Patis, a grass genus with an eastern Asian eastern North American disjunct distribution, like Brachyelytrum and Zizania.


Allegan County
Barry County
Benzie County
Berrien County
Charlevoix County
Delta County
Dickinson County
Emmet County
Grand Traverse County
Ingham County
Jackson County
Kalamazoo County
Kent County
Leelanau County
    Including Manitou Islands
Mackinac County
Marquette County
Mason County
Menominee County
Montcalm County
Muskegon County
Newaygo County
Oakland County
Ontonagon County
Ottawa 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. January 28, 2023.