Schoenoplectiella hallii (A. Gray) Lye
Synonym: Scirpus hallii, Schoenoplectus hallii
Coefficient of Conservatism: 10
Coefficient of Wetness: -5
Wetness Index: OBL
Physiognomy: Nt A-Sedge
Status: T
Schoenoplectiella hallii achenes A. A. Reznicek achenes

Scirpus hallii of Michigan Flora.

Sandy/peaty open shores of lakes; sandy, intermittently moist swales and depressions.

The achenes of S. hallii tend to be more persistent than their scales and thus are conspicuous. This is a rare plant that only appears sporadically in its habitat, and is known from few widely scattered colonies (McKenzie & Smith 2007).

Schoenoplectiella hallii is unusual in not only producing achenes from aerial spikelets, similar to our other species, but also bearing specialized achenes hidden singly inside the sheaths at the very base of the plant. This is termed amphicarpy. These basal achenes are substantially larger, more clearly triangular, more strongly apiculate, and less strongly ridged than those from the aerial spikelets.


Allegan County
Muskegon County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. July 27, 2021.