Included in Scirpus in Michigan Flora.
1. Styles 3-cleft; achenes distinctly 3-angled, 4โ5 mm long; involucres mostly with 3โ5 well-developed bracts; perianth bristles strong, distinctly retrorse-barbed.
B. fluviatilis
1. Styles 2-cleft; achenes biconvex, 3โ4 mm long; involucre with 2 well-developed bracts; perianth bristles weak, scarcely half as long as achene, obscurely barbed.
B. maritimus
All species found in Bolboschoenus
Citation:
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 8, 2019. https://michiganflora.net/genus.aspx?id=Bolboschoenus.