1. Leaves lacking a single prominent raised midvein, but with 2–several clearly separate veins of ± equal strength along with numerous fainter veins, the leaf thus not obviously ridged to the naked eye; fruit maturing.
1. Leaves with a single prominent raised midvein (best observed at about 1/2 to 2/3 of the length of the leaf) that is much more conspicuous than any other veins, appearing as a ridge to the naked eye; fruits not maturing.
All species found in Acorus
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. March 25, 2019. https://www.michiganflora.net/genus.aspx?id=Acorus.