Largely sterile hybrid of nos. 1 [Mentha arvensis L.] and 4 [Mentha aquatica L.], approaching no. 1 in the form of the infl, but more robust, often hairier, with narrower cal-teeth, and with a sickly odor; 2n=42-132. European cultigen, rarely intr. with us.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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