M. maximiliana F. Schultz. Tucker obtained it from Dr. R. M. Harley and it was originally from the County of Cornwall, England. (MJM - Terminal, capitate, male sterile flower heads. Leaves aquatica-like, also in growth habit. Hairy, like aquatica, very bland odor, possibly weak menthone, definitely not piperitone. This strain might be a secondary hybrid having 103 chromosomes. The odor and appearance agree with this possibiblity).