1. a coarse Old World wild water mint having long leaves and spikelike clusters of flowers; naturalized in the eastern United States; [syn: horsemint, Mentha longifolia]
WordNet (r) 3.0 (2006):
Mentha longifolia
n 1: a coarse Old World wild water mint having long leaves and
spikelike clusters of flowers; naturalized in the eastern
United States [syn: horsemint, Mentha longifolia]