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Lycopus americanus Muhl. ex W.P.C. Barton
American water horehound, Water Horehound
Synonym(s): Lycopus americanus var. longii, Lycopus americanus var. scabrifolius, Lycopus sinuatus
USDA Symbol: lyam
USDA Native Status: L48 (N), CAN (N)
Tiny, white, tubular flowers clustered in dense groups around a square stem in axils of opposite leaves.
The members of this group are non-aromatic mints and are typical of wet sites. The various species are distinguished on the basis of technical details. They are sometimes called bugleweeds because of the resemblance of each flower to a bugle. Other species have less coarsely toothed leaves. The genus name is from the Greek lycos (a wolf) and pous (foot) and refers to the likeness of some species leaves to a wolfs footprint. About 10 species of Lycopus occur in eastern North America; most are very similar, making identification difficult.
Plant CharacteristicsDuration: Perennial Habit: Herb Leaf:
Bloom InformationBloom Color: White
Bloom Time: Jun , Jul , Aug , Sep
, WY Canada: NB
, PE Native Distribution:
Throughout North America, except far north and Nevada. Native Habitat:
Moist sites, shorelines, and wetlands.
Growing ConditionsWater Use: High
Light Requirement: Shade
Soil Moisture: Moist , Wet
CaCO3 Tolerance: Medium
BenefitConspicuous Flowers: yes
National Wetland Indicator Status
This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1
(Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here
for map of regions.
From the National Organizations Directory
According to the species list provided by Affiliate Organizations, this plant is either on display or available from the following:
Native Seed Network
- Corvallis, OR
Record Last Modified: 2012-05-07
Research By: TWC Staff