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Lycopus americanus - Muhl.

Common Name Water Horehound, American water horehound
Family Lamiaceae or Labiatae
USDA hardiness 4-8
Known Hazards None known
Habitats Low moist or wet places[222, 274].
Range N. America - Newfoundland to British Columbia, south to Florida, Texas, Utah and California.
Edibility Rating    (1 of 5)
Other Uses    (0 of 5)
Weed Potential Yes
Medicinal Rating    (3 of 5)
Care
Fully Hardy Moist Soil Wet Soil Semi-shade Full sun
Lycopus americanus Water Horehound,  American water horehound


Robert H. Mohlenbrock @ USDA-NRCS PLANTS Database / USDA SCS. 1989. Midwest wetland flora: Field office illustrated guide to plant species. Midwest National Technical Center, Lincoln.
Lycopus americanus Water Horehound,  American water horehound
USDA-NRCS PLANTS Database / USDA NRCS. Wetland flora: Field office illustrated guide to plant species. USDA Natural Resources Conservation Service.

 

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Summary


Physical Characteristics

 icon of manicon of flower
Lycopus americanus is a PERENNIAL growing to 0.5 m (1ft 8in).
It is hardy to zone (UK) 4. It is in flower from July to September. The species is hermaphrodite (has both male and female organs) and is pollinated by Bees, flies.
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils. Suitable pH: acid, neutral and basic (alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers moist or wet soil.

UK Hardiness Map US Hardiness Map

Synonyms

Habitats

 Bog Garden;

Edible Uses

Edible Parts: Root
Edible Uses:

Root - raw or cooked[207]. This contradicts with the report in [200] that the plant does not form tubers on its rhizomes.

Medicinal Uses

Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.
Astringent  Narcotic  Sedative

The whole plant is used as an astringent, hypoglycaemic, mild narcotic and mild sedative[4, 102, 222, 238]. It also slows and strengthens heart contractions[238]. The plant has been shown to be of value in the treatment of hyperthyroidism[222, 238], it is also used in the treatment of coughs, bleeding from the lungs and consumption, excessive menstruation etc[4, 238]. It should not be prescribed for pregnant women or patients with hypothyroidism[238]. The plant is harvested as flowering begins and can be use fresh or dried, in an infusion or as a tincture[4, 238].

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Other Uses

Dye

The juice gives a permanent colour to linen and wool and does not wash out[207]. The colour is not mentioned[K].

Special Uses

Cultivation details

Succeeds in damp meadows or in wet places by ponds or streams[200].

Temperature Converter

Type a value in the Celsius field to convert the value to Fahrenheit:

Fahrenheit:

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Propagation

Seed - sow spring or autumn in a cold frame[238]. Prick out the seedlings into individual pots when they are large enough to handle and grow them on in the greenhouse for their first year. Plant them out into their permanent positions in early summer. Division in spring or autumn[238]. Larger clumps can be replanted direct into their permanent positions, though it is best to pot up smaller clumps and grow them on in a cold frame until they are rooting well. Plant them out in the spring.

Other Names

If available other names are mentioned here

Found In

Countries where the plant has been found are listed here if the information is available

Weed Potential

Right plant wrong place. We are currently updating this section. Please note that a plant may be invasive in one area but may not in your area so it’s worth checking.

Conservation Status

IUCN Red List of Threatened Plants Status :

Related Plants
Latin NameCommon NameHabitHeightHardinessGrowthSoilShadeMoistureEdibleMedicinalOther
Lycopus amplectensClasping water horehoundPerennial1.2 0-0  LMHSNMWe10 
Lycopus asperRough BugleweedPerennial0.6 -  LMHSNMWe11 
Lycopus europaeusGypsywortPerennial1.0 4-8  LMHSNMWeWa13 
Lycopus lucidusBugleweed, Rough bugleweedPerennial1.0 0-0  LMHSNMWe12 
Lycopus maackianus Perennial0.6 -  LMHSNMWe10 
Lycopus uniflorusBugleweed, Northern bugleweedPerennial0.3 4-8  LMHSNMWe31 
Lycopus virginicusBugleweed, Virginia water horehoundPerennial0.6 4-8  LMHSNMWe23 

 

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Expert comment

Author

Muhl.

Botanical References

200235

Links / References

For a list of references used on this page please go here

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Subject : Lycopus americanus  
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