Lycopus virginicus L.

Virginia water horehound (en)

Species

Angiosperms > Lamiales > Lamiaceae > Lycopus

Characteristics

Plants stoloniferous, generally without tubers; stems ± densely appressed-hairy; lvs ± long hairy and on the lower surface usually also short-felty, lanceolate or lance-ovate to elliptic or narrowly rhomboid, 5–12 × 1.5–5 cm, acuminate, coarsely serrate, the lowest tooth not far below the middle of the blade, the margin below it concave and continued along the midvein nearly or quite to the stem; bracts minute; cal 1–1.2 mm, the 4 lobes ovate or triangular-ovate, half to three-fourths as long as the tube; cor generally 4-lobed, but the upper lobe often notched; stamens included or barely reaching the orifice of the cor; nutlets surpassing the cal, the set of 4 almost flat across the tuberculate summit, each 1.5–2 × 0.7–1.3 mm, the inner angle nearly as long as the outer and ending in a tubercle. Mass. to n. Fla., w. to N.Y., Pa., s. Ind., Mo., e. Okla., and e. Tex. (L. membranaceus) Hybridizes extensively with no. 2 [Lycopus uniflorus Michx.] where their ranges overlap, producing a hybrid swarm called L. ×sherardii Steele.
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An erect herb which forms tuber like roots. It grows 20-75 cm tall. It is covered with tiny soft hairs. The leaves are narrowly oval and have coarse teeth along the edge. The leaves can be 3-15 cm long. The flowers are white.
Life form perennial
Growth form herb
Growth support -
Foliage retention deciduous
Sexuality hermaphrodite
Pollination entomogamy
Spread -
Mature width (meter) 0.45
Mature height (meter) 0.6 - 0.68
Root system -
Rooting depth (meter) 0.2
Root diameter (meter) -
Flower color -
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Low damp shady ground in rich moist soils.
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It suits plant hardiness zones 5-9.
Light 3-6
Soil humidity 6-9
Soil texture 1-6
Soil acidity 3-6
Soil nutriment -
Hardiness (USDA) 5-8

Usage

Uses medicinal
Edible roots
Therapeutic use Poison (leaf), Other (root), Pediatric Aid (root), Snake Bite Remedy (root), Poison (root), Ceremonial Medicine (unspecified), Veterinary Aid (unspecified), Astringent (unspecified), Cough (unspecified), Digestive (unspecified), Lung (unspecified), Medicine (unspecified), Narcotic (unspecified), Sedative (unspecified), Tuberculosis (unspecified), Apertif (unspecified), Diarrhea (unspecified), Hemorrhage (unspecified), Diabetes (unspecified)
Human toxicity -
Animal toxicity -

Cultivation

Can be grown by seedlings.
Mode seedlings
Germination duration (days) 42
Germination temperacture (C°) 4
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Leaf

Lycopus virginicus leaf picture by Jeremy Sears (cc-by-sa)
Lycopus virginicus leaf picture by Melanie Lamere (cc-by-sa)
Lycopus virginicus leaf picture by Xeno onex (cc-by-sa)

Flower

Lycopus virginicus flower picture by Melanie Lamere (cc-by-sa)

Distribution

Lycopus virginicus world distribution map, present in Åland Islands, Canada, Micronesia (Federated States of), Georgia, Malaysia, Nicaragua, and United States of America

Conservation status

Lycopus virginicus threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:449692-1
WFO ID wfo-0000231476
COL ID 3WN6W
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Lycopus macrophyllus Euhemus sylvaticus Euhemus officinalis Lycopus virginicus var. macrophyllus Lycopus virginicus var. quercifolius Lycopus virginicus var. pauciflorus Lycopus virginicus