Lycopus americanus

Characteristics
Dicots
Lamiaceae
Lycopus
Lycopus americanus Muhl. ex W. P. C. Barton
American Water Horehound
forb
4
**
Native AGCP (OBL), EMP (OBL) (NWPL) TN[SNR] KY[S5] (State Rank) G5 (Global Rank)
Anther Type
Dorsifixed
Armaments
No
Base Flower Color
White
Carpel Number/Pistil
2
Duration
Perennial
Fruit Dehiscence
No
Fruit Type
Nutlet; Schizocarp
Fruit Wet/Dry
Dry
General Ecology
Terrestrial; Mudflat/Wet Woods
Growth Habit
forb
Leaf Arrangement
opposite
Leaf Complexity
simple
Leaf Duration
deciduous
Leaflet Number
0
Moisture Requirements
Mesic; Hydric; Inundated
Natural Area Presence
PCSF; FCFSP; LGS; DRU; GILES; GRSM; RCSP; BE
Ovary Position
Superior
Overall Flower Symmetry
Zygomorphic
Ovules per Carpel
2
Parent Rock
Calcareous; Chert; Limestone; Sandstone
Perianth Present
Yes
Petal Number
5
Placentation Type
Axillary
Soil Composition
Mineral
Soil pH
Acidic; Alkaline; Circumneutral
Stamen Number
1; 2
Unconsolidated Rock
Yes
Unconsolidated Size Class
Clay; Silt
Woody Herbaceous
Herbaceous
View details of Herbarium specimens
** Not applicable or data not available.
Classification
Lamiales
Lycopus
Lycopus americanus Muhl. ex W. P. C. Barton - American Water Horehound
Species Distribution Map

This species has been reported in the counties highlighted in the interactive distribution map below. Click on a county to display its name.

Click the question mark icon () to view additional information about the ecoregions shown. In the map legend, there are links to toggle the visibility of the ecoregions and/or their labels. In addition, clicking on an ecoregion name will highlight that region on the map.

Ecoregions
  • Southeastern Plains
    • Blackland Prarie
  • Blue Ridge Mountains
  • Ridge and Valley
  • Cumberland Plateau
  • Cumberland Mountains
  • Allegheny Plateau
  • Interior Plateau
    • Bluegrass Region
    • Nashville Basin
    • Pennyroyal Karst Plain
    • Western Highland Rim
    • Eastern Highland Rim
  • Interior River Valleys and Hills
    • Shawnee / Caseyville Hills
  • Mississippi Alluvial Plain
  • Mississippi Valley Loess Plains
Synonyms
Specimens and Distribution

Click on an Accession Number to view additional details about the specimen.

Range of years during which specimens were collected:

Plant Photos
Lycopus americanus - 2
Lycopus americanus - Joey Shaw View Full Size
Lycopus americanus - 19
Lycopus americanus - Theo Witsell View Full Size
Lycopus americanus - 19
Lycopus americanus - Theo Witsell View Full Size
Lycopus americanus - 19
Lycopus americanus - Theo Witsell View Full Size
Lycopus americanus - 19
Lycopus americanus - Theo Witsell View Full Size