Lycopus americanus Muhl. ex W.P.C. Barton
cut-leaved water horehound (American water horehound)
Lamiaceae (Mint family)
Introduction to Vascular Plants
cut-leaved water horehound (American water horehound)
Lamiaceae (Mint family)
Introduction to Vascular Plants
Species Information
General:
Perennial herb from rhizome, without tubers; stems erect, 20-80 cm tall, slender, simple or branched, 4-angled, generally glabrous but nodes short-hairy.
Leaves:
Opposite, oblong to lanceolate, 3-8 cm long, 1-3.5 cm wide, tips pointed, bases tapering to a short stalk, margins coarsely, irregularly and deeply toothed or cleft, lower teeth larger; uppermost leaves shallowly toothed to entire.
Flowers:
Inflorescence of many head-like, axillary flower clusters; corollas tubular, 4-lobed, white, 2-3 mm long, about the length of calyces; calyx teeth 5, awl-like, short-awned.
Fruits:
Nutlets, 4 clustered together, 1-1.5 mm long, 0.8-1.2 mm wide, 3-angled, corky-thickened on edges, smooth and broadly rounded at the top.
USDA Species Characteristics
Flower Colour:
White
Blooming Period:
Early Summer
Fruit/Seed characteristics:
Colour: Brown
Present from Summer to Fall
Source: The USDA
Ecology
Ecological Framework for Lycopus americanus
The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)
The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)
| Site Information |
Value / Class |
||
|
Avg |
Min |
Max |
|
| Elevation
(metres) |
1030 | 380 | 1620 |
| Slope
Gradient (%) |
4 | 0 | 28 |
|
Aspect (degrees) |
36 | 28 | 52 |
| Soil
Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric] |
6 | 4 | 8 |
| Modal
Nutrient Regime
Class |
D | ||
| #
of field plots species was recorded in: |
24 | ||
| Modal
BEC Zone Class |
CWH | ||
|
All BEC Zones (# of stations/zone) species was recorded in |
CDF(3), CWH(10), ESSF(1), ICH(2), SBPS(1), SBS(2), SWB(1) | ||
|
Source:
Klinkenberg 2013
|
|||
Habitat and Range
Lake and stream margins and moist forest edges in the lowland and montane zones; frequent in C and S BC; E to NF and S to CA and FL.Status Information
Synonyms
Synonyms and Alternate Names:
Lycopus americanus var. longii Benner
Lycopus americanus var. scabrifolius Fern.
Lycopus sinuatus Ell.