E-Flora BC: Electronic Atlas of the Flora of British Columbia

Lycopus asper Greene
rough water horehound (rough bugleweed)
Lamiaceae (Mint family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #19712)

E-Flora BC Static Map
Distribution of Lycopus asper
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Species Information

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Perennial herb from thick rhizome that is tuber-like near tip; stems erect, 20-80 cm tall, stiff, stout, simple or branched, 4-angled, spreading short-hairy.
Opposite, usually ascending, lanceolate to narrowly elliptic, 2-10 cm long, 0.6-3.5 cm wide, narrowed to a rounded base, usually unstalked, glabrous or fine-hairy, margins coarsely but evenly toothed; uppermost leaves gradually to scarcely reduced.
Inflorescence of many head-like, axillary flower clusters; corollas tubular, 4-lobed, white, 3-5 mm long, slightly surpassing the calyces; calyx teeth 5, awl-like, pointed to short-awned.
Nutlets, 4 clustered together, 1.5-2 mm long, 1.4-1.8 mm wide, 3-angled, corky-thickened on edges, flat and often minutely toothed at the top.

Source: The Illustrated Flora of British Columbia

USDA Species Characteristics

Blooming Period:
Mid Summer
Fruit/Seed characteristics:
Colour: Brown
Present from Summer to Fall
Source:  The USDA

Habitat / Range

Marshes, streams and lake margins in the steppe and montane zones; infrequent in C and S BC east of the Coast-Cascade Mountains; N to AK, E to ON, and S to IA, CO and CA

Source: The Illustrated Flora of British Columbia


Ecological Framework for Lycopus asper

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




Elevation (metres) 485 590 626
Slope Gradient (%) 1 2 5
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
100 143 186
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
5 6 8
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: BG(1), IDF(2), PP(1), SBS(1)


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Lycopus lucidus auct. non Turcz. ex Benth. p.p.
Lycopus lucidus subsp. americanus (A. Gray) Hultén
Lycopus lucidus var. americanus A. Gray

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References