Pacific Island Ecosystems at Risk (PIER)

  [   PIER species lists  ]   [   PIER home  ]

Mentha aquatica
L., Lamiaceae
Click on an image for links to BIGGER PICTURES


Present on Pacific Islands?  yes

Primarily a threat at high elevations?  yes

Other Latin names:  Mentha citrata Ehrh.; Mentha palustris Mill.

Common name(s): [more details]

English: water mint

French: baume d'eau, menthe acuatique

Japanese: mensa akuatika, menta akuatika, numa hakka

Spanish: bergamota, hierba buena, mentha, sándalo de agua

Habit:  aquatic herb

Description:  "Plant subglabrous to pubescent, with strong pleasant (not spearmint-like) scent. Stems erect, to 90cm. Leaves ovate, broadly cuneate to subcordate at base, with rather shallow, rather blunt teeth, petiolate. Upper whorls in axils of small bracts, congested to form rounded head. Calyx tubular, with narrowly triangular to subulate  teeth, 3-4.5mm. Corolla lilac"  (Interactive Flora of NW Europe [website now apparently defunct; see info from WorldCat]).

"Water mint has red-purple, erect stems to 12 inches; the leaves are dark green, broadly elliptic to more or less rectangular, 1-1.75 inches long and 0.8-1.2 inches wide, with an often puckered and crisped surface and serrate margins"  (Staples & Herbst, 2005; p. 358).

Habitat/ecology:  "In Chile this species grows in the following environmental conditions:  Low altitude, interior valleys; coastal mountains, 500-2000 m; coastal areas, 0-500 m. The plant grows in water or it has its roots within a permanent water course, this corresponds to marshes, bogs, water courses, lake and river shores; humid areas, with almost constant rainfall, short dry periods are possible (generally not longer than 1 month). Fully exposed to the sun, level areas or slopes facing north; some shadow, some protection against direct sunlight, some shadow from vegetation, filtering about 20-40% of light"  (Chileflora).

Propagation:  Perhaps by seed.  Spreads aggressively by underground runners (Staples & Herbst, 2005; p. 358).

Native range:  Europe, Africa, western Asia; naturalized elsewhere (GRIN).

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Chile (offshore islands)
Juan Fernández Islands
Isla Más a Tierra (Robinson Crusoe Island) introduced
invasive
Atkinson, Rachel/Sawyer, John (2011)
Chile (offshore islands)
Juan Fernández Islands
Isla Más a Tierra (Robinson Crusoe Island) introduced
invasive
Danton, Philippe/Perrier, Christophe/Martinez Reyes, Guido (2006) (p. 555)
State of Hawaii
Hawaiian Islands
O‘ahu Island   Bishop Museum (U.S.A. Hawaii. Honolulu.) (1991) (voucher ID: BISH 603017)
Taxon name on voucher: Mentha aquatica L.
Pacific Rim
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Canada (British Colombia)
Province of British Columbia
Canada (British Columbia) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
Chile (continental)
Chile
Chile (Republic of) introduced
Belov, Michail (2013)
China
China
China (People's Republic of) introduced
cultivated
Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
As Mentha citrata Ehrh. [= Mentha aquatica var. citrata]. Beijing Shi, Hangzhou Shi, Nanjing Shi, and other cities.
Guatemala
Guatemala
Guatemala (Republic of) introduced
cultivated
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Japan
Japan
Japan (country) introduced
Mito, Toshikazu/Uesugi, Tetsuro (2004) (p. 188)
Mexico
Mexico
Mexico (United Mexican States) introduced
cultivated
U.S. Dept. Agr., Agr. Res. Serv. (2013)
New Zealand
New Zealand
New Zealand (country) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
United States (west coast)
United States (west coast states)
USA (Oregon) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
United States (west coast)
United States (west coast states)
USA (California) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
United States (west coast)
United States (west coast states)
USA (Washington) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
Also reported from
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Canada (except British Colombia)
Canada
Canada (country) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
United States (continental except west coast)
United States (other states)
United States (other states) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)


Need more info? Have questions? Comments? Information to contribute? Contact PIER! (pier@hear.org)

  [   PIER species lists  ]   [   PIER home  ]

This page was created on 12 FEB 2011 and was last updated on 9 MAY 2017.