Jepson eFlora: Taxon page
Vascular Plants of California
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Mentha aquatica
WATERMINT


Higher Taxonomy
Family: Lamiaceae (Labiatae)View DescriptionDichotomous Key
Common Name: MINT FAMILY
Habit: Annual to shrub [tree, vine], glabrous to hairy, generally aromatic. Stem: generally erect, generally 4-angled. Leaf: generally simple to deeply lobed, generally opposite, generally gland-dotted. Inflorescence: generally cymes, generally many in dense axillary clusters surrounding stem, generally separated by evident internodes or collectively crowded, spike- or panicle-like, occasionally head-like or raceme, subtended by leaves or bracts; flowers sessile or pedicelled. Flower: generally bisexual; calyx generally 5-lobed, radial to bilateral; corolla generally bilateral, 1--2-lipped, upper lip entire or 2-lobed, +- flat to hood-like, occasionally 0, lower lip generally 3-lobed; stamens generally 4, epipetalous, generally exserted, paired, pairs generally unequal, occasionally 2, staminodes 2 or 0; ovary superior, generally 4-lobed to base chambers 2, ovules 2 per chamber, style 1, generally arising from center at junction of lobes, stigmas generally 2. Fruit: generally 4 nutlets, generally ovoid to oblong, smooth.
Genera In Family: +- 230 genera, 7200 species: worldwide. Many cultivated for herbs, oils (Lavandula, lavender; Mentha, mint; Rosmarinus, rosemary; Thymus, thyme), some cultivated as ornamental (in California Cedronella, Leonotis, Monarda, Phlomis). Note: Moluccella laevis L., shell flower, historical waif in California. Satureja calamintha (L.) Scheele subsp. ascendens (Jordan) Briq. reported as alien but not naturalized. Salazaria moved to Scutellaria; California Hyptis moved to Condea, California Satureja moved to Clinopodium.
eFlora Treatment Author: Dieter H. Wilken & Margriet Wetherwax, family description, key to genera, except as noted
Scientific Editor: Douglas H. Goldman, Bruce G. Baldwin.
Genus: MenthaView DescriptionDichotomous Key


Common Name: MINT
Habit: Perennial herb from rhizomes, glabrous to hairy. Stem: generally ascending to erect, generally branched. Leaf: petioled to sessile; blade elliptic to ovate or lanceolate, toothed to lobed. Inflorescence: head-like in leaf axils or collectively spike- or panicle-like and subtended by bracts. Flower: calyx +- radial, generally 10-veined, lobes 4--5, equal or not; corolla +- 2-lipped, lips generally equal, upper lip notched, lower lip 3-lobed; stamens 4, +- equal, generally exserted, filaments glabrous, anthers segments parallel, distinct. Fruit: nutlets +- ellipsoid, tip rounded.
Species In Genus: 18 species: temperate. North America, Eurasia. Etymology: (Latin: ancient name for mint) Note: Cult for oils, flavoring, herbs. Hybrids in California generally sterile, spreading from rhizomes.
Unabridged Note: Many cultivated and naturalized populations derived from hybridization, generally polyploid, some sterile, reproducing vegetatively.
eFlora Treatment Author: Arthur O. Tucker
Reference: Tucker et al. 1980 Taxon 29:233--255
Mentha aquatica L.
NATURALIZED
Stem: 3--14 dm, glabrous to hairy. Leaf: 2--5(9) cm; petiole 3--8(25) mm; blade generally ovate, generally serrate, base tapered to +- lobed, tip acute. Inflorescence: head-like, clustered at distal 3--5 nodes, subtended by ovate to lance-linear bracts. Flower: calyx 2.5--4 mm, glabrous or lobes ciliate; corolla 3.5--6 mm, white to pink or violet. Chromosomes: 2n=96.
Ecology: Moist places, fields; Elevation: < 950 m. Bioregional Distribution: NCo, KR, NCoRO, SNF, SnJV, CCo, SCoRO, SCo, TR, PR, W&I, DMoj, cultivated elsewhere; Distribution Outside California: to Canada, eastern United States; native to Europe, naturalized from cultivation. Flowering Time: Jul--Oct
Unabridged Synonyms: Mentha citrata Ehrh.
Jepson eFlora Author: Arthur O. Tucker
Reference: Tucker et al. 1980 Taxon 29:233--255
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Citation for this treatment: Arthur O. Tucker 2012, Mentha aquatica, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=33191, accessed on August 18, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on August 18, 2019.

No expert verified images found for Mentha aquatica.



Geographic subdivisions for Mentha aquatica:
NCo, KR, NCoRO, SNF, SnJV, CCo, SCoRO, SCo, TR, PR, W&I, DMoj, cultivated elsewhere
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map of distribution 1
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time.