Jepson eFlora: Taxon page
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Menyanthes trifoliata

Higher Taxonomy
Family: MenyanthaceaeView DescriptionDichotomous Key

Common Name: BUCKBEAN FAMILY
Habit: Perennial herb [annual], +- aquatic, herbage glabrous; rhizomes thick. Leaf: simple or of 3 leaflets, generally alternate; stipules generally 0; petiole bases sheathing. Inflorescence: various. Flower: bisexual [unisexual], radial; sepals 5, united or not; corolla rotate to funnel-shaped, lobes 5, fringed or coarse-hairy marginally or adaxially or not; stamens 5, epipetalous, alternate corolla lobes, anthers sagittate; nectaries generally 5, at ovary base; pistil 1, ovary generally +- superior, chamber 1, stigma 2-lobed. Fruit: capsule [+- fleshy], valves 2--4. Seed: few to many, smooth, shiny.
Genera In Family: 5 genera, +- 70 species: worldwide.
eFlora Treatment Author: Robert F. Thorne, C. Barre Hellquist & William J. Stone
Scientific Editor: Thomas J. Rosatti.
Genus: MenyanthesView Description 

Common Name: BUCKBEAN, BOGBEAN

Species In Genus: 1 sp. Etymology: (Greek: disclosing, flower, from flowers opening in succession in inflorescence)

Menyanthes trifoliata L.
NATIVE
Habit: Rhizome covered with old leaf bases. Stem: prostrate or flower branches ascending. Leaf: basal, alternate, emergent; leaflets 3, 2--12 cm, 1--5 cm wide, oblong-obovate, +- entire; petioles 5--30 cm; stipules as wing-margins of petiole. Inflorescence: raceme; peduncle 20--40 dm; pedicel 5--25 mm. Flower: calyx persistent, tube short-conic, lobes 5, 2--5 mm, oblong; corolla funnel-shaped, white to pink, tube 5--8 mm, lobes 5--8 mm, spreading, generally +- pink at tip, coarse-hairy adaxially; filaments thread-like, anthers sagittate; style persistent. Fruit: 2-valved, +- ellipsoid. Seed: +- elliptic, +- compressed. Chromosomes: 2n=54,108.
Ecology: Ponds, bogs, swamps, wet meadows, seeps, margins of shallow lakes; Elevation: 900--3200 m. Bioregional Distribution: c NCo, KR, CaR, SN (exc Teh), n CCo; Distribution Outside California: to Alaska, Colorado, Michigan, Maine, circumboreal. Flowering Time: May--Aug Note: Leaves sometimes used in beer-making as hops substitute.
eFlora Treatment Author: Robert F. Thorne, C. Barre Hellquist & William J. Stone
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Citation for this treatment: Robert F. Thorne, C. Barre Hellquist & William J. Stone 2016. Menyanthes trifoliata, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=33295, accessed on February 11, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 11, 2016.


Menyanthes trifoliata
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© 2008 George W. Hartwell
Menyanthes trifoliata
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© 2011 Julie Kierstead Nelson
Menyanthes trifoliata
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© 2010 Barry Rice
Menyanthes trifoliata
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© 2005 Steve Matson
Menyanthes trifoliata
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© 2005 Steve Matson
Menyanthes trifoliata
click for enlargement
© 2009 Julie Kierstead Nelson

More photos of Menyanthes trifoliata in CalPhotos


Geographic subdivisions for Menyanthes trifoliata:
c NCo, KR, CaR, SN (exc Teh), n CCo;
Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.