Jepson Herbarium
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Perennial [ 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.
5 genera, ± 70 species: worldwide. —Scientific Editor: Thomas J. Rosatti.
Unabridged references: [Kadereit, J. W. 2006 [2007]. Asterales: Introduction and Conspectus. Pp. 1–6, in Kadereit, J. W. & Jeffrey, C. (eds.), The Families and Genera of Vascular Plants. Volume VIII. Flowering Plants. Eudicots. Asterales. Springer, Berlin; Tippery, N. P. [et al. 2006], Les, D. H., Padgett, D., & Surrey, J. 2006. Clades and grades: An evaluation of generic circumscriptions in Menyanthaceae Dumort. (Asterales). Pp. 262–263, in Botany 2006 - Looking to the Future - Conserving the Past. (Abstracts: Botanical Society of America, etc.)]

Key to Menyanthaceae

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

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.
2n=54,108. Ponds, bogs, swamps, wet meadows, seeps, margins of shallow lakes; 900–3200 m. c North Coast, Klamath Ranges, Cascade Range, Sierra Nevada (except Tehachapi Mountain Area), n Central Coast;

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Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].

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Bioregions in which taxon occurs	Red area (if present) is the part of the bioregion lying between the upper and lower elevation limits of the taxon; 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.
Chart based on elevation range in Manual and elevations and coordinates of CCH records. Data provided by the participants of the Consortium of California Herbaria. Note: About half of the CCH records include both elevation and coordinates.	Map made in collaboration with Scott Loarie. Data provided by the participants of the Consortium of California Herbaria. View all CCH records   CCH collections by month Duplicates counted once; synonyms included. Species do not include records of infraspecific taxa. Blue line denotes Manual flowering time.