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Vascular Plants of California
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Nymphaea mexicana

Higher Taxonomy
Family: NymphaeaceaeView DescriptionDichotomous Key
Habit: Perennial herb, aquatic, rhizomed, stoloned or not; herbage with air chambers. Leaf: alternate, from rhizome; blades floating, submersed, or +- emergent, << petiole, +- deeply notched at base into 2 lobes [peltate]. Inflorescence: 1-flowered, axillary; peduncle long. Flower: bisexual, generally on or above water; sepals 4--14, free, petal-like or not; petals many [(0)], stamen-like or not; stamens many, attached to receptacle or ovary side, filaments generally wide; ovary compound, superior to inferior, chambers 3--many, many-ovuled, stigmas in radiating lines on stigmatic disk. Fruit: berry-like, +- dehiscent or not, spongy.
Genera In Family: 5 genera, +- 70 species: +- worldwide.
eFlora Treatment Author: John H. Wiersema
Scientific Editor: Thomas J. Rosatti.
Genus: NymphaeaView DescriptionDichotomous Key

Habit: Rhizomes prostrate to erect, branched or not, stoloned or not. Leaf: blade generally floating, elliptic to round, basal lobes generally +- acute. Flower: sepals < petals, +- green; petals 8--many, white, +- red, [blue], or yellow; stamens many, attached to ovary side, erect to ascending at dehiscence, outer filaments flat, petal-like or not, inner linear; ovary < stamens. Seed: +- spheric to elliptic, arilled.
Species In Genus: +- 50 species: +- worldwide. Etymology: (Greek: water nymph) Note: Plants of both California taxa problematic weeds in waterways.
Reference: Woods et al. 2005 Syst Bot 30:471--480
Nymphaea mexicana Zucc.
Habit: Rhizomes erect, unbranched. Leaf: blade 7--14(18) cm wide, ovate to +- round. Flower: 6--11 cm wide, floating or emergent; sepals, petals lanceolate to narrow-elliptic; petals 12--30; outer stamens generally 2--2.5 cm, inner anthers 4--6 mm; styles 7--9. Fruit: 2--2.5 cm, ovoid. Seed: 4--5 mm. Chromosomes: 2n=56.
Ecology: Lakes, ponds, slow streams; Elevation: < 100 m. Bioregional Distribution: SnJV; Distribution Outside California: native to southeastern United States, Mexico. Flowering Time: Apr--Jul Note: California plants referred to this sp. may be instead belong to Nymphaea ×thiona D.B. Ward, a natural hybrid between Nymphaea mexicana and Nymphaea odorata.
Jepson eFlora Author: John H. Wiersema
Reference: Woods et al. 2005 Syst Bot 30:471--480
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Citation for this treatment: John H. Wiersema 2012, Nymphaea mexicana, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on December 15, 2018.

Citation for the whole project: Jepson Flora Project (eds.) 2018, Jepson eFlora,, accessed on December 15, 2018.

No expert verified images found for Nymphaea mexicana.

Geographic subdivisions for Nymphaea mexicana:
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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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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.