Jepson eFlora: Taxon page
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Salvinia molesta

Higher Taxonomy
Family: SalviniaceaeView Description 

Habit: Free-floating aquatic; roots 0. Stem: horizontal. Leaf: in groups of 3 along stem, each group of 2 floating leaves, 1 submersed; floating leaves simple, +- sessile or short-petioled, generally ovate to cordate, entire, notched at tip or not, green, hairy, hairs water-repellent on upper face; submersed leaf dissected, root-like, generally petioled, +- white, hairy. Sporangia: in +- spheric, indehiscent cases of 2 kinds, submersed, on axes in chain-like arrangements or on leaves. Sporangium Case: few to many; sporangia many per case; spores 32 or 64 per sporangium, spheric, in hard mass. Male Sporangium Case: few to many; sporangia many per case; spores 32 or 64 per sporangium, spheric, in hard mass. Female Sporangium Case: 1--few, basal; sporangia few per case; spore 1 per sporangium, spheric.
Genera In Family: 1 genus, +- 10 species: +- worldwide, generally tropics. Note: Closest relatives of Azollaceae. In California, probably all are escapes from cultivation, aquaria, reproducing vegetatively (fertile material documented in California only for Salvinia minima).
eFlora Treatment Author: Bruce G. Baldwin
Scientific Editor: Thomas J. Rosatti.
Genus: SalviniaView DescriptionDichotomous Key

Etymology: (A.M. Salvini, Italian botanist, 1633--1729)

Salvinia molesta D.S. Mitch.
Leaf: floating blade generally 15--25 mm, +- round, length < 1.5 × width, papillae on upper face <= 1 mm, hairs on papillae joined into dark knot at tips.
Ecology: River channels, backwaters, floodplain ponds; Elevation: generally < 100 m. Bioregional Distribution: SCo, DSon (Colorado River); Distribution Outside California: +- worldwide in tropics; native to Brazil.
Unabridged Note: Possibly of recent hybrid origin.
eFlora Treatment Author: Bruce G. Baldwin
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Previous taxon: Salvinia minima
Next taxon: Salvinia oblongifolia

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Citation for this treatment: Bruce G. Baldwin 2017. Salvinia molesta, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on April 28, 2017.

Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora,, accessed on April 28, 2017.

Geographic subdivisions for Salvinia molesta:
SCo, DSon (Colorado River);
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.
Blue line denotes eFlora flowering time.