Jepson eFlora: Taxon page
Vascular Plants of California
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Ottelia alismoides

Higher Taxonomy
Family: HydrocharitaceaeView DescriptionDichotomous Key
Habit: Annual, perennial herb, aquatic, freshwater or marine, glabrous or hairy; monoecious, dioecious, or flowers bisexual. Leaf: basal, alternate, opposite, or whorled, generally sessile, generally +- sheathing at base. Inflorescence: axillary, terminal, or scapose, cyme or flowers 1, subtended by +- sheathing, entire or lobed bract; staminate flowers sometimes deciduous, free-floating. Flower: generally radial; perianth 0 or tube 0 or elongate, peduncle-like in flower; sepals (0)3(4), green; petals (0)3(4), white or not; stamens (0)2--many, generally in 1+ series; ovary inferior, chamber 1 or falsely 6--9, placentas parietal, ovules 1--many, style lobes generally 3, linear, lobed or notched. Fruit: achene or berry-like and dehiscing irregularly, linear to spheric, submersed.
Genera In Family: +- 17 genera, +- 130 species: worldwide; some cultivated for aquaria, others noxious weeds. Note: Ottelia alismoides (L.) Pers. is a possibly extirpated alien.
eFlora Treatment Author: Robert F. Thorne, C. Barre Hellquist & Robert R. Haynes
Scientific Editor: Thomas J. Rosatti.
Genus: OtteliaView Description 

Habit: Annual, perennial herb, submersed to emergent, rooted in mud. Stem: generally short, erect. Leaf: basal, petioled, alternate. Inflorescence: terminal; flowers 1, emergent; bract +- enclosing flower, ribbed or winged, persistent in fruit. Flower: bisexual, emergent, fragrant; sepals 3; petals 3; stamens 3, staminodes >= 6; ovary oblong, stigmas 6--9, linear, deeply 2-lobed to me. Fruit: 15--40 mm, oblong, irregularly dehiscent, generally ribbed. Seed: several.
Species In Genus: +- 21 species: tropics, warm temperate Eurasia. Etymology: (Malay: to stick to, from leaves)
Ottelia alismoides (L.) Pers.
Leaf: 10--25 cm, entire or crisped, veins parallel, curved; lower, submersed blades elliptic to ovate, upper, floating or emergent blades ovate to cordate or reniform. Flower: sepals +- 1.5 cm, 4 mm wide; petals 2--3 cm, obovate, white to +- pink; anthers bright yellow. Fruit: < 4 cm, oblong; tip beaked.
Ecology: Ditches, rice-fields; Elevation: +- 50 m. Bioregional Distribution: e ScV (Butte Co.); Distribution Outside California: Louisiana; native to Africa, India, southwestern Pacific, tropical Asia, Australia. Flowering Time: Summer--fall Note: Potentially noxious weed; reportedly extirpated in California.
Jepson eFlora Author: Robert F. Thorne, C. Barre Hellquist & Robert R. Haynes
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Citation for this treatment: Robert F. Thorne, C. Barre Hellquist & Robert R. Haynes 2012, Ottelia alismoides, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on December 12, 2018.

Citation for the whole project: Jepson Flora Project (eds.) 2018, Jepson eFlora,, accessed on December 12, 2018.

No expert verified images found for Ottelia alismoides.

Geographic subdivisions for Ottelia alismoides:
e ScV (Butte Co.);
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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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.