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Alisma lanceolatum

Higher Taxonomy
Family: AlismataceaeView DescriptionDichotomous Key

Common Name: WATER-PLANTAIN FAMILY
Habit: Annual, perennial herb from caudices, corms, stolons, rhizomes, or tubers, aquatic (+- emergent or on mud); roots fibrous, septate or not; monoecious, dioecious, or flowers bisexual. Stem: caudex short. Leaf: basal, simple, palmately veined, floating or not; submersed generally linear to ovate; emergent linear to sagittate. Inflorescence: generally scapose, umbel-, raceme-, or panicle-like; flowers, branches whorled. Flower: radial; sepals 3, generally green, generally persistent; petals 3, generally > sepals, white or pink; stamens 6--many; pistils 6--many, free or +- fused at base. Fruit: achene, generally compressed, beaked.
Genera In Family: +- 12 genera, 75--100 species: especially tropics, subtropics.
eFlora Treatment Author: Charles E. Turner, Robert R. Haynes & C. Barre Hellquist
Scientific Editor: Thomas J. Rosatti.
Genus: AlismaView DescriptionDichotomous Key

Common Name: WATER-PLANTAIN
Habit: Perennial herb; roots not septate; flowers bisexual. Leaf: blade linear to ovate, tapered to base or petioled, base tapered to truncate, rounded, or +- lobed. Inflorescence: peduncle generally smooth; pedicels < 45 mm in fruit. Flower: receptacle +- flat; sepals generally 1--4 mm; petals entire to +- cut, white or pink; stamens generally 6; pistils many, free, in 1 whorl on margin of +- flat receptacle. Fruit: body generally 1.5--3 mm, erect, generally strongly compressed, lateral walls opaque to translucent, abaxially thin-ridged; beak < body, generally lateral.
Species In Genus: +- 9 species: generally northern temperate. Etymology: (Greek: ancient name) Note: North American species need study.

Alisma lanceolatum With.
NATURALIZED
Leaf: 12--40 cm; blade 6--12 cm, 1--3 cm wide, generally lanceolate, base tapered. Inflorescence: generally >> leaves; pedicels generally ascending to erect. Flower: petals +- cut, pink; style +- erect, tip recurved. Fruit: lateral walls generally thin, translucent. Chromosomes: 2n=26,28.
Ecology: Ponds, rice fields, slow streams; Elevation: < 500 m. Bioregional Distribution: NW, n SNF, ScV; Distribution Outside California: Oregon; Chile, Australia; native to Eurasia, northern Africa. Flowering Time: Summer--fall
eFlora Treatment Author: Charles E. Turner, Robert R. Haynes & C. Barre Hellquist
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Previous taxon: Alisma gramineum
Next taxon: Alisma triviale

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Citation for this treatment: Charles E. Turner, Robert R. Haynes & C. Barre Hellquist 2016. Alisma lanceolatum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=12461, accessed on February 14, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 14, 2016.


Geographic subdivisions for Alisma lanceolatum:
NW, n SNF, ScV;
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.