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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 July 30, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on July 30, 2016.


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