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Overview

Distribution

Range Description

The species is a predominantly a temperate Old World species, but occurs from Macaronesia and North Africa north to Scandinavia, east through Siberia, the Caucasus, Turkey, Iraq, Iran, Palestine, Afghanistan, Pakistan, (Dandy 1971, Ghafoor accessed through www.efloras.org), the western Himalayas (The Board of Trustees of the Royal Botanic Gardens, Kew 2010) to China (Wang Quingfeng in prep.). It is naturalised in New Zealand (Allan Herbarium 2000), the west coast of North America (Oregon, California) and Chile (Haynes and Barre-Hellquist 2000).

It is widespread in north and central Europe, but most abundant in the Mediterranean basin. It has an interesting relationship with A. plantago-aquatica with which its range overlaps throughout much of Europe, but the latter species is increasingly relatively abundant in the north, whilst A. lanceolatum more or less replaces A. plantago-aquatica in the south.
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National Distribution

Canada

Origin: Exotic

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

United States

Origin: Exotic

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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introduced; Calif., Oreg.
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Distribution: West Pakistan, Central and South-western Asia, north west Africa and Europe.
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Physical Description

Morphology

Description

An erect, glabrous, emergent herb. Leaves broadly linear-lanceolate, 6-7.5 cm long, 1-1.4 cm broad, somewhat glaucous, cuneately tapering into as long as or much longer petiole, acute. Panicle of (3-) 4-6 ascending branches and pedicels per verticil, 30-40 cm long. Flowers purplish-pink, c. l.2 cm across; pedicels slender, 1.5-l.8 (-2.2) cm long; bracts triangular-ovate, 5-10 mm long, acuminate. Sepals triangular-ovate, c. 3 mm long, c. 2 mm broad, with membranous margins, acute. Petals membranous, oblong, 5-6 mm long, 2-2.5 mm broad, acute. Stamens with c. 2 mm long filaments; anthers elliptic-oblong. Ovaries c. 1 mm long, glabrous; styles longer than the ovaries, erect. Achenes obovate, c. 2-2.5 mm long, pale brown, with 1 or 2 furrows on back. Seeds oblong, c. 1.5 mm long, reddish brown.
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Description

Herbs, to 70 cm. Leaves emersed, petiolate; blade lanceolate, 6--23 ´ 1--4.5 cm. Inflorescences to 70 cm. Flowers chasmogamous; sepals 1.6--3 mm; petals purplish pink, 4.4--6.5 mm, margins ± erose, apex acuminate; anthers ellipsoid, 0.6--1.1 mm; style ± curved, 0.4--0.6 mm, equaling ovary length. Fruiting heads 4--8 mm diam; achenes obovoid, 2--2.9 mm, with 1--2 abaxial grooves, beak erect. 2n = 26, 28 (Eurasian material).
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
A. lanceolatum occurs in a wide variety of habitats, particularly in southern Europe, such as marshes, canals, ditches and on the margins of ponds and lakes. It is know also as a weed in paddy fields in Iran.

Systems
  • Terrestrial
  • Freshwater
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Streams and marshes; 0--500m.
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Associations

Foodplant / spot causer
colony of Spermosporina anamorph of Spermosporina alismatis causes spots on yellowing leaf of Alisma lanceolatum

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Life History and Behavior

Cyclicity

Flowering/Fruiting

Flowering and fruiting summer--fall.
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Flower/Fruit

Fl. Per.: June-September.
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Alisma lanceolatum

The following is a representative barcode sequence, the centroid of all available sequences for this species.


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Statistics of barcoding coverage: Alisma lanceolatum

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 5
Specimens with Barcodes: 5
Species With Barcodes: 1
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2014

Assessor/s
Akhani, H. & Zehzad, B.

Reviewer/s
Lansdown, R.V.

Contributor/s

Justification
This species is classed as Least Concern as it is widespread with stable populations and does not face any major threats.
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National NatureServe Conservation Status

Canada

Rounded National Status Rank: NNA - Not Applicable

United States

Rounded National Status Rank: NNA - Not Applicable

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NatureServe Conservation Status

Rounded Global Status Rank: G4 - Apparently Secure

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Population

Population
There may be local declines, for example in Estonia and Switzerland, but most populations, particularly in southern Europe and the East Mediterranean area, appear to be stable .

Population Trend
Stable
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Threats

Major Threats

There are no known significant past, ongoing or future threats to this species.

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Management

Conservation Actions

Conservation Actions
Alisma lanceolatum is classed as Extinct in Estonia and Vulnerable in Switzerland. No conservation measures are in place for this species. As a rather common species in the East Mediterranean, it seems that no particular conservation measure are required in this part of its range.
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Wikipedia

Alisma lanceolatum

Alisma lanceolatum is a species of aquatic plant in the water plantain family known by the common names lanceleaf water plantain and narrow-leaved water plantain. It is widespread across Europe, North Africa and temperate Asia. It is naturalized in Australia, New Zealand, Oregon, California and British Columbia. It is considered a noxious weed in some places.[2][3][4][5]

This species is a weed of rice fields in many areas, including New South Wales and California.

In England and Wales it is occasionally locally found, in Ireland it is rare, and Scotland it is very rare.

It is found in mud and in fresh waters.

Description[edit]

Alisma lanceolatum, Botanical gadren UK, Prague
Part of an inflorescence and single blossom

This is a perennial herb growing from a caudex in the water or mud. It produces lance-shaped leaves 12 to 20 centimeters long and 4 wide on long petioles; leaves which remain submerged in water are smaller and less prominently veined. The inflorescence is mostly erect and up to half a meter tall.

It is a wide array of small pink-petalled flowers, which open in the morning, from June until August. The fruit is a tiny achene up to 2 or 3 millimeters long clustered into an aggregate fruit of about 20 units.

Similar Species[edit]

Water plantain Alisma plantago-aquatica leaf tips are acute and not tapered to a stalk.[6]

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