Overview

Distribution

National Distribution

Canada

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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Global Range: Potamogeton vaginatus occurs primarily in northwestern North America and in Eurasia. In North America, it ranges from Quebec and Ontario west to British Columbia and north to Alaska; and from Canada south to Oregon, Utah, Colorado, and South Dakota.

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Alta., B.C., Man., N.W.T., Nunavut, Ont., Que., Sask., Yukon; Alaska, Colo., Idaho, Minn., Mont., N.Dak., Oreg., S.Dak., Utah, Wash., Wis., Wyo.; Eurasia.
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Physical Description

Morphology

Description

Stems freely branching proximally to distally, terete, 20--50(--70) cm. Leaves: length and width of those on main stem only slightly larger than those on branches; stipules with stipular sheaths inflated 3--5 times stem thickness, 2--9 cm, ligule absent, obscure, or to 0.2 mm; blade narrowly filiform to linear, 1--10(--15) cm ´ 0.2--2.9 mm, apex rounded, obtuse, or slightly notched; veins 1(--3). Inflorescences: peduncles terminal, erect, slender, 3--15 cm; spikes moniliform, 10--80 mm; verticels 3--12. Fruits brown, obliquely obovoid, 3--3.8 mm ´ 2--2.9 mm; beak inconspicuous. 2n = 78.
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Diagnostic Description

Synonym

Potamogeton vaginatus Turczaninow, Bull. Soc. Imp. Naturalistes Moscou 27(2): 66--67. 1854
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Ecology

Habitat

Comments: Potamogeton vaginatus occurs primarily in alkaline waters in shallow-to-deep ponds, lakes, or streams. It tends to occur in areas of low wave action up to a depth of approximately 2 m.

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Deep lakes and ponds; 0--2300m.
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Population Biology

Number of Occurrences

Note: For many non-migratory species, occurrences are roughly equivalent to populations.

Estimated Number of Occurrences: 81 to >300

Comments: Collected at close to 100 sites in North America. This species also occurs in Eurasia.

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Life History and Behavior

Cyclicity

Flowering/Fruiting

Flowering late summer--fall.
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Stuckenia vaginata

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


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Statistics of barcoding coverage: Stuckenia vaginata

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 1
Specimens with Barcodes: 6
Species With Barcodes: 1
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Conservation

Conservation Status

National NatureServe Conservation Status

Canada

Rounded National Status Rank: N5 - Secure

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: G5 - Secure

Reasons: Potamogeton vaginatus occurs across a broad range that includes Eurasia as well as North America. It is somewhat less common than previously thought because all supposed populations of this species in the northeastern U.S. have been determined to be P. filiformis. P. vaginatus is very common in Saskatchewan, the Yukon, and the Northwest Territories.

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Global Short Term Trend: Relatively stable to decline of 30%

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Threats

Comments: P. vaginatus is threatened by water pollution by mining and agriculture, eutrophication of ponds and lakes, lakeside development, invasion of habitat by exotic plant species, and changes in hydrology.

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Management

Biological Research Needs: Perform taxonomic work and chemical analyses to resolve taxonomic discrepancies within the pondweed family.

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Wikipedia

Stuckenia vaginata

Stuckenia vaginata (syn. Potamogeton vaginatus),[1] commonly called sheathed pondweed, big sheathed pondweed or large-sheathed pondweed is a water plant species[2] that grows in fresh and brackish water in Europe,[3] Northern Asia (excluding China) and North America.[4] Sheathed pondweed is rare, but is not in the 2012 IUCN Red List.

Stuckenia vaginata is a fully submerged aquatic plant and does not have any floating or emerged leaves.

The flowers are wind pollinated and the seeds float. Tubers that are rich in starch are formed on the rhizomes. Reproduction can either be vegetative with tubers and plant fragments or sexual with seeds.

Description[edit]

The main difference between Stuckenia and Potamogeton is that the stipule joins the leaf base; when it is pulled the sheath and stipule comes away, similar to a grass sheath and ligule. Stuckenia vaginata is 1–4 metres long and has longer stipule sheaths than e.g. Stuckenia pecinata and Stuckenia filiformis. Similar to them, it has long narrow linear leaves.

References[edit]

  1. ^ Lindqvist, Charlotte; De Laet, Jan; Haynes, Robert R.; Aagesen, Lone; Keener, Brian R.; Albert, Victor A. (2006). "Molecular phylogenetics of an aquatic plant lineage, Potamogetonaceae". Cladistics 22 (6): 568–588. doi:10.1111/j.1096-0031.2006.00124.x. ISSN 0748-3007. 
  2. ^ Kaplan, Zdeněk (2008). "A Taxonomic Revision of Stuckenia (Potamogetonaceae) in Asia, with Notes on the Diversity and Variation of the Genus on a Worldwide Scale". Folia Geobotanica 43 (2): 159–234. doi:10.1007/s12224-008-9010-0. ISSN 1211-9520. 
  3. ^ Durnikin, D.A.; A.E. Zinovyeva (2013). "Singularity of Flora in Southern Water Basin of OB-Irtysh Interfluve of Western Siberia". World Applied Sciences Journal 22 (3): 337–341. doi:10.5829/idosi.wasj.2013.22.03.2676. Retrieved 24 April 2013. 
  4. ^ "Stuckenia vaginata". Species details. ITIS. Retrieved 24 April 2013. 
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Notes

Comments

One hybrid, P. pectinatus ´ P. vaginatus (= P. ´ bottnicus Hagström), with this species as a putative parent has been described under the genus Potamogeton.
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Names and Taxonomy

Taxonomy

Comments: Recognized in Kartesz (1999) and FNA (2000, vol. 22) as Stuckenia vaginata.

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