Difference between revisions of "Stuckenia filiformis subsp. occidentalis"

(J. W. Robbins) R. R. Haynes

Novon 8: 241. 1998.

Common names: Potamot filiforme occidental
Basionym: Potamogeton marinus var. occidentalis J. W. Robbins
Treatment appears in FNA Volume 22.
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|elevation=0–2195 m
 
|elevation=0–2195 m
 
|distribution=Alta.;B.C.;Man.;N.B.;Nfld. and Labr.;N.W.T.;N.S.;Nunavut;Ont.;P.E.I.;Que.;Sask.;Yukon;Alaska;Colo.;Idaho;Iowa;Maine;Mich.;Minn.;Mont.;Nev.;N.H.;N.Mex.;N.Y.;N.Dak.;Oreg.;Utah;Vt.;Wash.;Wis.;Wyo.
 
|distribution=Alta.;B.C.;Man.;N.B.;Nfld. and Labr.;N.W.T.;N.S.;Nunavut;Ont.;P.E.I.;Que.;Sask.;Yukon;Alaska;Colo.;Idaho;Iowa;Maine;Mich.;Minn.;Mont.;Nev.;N.H.;N.Mex.;N.Y.;N.Dak.;Oreg.;Utah;Vt.;Wash.;Wis.;Wyo.
|discussion=<p>In the Great Lakes region, the name Potamogeton [Stuckenia] vaginatus has often been misapplied to this taxon. The distribution of S. vaginatus is further to the north and west than the Great Lakes region, however. Stuckenia filiformis subsp. occidentaliis rarely produces fruit in the eastern portion of its range, while to the north and west it commonly fruits. This subspecies is very similar to Potamogeton rostratus Hagstr&ouml;m ([the combination does not exist within the genus Stuckenia)] of Asia and may prove to be the same taxon. Both grow in similar habitats. The proximal stipules are much enlarged and inflated, and the leaves are generally wider than the other subspecies.</p>
+
|discussion=<p>In the Great Lakes region, the name <i>Potamogeton</i> [<i>Stuckenia</i>] vaginatus has often been misapplied to this taxon. The distribution of S. vaginatus is further to the north and west than the Great Lakes region, however. <i>Stuckenia filiformis</i> subsp. occidentaliis rarely produces fruit in the eastern portion of its range, while to the north and west it commonly fruits. This subspecies is very similar to <i>Potamogeton</i> rostratus Hagstr&ouml;m ([the combination does not exist within the genus <i>Stuckenia</i>)] of Asia and may prove to be the same taxon. Both grow in similar habitats. The proximal stipules are much enlarged and inflated, and the leaves are generally wider than the other subspecies.</p>
 
|tables=
 
|tables=
 
|references=
 
|references=
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|publication year=1998
 
|publication year=1998
 
|special status=
 
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V22/V22_273.xml
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|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V22/V22_273.xml
 
|genus=Stuckenia
 
|genus=Stuckenia
 
|species=Stuckenia filiformis
 
|species=Stuckenia filiformis

Revision as of 15:57, 18 September 2019

Stems 20–100 cm. Leaves: stipules disintegrating with age, those on proximal portion of stem inflated; blade inflated; 0.2–5 mm wide. Inflorescences: peduncles with flower and/or fruits adjacent or separated by less than 2 cm. Fruits often absent.


Phenology: Flowering spring–early fall.
Habitat: Calcareous waters, mainly in cold, slow- to fast-flowing streams and rivers, occasionally in standing waters of ponds and lakes
Elevation: 0–2195 m

Distribution

V22 273-distribution-map.jpg

Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., N.S., Nunavut, Ont., P.E.I., Que., Sask., Yukon, Alaska, Colo., Idaho, Iowa, Maine, Mich., Minn., Mont., Nev., N.H., N.Mex., N.Y., N.Dak., Oreg., Utah, Vt., Wash., Wis., Wyo.

Discussion

In the Great Lakes region, the name Potamogeton [Stuckenia] vaginatus has often been misapplied to this taxon. The distribution of S. vaginatus is further to the north and west than the Great Lakes region, however. Stuckenia filiformis subsp. occidentaliis rarely produces fruit in the eastern portion of its range, while to the north and west it commonly fruits. This subspecies is very similar to Potamogeton rostratus Hagström ([the combination does not exist within the genus Stuckenia)] of Asia and may prove to be the same taxon. Both grow in similar habitats. The proximal stipules are much enlarged and inflated, and the leaves are generally wider than the other subspecies.

Selected References

None.

Lower Taxa

None.
Robert R. Haynes +  and C. Barre Hellquist +
(J. W. Robbins) R. R. Haynes +
Potamogeton marinus var. occidentalis +
Potamot filiforme occidental +
Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. +, N.W.T. +, N.S. +, Nunavut +, Ont. +, P.E.I. +, Que. +, Sask. +, Yukon +, Alaska +, Colo. +, Idaho +, Iowa +, Maine +, Mich. +, Minn. +, Mont. +, Nev. +, N.H. +, N.Mex. +, N.Y. +, N.Dak. +, Oreg. +, Utah +, Vt. +, Wash. +, Wis. +  and Wyo. +
0–2195 m +
Calcareous waters, mainly in cold, slow- to fast-flowing streams and rivers, occasionally in standing waters of ponds and lakes +
Flowering spring–early fall. +
Coleogeton +
Stuckenia filiformis subsp. occidentalis +
Stuckenia filiformis +
subspecies +