View source for Polytrichum swartzii

{{Treatment/ID
|accepted_name=Polytrichum swartzii
|accepted_authority=C. J. Hartman
|publications={{Treatment/Publication
|title=Handb. Skand. Fl. ed.
|place=5, 361. 1849,
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Polytrichum commune var. swartzii
|authority=(C. J. Hartman) Nyholm
}}{{Treatment/ID/Synonym
|name=Polytrichum algidum
|authority=I. Hagen
}}{{Treatment/ID/Synonym
|name=Polytrichum inconstans
|authority=unknown
}}
|hierarchy=Polytrichaceae;Polytrichum;Polytrichum swartzii
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Polytrichaceae]]</div><div class="higher-taxon"><small>genus</small>[[Polytrichum]]</div><div class="higher-taxon"><small>species</small>[[Polytrichum swartzii]]</div></div>
|volume=Volume 27
|mention_page=page 134
|treatment_page=page 137
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>often rather soft and flexuose, green to blackish when old. <b>Stems</b> 2–9 cm, simple, erect, in proximal part moderately to densely brownish tomentose. <b>Leaves</b> 3–8 mm, loosely imbricate, appressed to erect-spreading and flexuose when dry, patent to widely spreading and weakly recurved when moist; sheath rectangular, scarcely narrowed to the blade; blade lanceolate to linear-lanceolate, often caducous at the junction of sheath and blade, the apex subulate, weakly channeled; marginal lamina 6–9 cells wide, distantly toothed to subentire; costa excurrent as short brown entire to serrulate tip, smooth abaxially or with a few teeth near apex; lamellae in profile entire to shallowly crenulate, 5–10 cells high, the marginal cells in section usually somewhat broadened, flat-topped or shallowly grooved, single or geminate, thin-walled, smooth, the marginal cells of lateral lamellae asymmetric; median sheath cells 75–110 × 2–12 µm, linear; cells of marginal lamina 9–15 µm, quadrate, thin- to firm-walled; perichaetial leaves with long sheathing bases and short subulate blade. <b>Seta</b> 2.5–5 cm, reddish brown. <b>Capsule</b> 2.5–3 cm, ± cubic, sharply 4–angled, suberect when mature, becoming horizontal when old; peristome teeth 64, 160–210 µm, obtuse, the basal portion 60–75 µm. <b>Spores</b> 12–15 µm.</span><!--

-->{{Treatment/Body
|habitat=Very wet and regularly flooded situations, sedge meadows, wet tundra and lake shores (D. G. Long 1985)
|distribution=Greenland;Nfld. and Labr. (Labr.);N.W.T.;Nunavut;Yukon;Alaska;Europe (Scandinavia);n;e Asia;Atlantic Islands (Iceland).
|discussion=<p>Polytrichum swartzii is a northern species with distantly toothed to subentire leaves, differing chiefly by the rounded-quadrate, flat-topped (not retuse or grooved) and scarcely-thickened marginal cells of the lamellae. The capsules are shortly cubic. In Nunavut, it is known from Baffin and Devon islands.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Polytrichum swartzii
|author=
|authority=C. J. Hartman
|rank=species
|parent rank=genus
|synonyms=Polytrichum commune var. swartzii;Polytrichum algidum;Polytrichum inconstans
|basionyms=
|family=Polytrichaceae
|habitat=Very wet and regularly flooded situations, sedge meadows, wet tundra and lake shores (D. G. Long 1985)
|distribution=Greenland;Nfld. and Labr. (Labr.);N.W.T.;Nunavut;Yukon;Alaska;Europe (Scandinavia);n;e Asia;Atlantic Islands (Iceland).
|reference=None
|publication title=Handb. Skand. Fl. ed.
|publication year=
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V27/V27_168.xml
|genus=Polytrichum
|species=Polytrichum swartzii
}}<!--

-->[[Category:Treatment]][[Category:Polytrichum]]