View source for Ptychostomum pallens

{{Treatment/ID
|accepted_name=Ptychostomum pallens
|accepted_authority=(Swartz) J. R. Spence
|publications={{Treatment/Publication
|title=Phytologia
|place=87: 21. 2005
|year=2005
}}
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|basionyms={{Treatment/ID/Basionym
|name=Bryum pallens
|authority=Swartz
|rank=species
|publication_title=Monthly Rev.
|publication_place=34: 538. 1801
}}
|synonyms=
|hierarchy=Bryaceae;Ptychostomum;Ptychostomum subg. Ptychostomum;Ptychostomum pallens
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Bryaceae]]</div><div class="higher-taxon"><small>genus</small>[[Ptychostomum]]</div><div class="higher-taxon"><small>subgenus</small>[[Ptychostomum subg. Ptychostomum]]</div><div class="higher-taxon"><small>species</small>[[Ptychostomum pallens]]</div></div>
|volume=Volume 28
|mention_page=page 168, 173
|treatment_page=page 172
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>in dense or open turfs, pale pink, red, or rarely dull green. <b>Stems</b> 1–4(–6) cm, fertile stems comose, innovations evenly foliate. <b>Leaves</b> pink, red, or rarely green, crowded, contorted to shrunken when dry, ovate to broadly ovate-lanceolate, flat or weakly concave, 1–3.5(–4) mm, often gradually enlarged toward stem apex; base pink or green, somewhat to strongly and narrowly decurrent; margins revolute proximally, plane distally, limbidium strong, in 2 or 3 rows; apex acuminate; costa percurrent to short-excurrent, awn stout; proximal laminal cells short-rectangular, 2–3(–4):1; medial and distal cells 17–24 µm wide, 2–3:1, walls thin, not porose. <b>Specialized</b> asexual reproduction rare, by leaf axil gemmae, brown-red to green, finely papillose. <b>Sexual</b> condition dioicous. <b>Seta</b> red-brown, 2–4(–6) cm, stout, straight to somewhat flexuose. <b>Capsule</b> yellow-brown, elongate-pyriform to clavate, somewhat curved, (3–)4–5 mm, mouth yellow-brown; median exothecial cells short-rectangular to quadrate, 20–40 µm, 1–2:1; operculum conic, apiculate; peristome usually well developed; exostome teeth yellow basally, hyaline distally, lamellae straight, pores absent near base along mid line; endostome not adherent to exostome, basal membrane 1/2 exostome height, segments with ovate perforations, cilia appendiculate to nodose, occasionally short. <b>Spores</b> 16–20(–22) µm, yellow to green.</span><!--

-->{{Treatment/Body
|phenology=Capsules mature Jun–Sep.
|habitat=Wet soil, along streams, wetlands, calcareous
|elevation=low to high elevations (0-3000 m)
|distribution=Greenland;Alta.;B.C.;Man.;N.B.;Nfld. and Labr.;N.W.T.;N.S.;Nunavut;Ont.;Que.;Sask.;Yukon;Alaska;Ariz.;Calif.;Colo.;Idaho;Maine;Mich.;Minn.;Mont.;Nev.;N.Mex.;N.Y.;Oreg.;Utah;Wash.;Wyo.;s South America;Eurasia.
|discussion=<p><i>Ptychostomum pallens</i> is a highly variable arctic-boreal to north-temperate species, related to <i>P. cernuum</i>, <i>P. meesioides</i>, and <i>P. rutilans</i>. The pale pink color is diagnostic but not always present. The species is distinguished from <i>P. rutilans</i> by its much thinner walled non-porose laminal cells and well-developed peristome; from P. meesiodes by its shorter, less arcuate capsule and short exothecial cells; and from <i>P. cernuum</i> by its dioicous sexual condition. The plants have red to red-brown leaf costae.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Ptychostomum pallens
|authority=(Swartz) J. R. Spence
|rank=species
|parent rank=subgenus
|synonyms=
|basionyms=Bryum pallens
|family=Bryaceae
|phenology=Capsules mature Jun–Sep.
|habitat=Wet soil, along streams, wetlands, calcareous
|elevation=low to high elevations (0-3000 m)
|distribution=Greenland;Alta.;B.C.;Man.;N.B.;Nfld. and Labr.;N.W.T.;N.S.;Nunavut;Ont.;Que.;Sask.;Yukon;Alaska;Ariz.;Calif.;Colo.;Idaho;Maine;Mich.;Minn.;Mont.;Nev.;N.Mex.;N.Y.;Oreg.;Utah;Wash.;Wyo.;s South America;Eurasia.
|reference=None
|publication title=Phytologia
|publication year=2005
|special status=Illustrated
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V28/V28_274.xml
|genus=Ptychostomum
|subgenus=Ptychostomum subg. Ptychostomum
|species=Ptychostomum pallens
}}<!--

-->[[Category:Treatment]][[Category:Ptychostomum subg. Ptychostomum]]