View source for Atrichum tenellum

{{Treatment/ID
|accepted_name=Atrichum tenellum
|accepted_authority=(Röhling) Bruch & Schimper
|publications={{Treatment/Publication
|title=Bryol. Europ.
|place=4: 237. 1844,
}}
|basionyms={{Treatment/ID/Synonym
|name=Catharinea tenella
|authority=Röhling
}}
|synonyms=
|hierarchy=Polytrichaceae;Atrichum;Atrichum tenellum
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Polytrichaceae]]</div><div class="higher-taxon"><small>genus</small>[[Atrichum]]</div><div class="higher-taxon"><small>species</small>[[Atrichum tenellum]]</div></div>
|volume=Volume 27
|mention_page=page 148, 149
|treatment_page=page 150
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>small, gracile, and rather delicate in appearance, green to brownish green. <b>Stems</b> to 2 cm. <b>Leaves</b> 2.5–6 × 0.7–1.5 mm, lanceolate to ovate-lanceolate, plane or rarely weakly undulate, teeth few and scattered on abaxial surface of lamina or absent, the apex acute, proximal leaves somewhat obtuse; border narrow, with small, rather distant marginal teeth; costa subpercurrent to percurrent, with several abaxial teeth near apex; lamellae 2–5, 4–7 cells high; median leaf cells 19–24 µm wide, laxly subquadrate to irregularly hexagonal, evenly thin-walled, not or weakly collenchymatous, becoming somewhat larger adjacent to the costa, smooth. <b>Sexual</b> condition dioicous; male plants about same size as female, perigonial bracts broad, forming a cup-like inflorescence, sometimes more than one per plant. <b>Seta</b> 1(–2) per perichaetium, to 2 cm. <b>Capsule</b> 1–2 × 0.5–0.8 mm, erect to inclined, straight to somewhat curved; operculum 1.5–2 mm. <b>Spores</b> 15–30 µm.</span><!--

-->{{Treatment/Body
|phenology=Capsules mature late summer (Aug–Sep).
|habitat=Clay or sandy soil, especially in exposed habitats, beside streams, in roadside ditches, along trails and clearings in woodlands
|elevation=low to moderate elevations
|distribution=B.C.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.W.T.;Ont.;P.E.I.;Que.;Ill.;Maine;Minn.;Wis.;n;c Europe;n Asia.
|discussion=<p><i>Atrichum tenellum</i> is a species with few distinguishing features, evidently rather rare (or seldom collected), with comparatively few lamellae, a narrow leaf border, thin-walled median leaf cells without trigones, and abaxial teeth few or absent. Previously confused with <i>A. crispum</i>, it is easily distinguished by the absence of papillae on the marginal teeth and border. In addition, the lamellae of <i>A. crispum</i> are always low and discontinuous.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Atrichum tenellum
|author=
|authority=(Röhling) Bruch & Schimper
|rank=species
|parent rank=genus
|synonyms=
|basionyms=Catharinea tenella
|family=Polytrichaceae
|phenology=Capsules mature late summer (Aug–Sep).
|habitat=Clay or sandy soil, especially in exposed habitats, beside streams, in roadside ditches, along trails and clearings in woodlands
|elevation=low to moderate elevations
|distribution=B.C.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.W.T.;Ont.;P.E.I.;Que.;Ill.;Maine;Minn.;Wis.;n;c Europe;n Asia.
|reference=None
|publication title=Bryol. Europ.
|publication year=
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V27/V27_185.xml
|genus=Atrichum
|species=Atrichum tenellum
}}<!--

-->[[Category:Treatment]][[Category:Atrichum]]