View source for Atrichum flavisetum

{{Treatment/ID
|accepted_name=Atrichum flavisetum
|accepted_authority=Mitten
|publications={{Treatment/Publication
|title=J. Proc. Linn. Soc., Bot., suppl.
|place=2: 150. 1859,
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Atrichum hausknechtii
|authority=Juratzka & Milde
|rank=species
}} {{Treatment/ID/Synonym
|name=Atrichum undulatum var. gracilisetum
|authority=Bescherelle
|rank=variety
}} {{Treatment/ID/Synonym
|name=Atrichum undulatum var. hausknechtii
|authority=(Juratzka & Milde) Frye
|rank=variety
}}
|hierarchy=Polytrichaceae;Atrichum;Atrichum flavisetum
|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 flavisetum]]</div></div>
|volume=Volume 27
|mention_page=page 148, 149, 155
|treatment_page=page 154
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>medium-sized, green or light green when wet, dark green when dry. <b>Stems</b> to 2 cm, often branched by subfloral innovations. <b>Leaves</b> ca. 10, oblong-linear, acute to acuminate, transversely undulate distally, toothed along the margin nearly to the base, with irregular abaxial teeth corresponding to the undulations; costa percurrent to weakly excurrent; lamellae 4–6, 2–4 cells high; median leaf cells 24–30 µm wide, moderately thick-walled, ± isodiametric, transversely elongate. <b>Sexual</b> condition synoicous; perichaetia terminal or on an innovation continuing growth of the shoot and forming new perichaetia, several successive inflorescences with maturing capsules persistent on one stem; perigonia inconspicuous, hidden amid the perichaetial leaves. <b>Seta</b> (1–)2–4 per inflorescence, to 3.5 cm, rather slender, straw-yellow. <b>Capsule</b> 8 × 1.3 mm, erect to inclined, short-cylindric, nearly straight. <b>Spores</b> (8–)15–16 µm.</span><!--

-->{{Treatment/Body
|phenology=Capsule maturity date not determined.
|habitat=Banks or stumps in woods, roots of fallen trees, ravines in crevices of rock outcrops
|elevation=low to moderate elevations
|distribution=B.C.;Wash.;e Europe;Asia.
|discussion=<p><i>Atrichum flavisetum</i> appears to be rare in North America and its distribution is poorly known. In the Old World it is known from European Russia, the Ural Mountains, the Caucasus, the Russian Far East, central Asia (Altai), China and the Himalayas. It is almost inseparable from <i>A. undulatum</i> by leaf characters alone, but usually fruits freely. The species is synoicous, but the antheridia and archegonia are not intermingled. The antheridia are central in position, associated with minute perigonial bracts; the archegonia arise at the periphery of the common involucre (C. Warnstorf 1914). Besides the inflorescence, <i>A. flavisetum</i> differs by its ecology, and the slender, yellowish seta and smallish capsules, which are short-cylindric and nearly straight. Older sporophytes often persist from successive inflorescences, seemingly lateral in position.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Atrichum flavisetum
|authority=Mitten
|rank=species
|parent rank=genus
|synonyms=Atrichum hausknechtii;Atrichum undulatum var. gracilisetum;Atrichum undulatum var. hausknechtii
|basionyms=
|family=Polytrichaceae
|phenology=Capsule maturity date not determined.
|habitat=Banks or stumps in woods, roots of fallen trees, ravines in crevices of rock outcrops
|elevation=low to moderate elevations
|distribution=B.C.;Wash.;e Europe;Asia.
|reference=None
|publication title=J. Proc. Linn. Soc., Bot., suppl.
|publication year=
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V27/V27_192.xml
|genus=Atrichum
|species=Atrichum flavisetum
}}<!--

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