View source for Dicranum ontariense

{{Treatment/ID
|accepted_name=Dicranum ontariense
|accepted_authority=W. L. Peterson
|publications={{Treatment/Publication
|title=Canad. J. Bot.
|place=55: 988. 1977,
}}
|basionyms={{Treatment/ID/Basionym
|name=Dicranum drummondii
|authority=Sullivant ex Lindberg
|rank=species
|publication_title=Bot. Not.
|publication_place=1865: 79. 1865,
}}
|synonyms=
|hierarchy=Dicranaceae;Dicranum;Dicranum ontariense
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Dicranaceae]]</div><div class="higher-taxon"><small>genus</small>[[Dicranum]]</div><div class="higher-taxon"><small>species</small>[[Dicranum ontariense]]</div></div>
|volume=Volume 27
|mention_page=page 401, 408, 409
|treatment_page=page 407
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>in loose tufts, dark to light green, dull. <b>Stems</b> 3–8 cm, densely tomentose below with reddish brown rhizoids. <b>Leaves</b> falcate-secund, flexuose, contorted when dry, slightly undulate, (5–)6.5–9(–10) mm × 1–1.5 mm, concave below, keeled above, from a lanceolate base to a long-acuminate apex; margins plane, strongly serrate above; laminae 1-stratose, rarely with 2-stratose regions on margins or near costa; costa percurrent to slightly excurrent, 1/6–1/5 the width of the leaves at base, papillose to spinose above on numerous, low abaxial ridges, with a row of guide cells, two thick, well-developed stereid bands above and below extending to apex, adaxial epidermal layer of cells not differentiated, the abaxial layer differentiated; cell walls between lamina cells not bulging or weakly bulging; leaf cells prorate on abaxial surface, sometimes papillose adaxially; alar cells 2-stratose, rarely 3-stratose in parts, differentiated, not extending to costa; proximal laminal cells rectangular, pitted, (22–)40–64(–126) × (2–)7–8(–10) µm; distal laminal cells short-rectangular to rectangular, not pitted, ± in longitudinal rows, marginal cells usually more elongate, some distal cells with long toothlike projections, scattered on abaxial surface, (7–)12–18(–42) × (5–)8–12(–16) µm. <b>Sexual</b> condition pseudomonoicous; dwarf males on stem rhizoids of female plants; interior perichaetial leaves abruptly long-acuminate, convolute-sheathing. <b>Seta</b> 2–3.5 cm, often aggregate 2–5 per perichaetium, sometimes solitary, yellow, brown or reddish yellow. <b>Capsule</b> 2–3 mm, arcuate, inclined to horizontal, furrowed when dry, yellow to light brown; operculum 1.5–3 mm. <b>Spores</b> 9–20 µm.</span><!--

-->{{Treatment/Body
|phenology=Capsules mature spring.
|habitat=Humus, soil, or soil over rock, rarely rotten logs or stumps, usually in mesic to dry coniferous woods, sometimes swamps and bogs
|elevation=60-1200 m
|distribution=Alta.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.S.;Ont.;P.E.I.;Que.;Sask.;Maine;Mass.;Mich.;Minn.;N.H.;N.J.;N.Y.;N.C.;Ohio;Pa.;Tenn.;W.Va.;Wis.;Wyo.
|discussion=<p>W. L. Peterson (1979) recorded <i>Dicranum ontariense</i> from Alberta. This is a North American endemic species that was previously mistaken for <i>D. drummondii</i> Müller Hal., a predominately Eurasian species which was unknown on this continent until it was discovered just recently on the Aleutians Islands. Peterson (1977) clarified the taxonomic position of <i>D. ontariense</i>, while P. Isoviita (1977) amplified on the complex nomenclatural details of why it must be recognized as a species distinct from <i>D. drummondii</i>. The main distinguishing features of <i>D. ontariense</i> are the dark to light green, dull, falcate-secund, flexuose tipped, slightly undulate leaves, contorted when dry, keeled above from a lanceolate base to a long-acumination, the leaf apices papillose to spinose above on abaxial surface, the laminae 1-stratose except for occasional 2-stratose regions on margins, the leaf margins plane, strongly serrate above, and the usually multiple sporophytes, 2–5 per perichaetium.</p><!--
--><p>This species is sometimes confused with an environmental form of <i>Dicranum undulatum</i> that has nearly percurrent costae and ± acute apices. The aggregate setae of <i>D. ontariense</i> will immediately distinguish it from that form, which has solitary setae. The dull leaves that are contorted when dry, and the leaf apices that are long-acuminate, abundantly spinose on the abaxial surface, are other superficial features to distinguish it from <i>D. undulatum</i>, which has shiny, usually broadly acute, smooth or serrulate leaf apices. Also, on occasion, <i>D. ontariense</i> can be confused with large forms of <i>D. condensatum</i> when sterile. The thin-walled, short-rectangular to quadrate distal-median cells in more or less regular rows of the former will distinguish it from the latter, which has irregularly shaped cells that are thick-walled and usually not in well defined rows. When fruiting, the aggregate setae on some of the plants of <i>D. ontariense</i> will immediately distinguish it from <i>D. condensatum</i>, which has solitary setae.</p>
|tables=
|references=
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-->{{#Taxon:
name=Dicranum ontariense
|authority=W. L. Peterson
|rank=species
|parent rank=genus
|synonyms=
|basionyms=Dicranum drummondii
|family=Dicranaceae
|phenology=Capsules mature spring.
|habitat=Humus, soil, or soil over rock, rarely rotten logs or stumps, usually in mesic to dry coniferous woods, sometimes swamps and bogs
|elevation=60-1200 m
|distribution=Alta.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.S.;Ont.;P.E.I.;Que.;Sask.;Maine;Mass.;Mich.;Minn.;N.H.;N.J.;N.Y.;N.C.;Ohio;Pa.;Tenn.;W.Va.;Wis.;Wyo.
|reference=None
|publication title=Canad. J. Bot.
|publication year=
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V27/V27_577.xml
|genus=Dicranum
|species=Dicranum ontariense
}}<!--

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