View source for Grimmia incurva

{{Treatment/ID
|accepted_name=Grimmia incurva
|accepted_authority=Schwägrichen
|publications={{Treatment/Publication
|title=Sp. Musc. Frond. Suppl.
|place=1(1): 90. 1811,
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Grimmia curvifolia
|authority=Lindberg
}} {{Treatment/ID/Synonym
|name=Grimmia torngakiana
|authority=Brassard & Hedderson
}}
|hierarchy=Grimmiaceae;Grimmiaceae subfam. Grimmioideae;Grimmia;Grimmia subg. Rhabdogrimmia;Grimmia incurva
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Grimmiaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Grimmiaceae subfam. Grimmioideae]]</div><div class="higher-taxon"><small>genus</small>[[Grimmia]]</div><div class="higher-taxon"><small>subgenus</small>[[Grimmia subg. Rhabdogrimmia]]</div><div class="higher-taxon"><small>species</small>[[Grimmia incurva]]</div></div>
|volume=Volume 27
|mention_page=page 228, 248
|treatment_page=page 252
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>in usually rounded cushions, green to blackish. <b>Stems</b> 1–2 cm, central strand present. <b>Leaves</b> incurved and moderately contorted when dry, spreading when moist, oblong- to linear-lanceolate, tapering to a slender and acuminate, often hyaline apex, 2.5–4.5 × 0.3–0.5 mm. keeled, margins plane or recurved proximally on one or both sides, awns short, often only mucronate, occasionally long and denticulate, costa projecting on abaxial side; basal juxtacostal laminal cells long-rectangular, slightly sinuose, thick-walled; basal marginal laminal cells short- to long-rectangular, thin-walled; medial laminal cells rectangular, nodulose, thick-walled; distal laminal cells 1-stratose, margins and apex 2-stratose. <b>Gemmae</b> absent. <b>Sexual</b> condition dioicous. <b>Seta</b> arcuate, 1.5–2 mm. <b>Capsule</b> occasionally present, emergent to exserted, yellowish, obloid, smooth or somewhat wrinkled when dry, exothecial cells thin-walled, annulus present, operculum conic to rostrate, peristome teeth orange, divided distally, papillose. <b>Calyptra</b> mitrate.</span><!--

-->{{Treatment/Body
|habitat=Shaded damp, acidic rock
|elevation=moderate to high elevations (500-2500 m)
|distribution=Greenland;Alta.;B.C.;N.B.;Nfld. and Labr. (Labr.);Yukon;Calif.;Colo.;Maine;N.H.;N.Y.;Oreg.;S.Dak.;Wash.;Eurasia.
|discussion=<p>The peculiar east-west disjunct distribution of <i>Grimmia incurva</i> in North America may reflect its preference for damp sites. Specimens have been collected in New England and in the Maritime Provinces, with a second widespread area running from the Yukon south through to California. It is uncommon in the continental interior. <i>Grimmia incurva</i> is a shade-loving subalpine species, characterized by rounded dark green cushions and linear, contorted leaves. The awns are visible only with a hand-lens. This species has a habit more like that of Dicranowesia crispula than of a <i>Grimmia</i>. H. A. Crum and L. E. Anderson (1981) reported immersed capsules, but that is not correct; they are clearly exserted (H. C. Greven 1995). Crum and Anderson also observed: “Specimens recorded from Maine can be considered a shade form of <i>G. donniana</i>.” However, this confusion extends beyond Maine. Greven renamed nearly all the <i>G. donniana</i> specimens from New York and New Hampshire in MICH to <i>G. incurva</i>. Hastings agrees that these specimens cannot be <i>G. donniana</i> because the leaf shape is virtually identical to that of <i>G. incurva</i>, being narrowly lanceolate and contorted. However, like <i>G. donniana</i>, and unlike <i>G. incurva</i>, the specimens are autoicous and the setae are straight. Rather than expanding the concept of either <i>G. donniana</i> or <i>G. incurva</i> to include these anomalous specimens, we propose that they represent an as yet unpublished species with a unique combination of characters. Hastings thus retains <i>G. incurva</i> as being dioicous and <i>G. donniana</i> as having oblong-lanceolate leaves.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Grimmia incurva
|author=
|authority=Schwägrichen
|rank=species
|parent rank=subgenus
|synonyms=Grimmia curvifolia;Grimmia torngakiana
|basionyms=
|family=Grimmiaceae
|habitat=Shaded damp, acidic rock
|elevation=moderate to high elevations (500-2500 m)
|distribution=Greenland;Alta.;B.C.;N.B.;Nfld. and Labr. (Labr.);Yukon;Calif.;Colo.;Maine;N.H.;N.Y.;Oreg.;S.Dak.;Wash.;Eurasia.
|reference=None
|publication title=Sp. Musc. Frond. Suppl.
|publication year=
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V27/V27_347.xml
|subfamily=Grimmiaceae subfam. Grimmioideae
|genus=Grimmia
|subgenus=Grimmia subg. Rhabdogrimmia
|species=Grimmia incurva
}}<!--

-->[[Category:Treatment]][[Category:Grimmia subg. Rhabdogrimmia]]