View source for Grimmia reflexidens

{{Treatment/ID
|accepted_name=Grimmia reflexidens
|accepted_authority=Müller Hal.
|publications={{Treatment/Publication
|title=Syn. Musc. Frond.
|place=1: 795. 1849,
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Grimmia grisea
|authority=Cardot
|rank=species
}}
|hierarchy=Grimmiaceae;Grimmiaceae subfam. Grimmioideae;Grimmia;Grimmia subg. Guembelia;Grimmia reflexidens
|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. Guembelia]]</div><div class="higher-taxon"><small>species</small>[[Grimmia reflexidens]]</div></div>
|volume=Volume 27
|mention_page=page 227, 237, 239
|treatment_page=page 238
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole_organism coloration;whole_organism growth form;cushion architecture or arrangement;cushion pubescence"><b>Plants </b>in compact hairy cushions, grayish green.</span> <span class="statement" id="st-d0_s1" data-properties="stem some measurement;central strand presence"><b>Stems </b>1–2 cm, central strand absent.</span> <span class="statement" id="st-d0_s2" data-properties="leaf shape;leaf length;leaf width;leaf shape;leaf architecture or arrangement or shape or vernation;margin shape;awn some measurement;awn length or size;awn architecture or pubescence or relief;awn shape;awn shape;awn shape;costal transverse-section prominence;costal transverse-section arrangement or shape"><b>Leaves </b>ovate to oblong-lanceolate, 0.1–1.15 × 0.3–0.5 mm, keeled, not plicate, margins plane, awns 1–2 mm, very long, smooth to slightly denticulate, flattened basally, long-decurrent, costal transverse-section prominent, semicircular;</span> <span class="statement" id="st-d0_s3" data-properties="laminal cell shape;laminal cell shape;laminal cell width;laminal cell architecture">basal juxtacostal laminal cells rectangular, sometimes nodulose, thin to thick-walled;</span> <span class="statement" id="st-d0_s4" data-properties="basal marginal laminal cell shape;basal marginal laminal cell coloration;wall size or width;wall dehiscence or orientation;row quantity">basal marginal laminal cells rectangular with thickened transverse walls, pellucid in 2–4 rows;</span> <span class="statement" id="st-d0_s5" data-properties="medial laminal cell shape;medial laminal cell architecture;medial laminal cell architecture">medial laminal cells roundedquadrate, slightly sinuose, thick-walled;</span> <span class="statement" id="st-d0_s6" data-properties="distal laminal cell coloration;distal laminal cell architecture;distal laminal cell pubescence or shape;ridge architecture">distal laminal cells yellowish green, 1-stratose with 2-stratose ridges, not bulging, marginal cells 2-stratose, not bulging.</span> <span class="statement" id="st-d0_s7" data-properties="marginal cell architecture;marginal cell pubescence or shape;marginal cell reproduction;whole-organism reproduction;perichaetial leaf size"><b>Sexual </b>condition dioicous, perichaetial leaves enlarged.</span> <span class="statement" id="st-d0_s8" data-properties="">[Seta straight, 1.5–2 mm. <b>Capsule</b> absent in northern hemisphere material, emergent to shortly exserted, yellowish brown, oblate, exothecial cells irregularly short-rectangular, thin-walled, stomata absent, annulus of 1 row of quadrate, thick-walled cells, operculum mammillate to rostrate, peristome present, nearly fully-developed, split and perforated only in apex, papillose.]</span><!--

-->{{Treatment/Body
|habitat=Dry acidic rock
|elevation=low [to moderate] elevations (50[-300] m)
|distribution=Nfld. and Labr. (Nfld.);South America (Argentina);South America (Chile);Atlantic Islands (Iceland);Pacific Islands (New Zealand);Australia
|discussion=<p>Of conservation concern.</p><!--
--><p>Previous to its discovery in Iceland, as Grimmia grisea (H. C. Greven 1998), G. reflexidens was known from only the Southern Hemisphere. It had previously been collected east of East Bay, Newfoundland, now the only known locality in North America, but was not recognized as G. reflexidens. The latter is similar to G. asperitricha Dixon & Sainsbury of New Zealand, and the two species have been confused by G. O. K. Sainsbury (1945) as well as by R. Ochyra (1993). J. Muñoz (1998b) synonymized G. reflexidens with G. sessitana. However, the former is readily separated from the latter by: (1) enlarged perichaetial leaves, (2) decurrent awns, (3) non-bulging laminal cells, and (4) dioicous sexual condition. Capsules are unknown from Northern Hemisphere material, but G. reflexidens lacks stomata while they are present for G. sessitana. Although G. reflexidens and G. teretinervis both have decurrent awns they are easily separated by a number of characters: G. reflexidens grows in compact cushions, has long awns, and a semicircular costa; G. teretinervis grows in loose clumps, is hyaline-tipped to short-awned, and has a unique costa that is distally almost completely circular in transverse section.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Grimmia reflexidens
|authority=Müller Hal.
|rank=species
|parent rank=subgenus
|synonyms=Grimmia grisea
|basionyms=
|family=Grimmiaceae
|habitat=Dry acidic rock
|elevation=low [to moderate] elevations (50[-300] m)
|distribution=Nfld. and Labr. (Nfld.);South America (Argentina);South America (Chile);Atlantic Islands (Iceland);Pacific Islands (New Zealand);Australia
|reference=None
|publication title=Syn. Musc. Frond.
|publication year=
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V27/V27_325.xml
|subfamily=Grimmiaceae subfam. Grimmioideae
|genus=Grimmia
|subgenus=Grimmia subg. Guembelia
|species=Grimmia reflexidens
|awn architecture or pubescence or relief=smooth
|awn length or size=long
|awn shape=long-decurrent;flattened;denticulate
|awn some measurement=1mm;2mm
|basal marginal laminal cell coloration=pellucid
|basal marginal laminal cell shape=rectangular
|central strand presence=absent
|costal transverse-section arrangement or shape=semicircular
|costal transverse-section prominence=prominent
|cushion architecture or arrangement=compact
|cushion pubescence=hairy
|distal laminal cell architecture=1-stratose
|distal laminal cell coloration=yellowish green
|distal laminal cell pubescence or shape=not bulging
|laminal cell architecture=thick-walled
|laminal cell shape=nodulose;rectangular
|laminal cell width=thin
|leaf architecture or arrangement or shape or vernation=not plicate
|leaf length=0.1mm;1.15mm
|leaf shape=keeled;ovate;oblong-lanceolate
|leaf width=0.3mm;0.5mm
|margin shape=plane
|marginal cell architecture=2-stratose
|marginal cell pubescence or shape=not bulging
|marginal cell reproduction=sexual
|medial laminal cell architecture=thick-walled;sinuose
|medial laminal cell shape=roundedquadrate
|perichaetial leaf size=enlarged
|ridge architecture=2-stratose
|row quantity=2;4
|stem some measurement=1cm;2cm
|wall dehiscence or orientation=transverse
|wall size or width=thickened
|whole-organism reproduction=dioicous
|whole_organism coloration=grayish green
|whole_organism growth form=plant
}}<!--

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