View source for Grimmia orbicularis

{{Treatment/ID
|accepted_name=Grimmia orbicularis
|accepted_authority=Bruch
|publications={{Treatment/Publication
|title=in J. E. Smith et al., Engl. Bot., suppl.
|place=4: plate 2888. 1844,
}}
|basionyms=
|synonyms=
|hierarchy=Grimmiaceae;Grimmiaceae subfam. Grimmioideae;Grimmia;Grimmia subg. Rhabdogrimmia;Grimmia orbicularis
|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 orbicularis]]</div></div>
|volume=Volume 27
|mention_page=page 227, 250, 254
|treatment_page=page 255
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>in hoary, usually hemispherical cushions, grayish green. <b>Stem</b> 2–5 cm, central strand present. <b>Leaves</b> appressed and twisted when dry, erect when moist, broadly lanceolate, abruptly contracted into awn, 2–2.5 × 0.4–0.6 mm, keeled, margins recurved in the middle of the leaf on one or both sides, awns short to long, smooth to denticulate, costa weak proximally, projecting on abaxial side; basal juxtacostal laminal cells short- to long-rectangular, sinuose-nodulose, thick-walled; basal marginal laminal cells short- to long-rectangular, straight, with thickened transverse walls; medial laminal cells subquadrate, sinuose, thick-walled; distal laminal cells 1-stratose. <b>Gemmae</b> absent. <b>Sexual</b> condition autoicous. <b>Seta</b> arcuate, 2–3 mm. <b>Capsule</b> usually present, exserted, bent down into the cushions by the arcuate setae, yellowish brown to chestnut brown, globose to ovoid, smooth to weakly ribbed, when dry and empty wide-mouthed, exothecial cells thin-walled, annulus present, operculum mammillate, peristome teeth orange, broad, cribrose and irregularly cleft at apex. <b>Calyptra</b> cucullate.</span><!--

-->{{Treatment/Body
|habitat=Dry basic rocky substrates such as limestone, basalt, and mortar
|elevation=moderate to high elevations (200-2000 m)
|distribution=Ariz.;Calif.;Mont.;Nev.;Utah;Mexico;Central America (Guatemala);South America (Argentina;Chile);Europe;n Africa;Pacific Islands (New Zealand);Australia.
|discussion=<p><i>Grimmia orbicularis</i> is a thermophilous species with a preference for sunny, basic substrates. In North America it is known only from scattered localities in the Southwest. It may be confused with <i>G. pulvinata</i>, as both species form comparable hemispherical cushions and usually grow in the same habitat. However, they differ markedly in both gametophytic and sporophytic characters. <i>Grimmia orbicularis</i> has leaves with short- to long-rectangular basal juxtacostal cells with thick and nodulose lateral walls, and 1-stratose margins while <i>G. pulvinata</i> has leaves with quadrate to short-rectangular, thin-walled, basal juxtacostal cells and 2-stratose margins. <i>Grimmia orbicularis</i> has globose to ovoid capsules with broad, orange, cribrose and cleft peristome teeth, and mammillate opercula while <i>G. pulvinata</i> has obovoid capsules with fully developed dark red peristome teeth and rostrate opercula.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Grimmia orbicularis
|authority=Bruch
|rank=species
|parent rank=subgenus
|synonyms=
|basionyms=
|family=Grimmiaceae
|habitat=Dry basic rocky substrates such as limestone, basalt, and mortar
|elevation=moderate to high elevations (200-2000 m)
|distribution=Ariz.;Calif.;Mont.;Nev.;Utah;Mexico;Central America (Guatemala);South America (Argentina;Chile);Europe;n Africa;Pacific Islands (New Zealand);Australia.
|reference=None
|publication title=in J. E. Smith et al., Engl. Bot., suppl.
|publication year=
|special status=
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V27/V27_352.xml
|subfamily=Grimmiaceae subfam. Grimmioideae
|genus=Grimmia
|subgenus=Grimmia subg. Rhabdogrimmia
|species=Grimmia orbicularis
}}<!--

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