Difference between revisions of "Grimmia teretinervis"
Jahresber. Schles. Ges. Vaterl. Cult. 61: 216. 1884,.
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|name=Schistidium teretinerve | |name=Schistidium teretinerve | ||
|authority=(Limpricht) Limpricht | |authority=(Limpricht) Limpricht | ||
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|hierarchy=Grimmiaceae;Grimmiaceae subfam. Grimmioideae;Grimmia;Grimmia subg. Guembelia;Grimmia teretinervis | |hierarchy=Grimmiaceae;Grimmiaceae subfam. Grimmioideae;Grimmia;Grimmia subg. Guembelia;Grimmia teretinervis | ||
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|elevation=moderate to high elevations (200-1700 m) | |elevation=moderate to high elevations (200-1700 m) | ||
|distribution=Alta.;B.C.;N.W.T.;Ont.;Que.;Sask.;Yukon;Alaska;Ark.;Colo.;Minn.;Mo.;Mont.;Nev.;Okla.;Wis.;Europe. | |distribution=Alta.;B.C.;N.W.T.;Ont.;Que.;Sask.;Yukon;Alaska;Ark.;Colo.;Minn.;Mo.;Mont.;Nev.;Okla.;Wis.;Europe. | ||
| − | |discussion=<p>As reported by R. R. Ireland (1982b), Grimmia teretinervis is widely scattered across North America, but nowhere is it common. R. I. Hastings (2002) added several more Western collection locations to those reported by Ireland. Based on field observations and by correlating collecting localities with bedrock geology, Hastings proposed that the distribution of G. teretinervis in North America is largely correlated with the boundaries of ancient epicontinental seaways. These deposits have subsequently undergone faulting or were subjected to glacial-fluvial erosion. The ancient oceans provided the calcareous sediments, and the faulting and erosion created the steep exposures preferred by G. teretinervis. Sporophytes have never been observed for this species and, until reported by Ireland, antheridial plants also were unknown. Despite the lack of sporophytes, this species is readily identified by its unique costal structure, which is circular in transverse section. It commonly has thick-walled, bulging laminal cells and very short awns that are none-the-less often long-decurrent. These features give the plants a blackish brown, shiny thread-like appearance.</p> | + | |discussion=<p>As reported by R. R. Ireland (1982b), <i>Grimmia teretinervis</i> is widely scattered across North America, but nowhere is it common. R. I. Hastings (2002) added several more Western collection locations to those reported by Ireland. Based on field observations and by correlating collecting localities with bedrock geology, Hastings proposed that the distribution of <i>G. teretinervis</i> in North America is largely correlated with the boundaries of ancient epicontinental seaways. These deposits have subsequently undergone faulting or were subjected to glacial-fluvial erosion. The ancient oceans provided the calcareous sediments, and the faulting and erosion created the steep exposures preferred by <i>G. teretinervis</i>. Sporophytes have never been observed for this species and, until reported by Ireland, antheridial plants also were unknown. Despite the lack of sporophytes, this species is readily identified by its unique costal structure, which is circular in transverse section. It commonly has thick-walled, bulging laminal cells and very short awns that are none-the-less often long-decurrent. These features give the plants a blackish brown, shiny thread-like appearance.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Grimmia teretinervis | name=Grimmia teretinervis | ||
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|authority=Limpricht | |authority=Limpricht | ||
|rank=species | |rank=species | ||
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|publication year= | |publication year= | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V27/V27_326.xml |
|subfamily=Grimmiaceae subfam. Grimmioideae | |subfamily=Grimmiaceae subfam. Grimmioideae | ||
|genus=Grimmia | |genus=Grimmia | ||
Latest revision as of 21:25, 5 November 2020
Plants in loose tufts, green-brown to reddish brown, shiny. Stems 2–3 cm, central strand strong. Leaves ovate-cordate to lanceolate, 0.6–1.2 × 0.2–0.5 mm, keeled, not plicate, margins plane, awn to 0.3 mm, often just hyaline tipped, commonly long-decurrent, costal transverse section prominent, circular distally; basal juxtacostal laminal cells quadrate to short-rectangular, straight, thin- to thick-walled; basal marginal laminal cells oblate to quadrate, straight, thick-walled, not hyaline; medial laminal cells rounded-quadrate, thick-walled; distal laminal cells 2-stratose, bulging, marginal cells 2-stratose, bulging. Sexual condition dioicous, perichaetial leaves unknown. Seta unknown. Capsule unknown.
Habitat: Moist calcareous sandstone, limestone and dolomite outcrops
Elevation: moderate to high elevations (200-1700 m)
Distribution
Alta., B.C., N.W.T., Ont., Que., Sask., Yukon, Alaska, Ark., Colo., Minn., Mo., Mont., Nev., Okla., Wis., Europe.
Discussion
As reported by R. R. Ireland (1982b), Grimmia teretinervis is widely scattered across North America, but nowhere is it common. R. I. Hastings (2002) added several more Western collection locations to those reported by Ireland. Based on field observations and by correlating collecting localities with bedrock geology, Hastings proposed that the distribution of G. teretinervis in North America is largely correlated with the boundaries of ancient epicontinental seaways. These deposits have subsequently undergone faulting or were subjected to glacial-fluvial erosion. The ancient oceans provided the calcareous sediments, and the faulting and erosion created the steep exposures preferred by G. teretinervis. Sporophytes have never been observed for this species and, until reported by Ireland, antheridial plants also were unknown. Despite the lack of sporophytes, this species is readily identified by its unique costal structure, which is circular in transverse section. It commonly has thick-walled, bulging laminal cells and very short awns that are none-the-less often long-decurrent. These features give the plants a blackish brown, shiny thread-like appearance.
Selected References
None.