View source for Grimmia olneyi

{{Treatment/ID
|accepted_name=Grimmia olneyi
|accepted_authority=Sullivant in W. S. Sullivant and C. L. Lesquereux
|publications={{Treatment/Publication
|title=in W. S. Sullivant and C. L. Lesquereux, Musc. Bor.-Amer.,
|place=141. 1857,
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Grimmia austinii
|authority=Kindberg
|rank=species
}}
|hierarchy=Grimmiaceae;Grimmiaceae subfam. Grimmioideae;Grimmia;Grimmia subg. Litoneuron;Grimmia olneyi
|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. Litoneuron]]</div><div class="higher-taxon"><small>species</small>[[Grimmia olneyi]]</div></div>
|volume=Volume 27
|mention_page=page 229, 243, 245
|treatment_page=page 244
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>in flat patches, dark green to brownish black. <b>Stems</b> 1–2 cm. <b>Leaves</b> narrowly ovate-lanceolate from an ovate base, 2–3 × 0.4–0.8 mm, both margins incurved, intermarginal bands absent, awn 0.1–0.5 mm, not decurrent, acute, costa narrow proximally; basal juxtacostal laminal cells quadrate to short-rectangular, straight, thick lateral walls, green; basal marginal laminal cells quadrate, straight, thick transverse and thin lateral walls, green, hyaline; medial laminal cells quadrate, slightly thick-walled; distal laminal cells 2–4 stratose, rounded, thick-walled. <b>Perichaetial</b> leaves not enlarged. <b>Seta</b> sigmoid, 3–4 mm. <b>Capsule</b> occasionally present, exserted, brown, oblong-ovoid, exothecial cells short-rectangular, thin-walled, stomata present, annulus of 2–3 rows of rectangular, thick-walled cells, operculum long-rostrate, peristome perforate in distal half, split in distal half. <b>Calyptra</b> cucullate.</span><!--

-->{{Treatment/Body
|habitat=Cracks and exposed faces of dry to periodically wet, acidic or calcareous rocks, commonly along streams or splash zones of lake shores
|elevation=low to moderate elevations (20-600 m)
|distribution=N.S.;Ont.;Ark.;Conn.;Del.;Maine;Mass.;Mich.;Mo.;N.H.;N.J.;N.Y.;N.C.;Pa.;R.I.;Tenn.;Vt.;Va.
|discussion=<p><i>Grimmia olneyi</i> is endemic to eastern North America, with its center of distribution along the Appalachians from the New England states to North Carolina and eastern Tennessee. A disjunct population occurs on the Ozark Plateau of Missouri and Arkansas. Unlike <i>G. unicolor</i>, <i>G. olneyi</i> is tolerant of calcareous rocks and is able to occupy drier sites. Because of its sigmoid seta and somewhat wrinkled capsule, it is usually placed in subg. Rhabdogrimmia. However, the seta of <i>G. olneyi</i> is usually only somewhat sigmoid and is rarely arcuate. Further, its capsules only become wrinkled when dry, whereas the members of subg. Rhabdogrimmia typically have plicate capsules whether dry or turgid. In fact, specimens of <i>G. olneyi</i> are most commonly misidentified as either <i>G. ovalis</i> or <i>G. laevigata</i>, in subg. Litoneuron. The seta and capsule of <i>G. olneyi</i> are at the extremes of both subgenera. However, the general habit of the plants and their leaf structure suggests a close relationship with <i>G. ovalis</i> and <i>G. unicolor</i>.</p><!--
--><p><i>Grimmia olneyi</i> and <i>G. laevigata</i> have broadly overlapping distributions in eastern North America, where many specimens of <i>G. olneyi</i> have been misidentified as <i>G. laevigata</i>. Typical specimens of <i>G. olneyi</i> are readily separated from <i>G. laevigata</i>. However, some leaves on a stem of <i>G. laevigata</i> may have defined ovate bases with narrowly decurrent awns. These specimens will resemble <i>G. olneyi</i>. However, the costa of <i>G. olneyi</i> is always narrow at the base, while that of <i>G. laevigata</i> becomes broad at the base, occupying up to 1/3 of the lamina, and the costa grades gradually into the basal laminal cells. Furthermore, <i>G. olneyi</i> has quadrate to short-rectangular basal juxtacostal cells, while those of <i>G. laevigata</i> are elongate, almost resembling costal cells. <i>Grimmia olneyi</i> most closely resembles <i>G. ovalis</i>. Both have ovate lanceolate leaves from an ovate base, with a narrow distal lamina that is channelled, ending in a narrowly attached, long and toothed awn. The costa is narrow proximally in both species. However, they are otherwise quite distinct. Aside from the sigmoid seta and slightly wrinkled dry capsule of <i>G. olneyi</i>, its basal juxtacostal laminal cells are shorter and straighter than those of <i>G. ovalis</i> and its basal marginal cells are quadrate while those of <i>G. ovalis</i> are mostly rectangular. Geographical distribution has also been used to separate these species; H. A. Crum and L. E. Anderson (1981) rejected all reports of <i>G. ovalis</i> from eastern North America. However, we have seen a number of specimens of it from there and conclude that geography alone is not a reliable basis on which to differentiate these species.</p>
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-->{{#Taxon:
name=Grimmia olneyi
|authority=Sullivant in W. S. Sullivant and C. L. Lesquereux
|rank=species
|parent rank=subgenus
|synonyms=Grimmia austinii
|basionyms=
|family=Grimmiaceae
|habitat=Cracks and exposed faces of dry to periodically wet, acidic or calcareous rocks, commonly along streams or splash zones of lake shores
|elevation=low to moderate elevations (20-600 m)
|distribution=N.S.;Ont.;Ark.;Conn.;Del.;Maine;Mass.;Mich.;Mo.;N.H.;N.J.;N.Y.;N.C.;Pa.;R.I.;Tenn.;Vt.;Va.
|reference=None
|publication title=in W. S. Sullivant and C. L. Lesquereux, Musc. Bor.-Amer.,
|publication year=
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V27/V27_334.xml
|subfamily=Grimmiaceae subfam. Grimmioideae
|genus=Grimmia
|subgenus=Grimmia subg. Litoneuron
|species=Grimmia olneyi
}}<!--

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