Resolving two enigmatic distributions in the genus Orthotrichum (Orthotrichaceae): A re-evaluation of Orthotrichum fenestratum and O. sordidum
Orthotrichum fenestratum Card. & Thér, described from St. Paul Island and reported only from a few small islands in the Bering Sea and Aleutian Chain, was considered unique because of perforations in the exostome. Comparisons with the uncommon, but widespread, arctic-montane species, O. pylaisii...
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ftmagnoliapress:oai:ojs.mapress.com:article/20678 2023-05-15T14:57:55+02:00 Resolving two enigmatic distributions in the genus Orthotrichum (Orthotrichaceae): A re-evaluation of Orthotrichum fenestratum and O. sordidum VITT, DALE H. 2017-07-24 application/pdf http://www.mapress.com/j/bde/article/view/bde.39.1.15 https://doi.org/10.11646/bde.39.1.15 eng eng Magnolia Press http://www.mapress.com/j/bde/article/view/bde.39.1.15/11853 Copyright (c) 2017 Bryophyte Diversity and Evolution Bryophyte Diversity and Evolution; Vol 39, No 1: 24 July 2017; 115–121 2381-9685 2381-9677 10.11646/bde.39.1 Alaska arctic mosses J. M. Macoun Orthotrichum fenestratum Orthotrichum pylaisii Orthotrichum sordidum info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2017 ftmagnoliapress https://doi.org/10.11646/bde.39.1.15 2018-08-24T16:39:34Z Orthotrichum fenestratum Card. & Thér, described from St. Paul Island and reported only from a few small islands in the Bering Sea and Aleutian Chain, was considered unique because of perforations in the exostome. Comparisons with the uncommon, but widespread, arctic-montane species, O. pylaisii Brid., indicates that like O. fenestratum, O. pylaisii also has exostomial perforations and these species are conspecific. The distribution of O. pylaisii is mapped for northwestern North America. Orthotrichum sordidum Sull. & Lesq. was described from eastern North America and then reported from East Asia and from scattered locations in Alaska and Greenland. All of the Alaskan specimens are O. pylaisii and also all of the Greenland specimens examined belong to this latter species; consequently O. sordidum should be removed from the floras of these northern regions. Similar to O. pylaisii, O. sordidum also has perforate (and fenestrate) exostome teeth, but differs in a number of features, including 8 vs.16 exostome teeth; deeply ribbed, emergent capsules vs. lightly ribbed, exserted capsules; and 8, well-developed endostome segments vs. rudimentary segments of O. pylaisii. Orthotrichum sordidum occurs almost exclusively on tree trunks, while O. pylaisii occurs on rock. Article in Journal/Newspaper Arctic Bering Sea Greenland Alaska Magnolia press Arctic Bering Sea Greenland Bryophyte Diversity and Evolution 39 1 115 |
institution |
Open Polar |
collection |
Magnolia press |
op_collection_id |
ftmagnoliapress |
language |
English |
topic |
Alaska arctic mosses J. M. Macoun Orthotrichum fenestratum Orthotrichum pylaisii Orthotrichum sordidum |
spellingShingle |
Alaska arctic mosses J. M. Macoun Orthotrichum fenestratum Orthotrichum pylaisii Orthotrichum sordidum VITT, DALE H. Resolving two enigmatic distributions in the genus Orthotrichum (Orthotrichaceae): A re-evaluation of Orthotrichum fenestratum and O. sordidum |
topic_facet |
Alaska arctic mosses J. M. Macoun Orthotrichum fenestratum Orthotrichum pylaisii Orthotrichum sordidum |
description |
Orthotrichum fenestratum Card. & Thér, described from St. Paul Island and reported only from a few small islands in the Bering Sea and Aleutian Chain, was considered unique because of perforations in the exostome. Comparisons with the uncommon, but widespread, arctic-montane species, O. pylaisii Brid., indicates that like O. fenestratum, O. pylaisii also has exostomial perforations and these species are conspecific. The distribution of O. pylaisii is mapped for northwestern North America. Orthotrichum sordidum Sull. & Lesq. was described from eastern North America and then reported from East Asia and from scattered locations in Alaska and Greenland. All of the Alaskan specimens are O. pylaisii and also all of the Greenland specimens examined belong to this latter species; consequently O. sordidum should be removed from the floras of these northern regions. Similar to O. pylaisii, O. sordidum also has perforate (and fenestrate) exostome teeth, but differs in a number of features, including 8 vs.16 exostome teeth; deeply ribbed, emergent capsules vs. lightly ribbed, exserted capsules; and 8, well-developed endostome segments vs. rudimentary segments of O. pylaisii. Orthotrichum sordidum occurs almost exclusively on tree trunks, while O. pylaisii occurs on rock. |
format |
Article in Journal/Newspaper |
author |
VITT, DALE H. |
author_facet |
VITT, DALE H. |
author_sort |
VITT, DALE H. |
title |
Resolving two enigmatic distributions in the genus Orthotrichum (Orthotrichaceae): A re-evaluation of Orthotrichum fenestratum and O. sordidum |
title_short |
Resolving two enigmatic distributions in the genus Orthotrichum (Orthotrichaceae): A re-evaluation of Orthotrichum fenestratum and O. sordidum |
title_full |
Resolving two enigmatic distributions in the genus Orthotrichum (Orthotrichaceae): A re-evaluation of Orthotrichum fenestratum and O. sordidum |
title_fullStr |
Resolving two enigmatic distributions in the genus Orthotrichum (Orthotrichaceae): A re-evaluation of Orthotrichum fenestratum and O. sordidum |
title_full_unstemmed |
Resolving two enigmatic distributions in the genus Orthotrichum (Orthotrichaceae): A re-evaluation of Orthotrichum fenestratum and O. sordidum |
title_sort |
resolving two enigmatic distributions in the genus orthotrichum (orthotrichaceae): a re-evaluation of orthotrichum fenestratum and o. sordidum |
publisher |
Magnolia Press |
publishDate |
2017 |
url |
http://www.mapress.com/j/bde/article/view/bde.39.1.15 https://doi.org/10.11646/bde.39.1.15 |
geographic |
Arctic Bering Sea Greenland |
geographic_facet |
Arctic Bering Sea Greenland |
genre |
Arctic Bering Sea Greenland Alaska |
genre_facet |
Arctic Bering Sea Greenland Alaska |
op_source |
Bryophyte Diversity and Evolution; Vol 39, No 1: 24 July 2017; 115–121 2381-9685 2381-9677 10.11646/bde.39.1 |
op_relation |
http://www.mapress.com/j/bde/article/view/bde.39.1.15/11853 |
op_rights |
Copyright (c) 2017 Bryophyte Diversity and Evolution |
op_doi |
https://doi.org/10.11646/bde.39.1.15 |
container_title |
Bryophyte Diversity and Evolution |
container_volume |
39 |
container_issue |
1 |
container_start_page |
115 |
_version_ |
1766330017742061568 |