The taxonomy of Arnica frigida and A . louiseana (Asteraceae)
The systematic relationships of the Arnica frigida–louiseana complex have been evaluated. This complex has been previously recognized as one species. A. louiseana, with three infraspecific taxa: subspecies frigida, griscomii, and louiseana. Morphological, phytogeographical, and cytological data supp...
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1986
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Online Access: | http://dx.doi.org/10.1139/b86-187 http://www.nrcresearchpress.com/doi/pdf/10.1139/b86-187 |
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crcansciencepubl:10.1139/b86-187 2023-12-17T10:33:16+01:00 The taxonomy of Arnica frigida and A . louiseana (Asteraceae) Downie, Stephen R. Denford, Keith E. 1986 http://dx.doi.org/10.1139/b86-187 http://www.nrcresearchpress.com/doi/pdf/10.1139/b86-187 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Botany volume 64, issue 7, page 1355-1372 ISSN 0008-4026 Plant Science journal-article 1986 crcansciencepubl https://doi.org/10.1139/b86-187 2023-11-19T13:39:28Z The systematic relationships of the Arnica frigida–louiseana complex have been evaluated. This complex has been previously recognized as one species. A. louiseana, with three infraspecific taxa: subspecies frigida, griscomii, and louiseana. Morphological, phytogeographical, and cytological data support the recognition of A. frigida ssp. frigida and the newly proposed combination A. frigida spp. griscomii. Arnica louiseana is also recognized at the specific level. All three taxa have distinct geographic distributions: A. frigida spp. frigida is found from eastern USSR, Alaska, Yukon, east to the Mackenzie River, N.W.T., with isolated populations east of the Mackenzie River and in northern British Columbia; A. frigida ssp. griscomii is extremely localized in Gaspé, Qué., and in northwest Newfoundland; and A. louiseana is restricted to high elevations in the Rocky Mountains of Alberta. The basic chromosome number for this complex is x = 19, with A. frigida ssp. frigida 2n = 38, 57, 76, and 95, A. frigida ssp. griscomii 2n = 76, and A. louiseana with chromosome complements of 2n = 76 and 95. This complex is predominantly apomictic with amphimictic phases in unglaciated Alaska. Disjunct distributions are probably the result of Pleistocene survival in refugia with apomictic phases being responsible for the recolonization of glaciated areas. Article in Journal/Newspaper Mackenzie river Newfoundland Alaska Yukon Canadian Science Publishing (via Crossref) Yukon Mackenzie River Canadian Journal of Botany 64 7 1355 1372 |
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Canadian Science Publishing (via Crossref) |
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crcansciencepubl |
language |
English |
topic |
Plant Science |
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Plant Science Downie, Stephen R. Denford, Keith E. The taxonomy of Arnica frigida and A . louiseana (Asteraceae) |
topic_facet |
Plant Science |
description |
The systematic relationships of the Arnica frigida–louiseana complex have been evaluated. This complex has been previously recognized as one species. A. louiseana, with three infraspecific taxa: subspecies frigida, griscomii, and louiseana. Morphological, phytogeographical, and cytological data support the recognition of A. frigida ssp. frigida and the newly proposed combination A. frigida spp. griscomii. Arnica louiseana is also recognized at the specific level. All three taxa have distinct geographic distributions: A. frigida spp. frigida is found from eastern USSR, Alaska, Yukon, east to the Mackenzie River, N.W.T., with isolated populations east of the Mackenzie River and in northern British Columbia; A. frigida ssp. griscomii is extremely localized in Gaspé, Qué., and in northwest Newfoundland; and A. louiseana is restricted to high elevations in the Rocky Mountains of Alberta. The basic chromosome number for this complex is x = 19, with A. frigida ssp. frigida 2n = 38, 57, 76, and 95, A. frigida ssp. griscomii 2n = 76, and A. louiseana with chromosome complements of 2n = 76 and 95. This complex is predominantly apomictic with amphimictic phases in unglaciated Alaska. Disjunct distributions are probably the result of Pleistocene survival in refugia with apomictic phases being responsible for the recolonization of glaciated areas. |
format |
Article in Journal/Newspaper |
author |
Downie, Stephen R. Denford, Keith E. |
author_facet |
Downie, Stephen R. Denford, Keith E. |
author_sort |
Downie, Stephen R. |
title |
The taxonomy of Arnica frigida and A . louiseana (Asteraceae) |
title_short |
The taxonomy of Arnica frigida and A . louiseana (Asteraceae) |
title_full |
The taxonomy of Arnica frigida and A . louiseana (Asteraceae) |
title_fullStr |
The taxonomy of Arnica frigida and A . louiseana (Asteraceae) |
title_full_unstemmed |
The taxonomy of Arnica frigida and A . louiseana (Asteraceae) |
title_sort |
taxonomy of arnica frigida and a . louiseana (asteraceae) |
publisher |
Canadian Science Publishing |
publishDate |
1986 |
url |
http://dx.doi.org/10.1139/b86-187 http://www.nrcresearchpress.com/doi/pdf/10.1139/b86-187 |
geographic |
Yukon Mackenzie River |
geographic_facet |
Yukon Mackenzie River |
genre |
Mackenzie river Newfoundland Alaska Yukon |
genre_facet |
Mackenzie river Newfoundland Alaska Yukon |
op_source |
Canadian Journal of Botany volume 64, issue 7, page 1355-1372 ISSN 0008-4026 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/b86-187 |
container_title |
Canadian Journal of Botany |
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64 |
container_issue |
7 |
container_start_page |
1355 |
op_container_end_page |
1372 |
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1785587192743067648 |