Cytotaxonomic observations on North American Festuca (Poaceae)
The presence of B chromosomes is reported in Festuca altaica Trin., where a plant with relatively wide and often flat leaves had a chromosome number of 2n = 4x = 28; an adjacent plant, with conspicuously narrow and tightly rolled leaves, had 2n = 4x = 28 + 2B chromosomes. A first chromosome count of...
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Language: | English |
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Canadian Science Publishing
1992
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Online Access: | http://dx.doi.org/10.1139/b92-241 http://www.nrcresearchpress.com/doi/pdf/10.1139/b92-241 |
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crcansciencepubl:10.1139/b92-241 2023-12-17T10:30:07+01:00 Cytotaxonomic observations on North American Festuca (Poaceae) Aiken, Susan G. Fedak, George 1992 http://dx.doi.org/10.1139/b92-241 http://www.nrcresearchpress.com/doi/pdf/10.1139/b92-241 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Botany volume 70, issue 10, page 1940-1944 ISSN 0008-4026 Plant Science journal-article 1992 crcansciencepubl https://doi.org/10.1139/b92-241 2023-11-19T13:39:23Z The presence of B chromosomes is reported in Festuca altaica Trin., where a plant with relatively wide and often flat leaves had a chromosome number of 2n = 4x = 28; an adjacent plant, with conspicuously narrow and tightly rolled leaves, had 2n = 4x = 28 + 2B chromosomes. A first chromosome count of 2n = 42 is reported for Festuca rubra L. ssp. densiuscula (Hackel) Piper, along with observations on the nomenclature and morphology of this west coast subspecies. A first chromosome count for a North American plant of Festuca brevissima Jurtzev is 2n = 14. Collections made in northern Yukon were compared with the type borrowed from Leningrad and with the distribution of this species relative to the other North American diploid Festuca, Festuca aggr. auriculata Drob. A collection of Festuca brachyphylla Schultes from northern Yukon had a chromosome number of 2n = 42, and unusual morphology and phenology were interpreted as the result of a snow patch habitat. A second record for Festuca dasyclada Hackel ex. Beal of a chromosome number of 2n = 28 and justifications for keeping this species in Festuca are presented. Key words: Poaceae, North American, Festuca, chromosomes, morphology, nomenclature. Article in Journal/Newspaper Festuca brachyphylla Yukon Canadian Science Publishing (via Crossref) Yukon Canadian Journal of Botany 70 10 1940 1944 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Plant Science |
spellingShingle |
Plant Science Aiken, Susan G. Fedak, George Cytotaxonomic observations on North American Festuca (Poaceae) |
topic_facet |
Plant Science |
description |
The presence of B chromosomes is reported in Festuca altaica Trin., where a plant with relatively wide and often flat leaves had a chromosome number of 2n = 4x = 28; an adjacent plant, with conspicuously narrow and tightly rolled leaves, had 2n = 4x = 28 + 2B chromosomes. A first chromosome count of 2n = 42 is reported for Festuca rubra L. ssp. densiuscula (Hackel) Piper, along with observations on the nomenclature and morphology of this west coast subspecies. A first chromosome count for a North American plant of Festuca brevissima Jurtzev is 2n = 14. Collections made in northern Yukon were compared with the type borrowed from Leningrad and with the distribution of this species relative to the other North American diploid Festuca, Festuca aggr. auriculata Drob. A collection of Festuca brachyphylla Schultes from northern Yukon had a chromosome number of 2n = 42, and unusual morphology and phenology were interpreted as the result of a snow patch habitat. A second record for Festuca dasyclada Hackel ex. Beal of a chromosome number of 2n = 28 and justifications for keeping this species in Festuca are presented. Key words: Poaceae, North American, Festuca, chromosomes, morphology, nomenclature. |
format |
Article in Journal/Newspaper |
author |
Aiken, Susan G. Fedak, George |
author_facet |
Aiken, Susan G. Fedak, George |
author_sort |
Aiken, Susan G. |
title |
Cytotaxonomic observations on North American Festuca (Poaceae) |
title_short |
Cytotaxonomic observations on North American Festuca (Poaceae) |
title_full |
Cytotaxonomic observations on North American Festuca (Poaceae) |
title_fullStr |
Cytotaxonomic observations on North American Festuca (Poaceae) |
title_full_unstemmed |
Cytotaxonomic observations on North American Festuca (Poaceae) |
title_sort |
cytotaxonomic observations on north american festuca (poaceae) |
publisher |
Canadian Science Publishing |
publishDate |
1992 |
url |
http://dx.doi.org/10.1139/b92-241 http://www.nrcresearchpress.com/doi/pdf/10.1139/b92-241 |
geographic |
Yukon |
geographic_facet |
Yukon |
genre |
Festuca brachyphylla Yukon |
genre_facet |
Festuca brachyphylla Yukon |
op_source |
Canadian Journal of Botany volume 70, issue 10, page 1940-1944 ISSN 0008-4026 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/b92-241 |
container_title |
Canadian Journal of Botany |
container_volume |
70 |
container_issue |
10 |
container_start_page |
1940 |
op_container_end_page |
1944 |
_version_ |
1785583031482843136 |