[article]
| Titre : |
The taxonomy, status and origin of Isoetes xbrochonii and I. creussensis (Isoetaceae), two Pyrenean endemic taxa |
| Type de document : |
texte imprimé |
| Auteurs : |
Daniel F. Brunton, Auteur ; Paul C. Sokoloff, Auteur ; Pere Aymerich, Auteur |
| Année de publication : |
2020 |
| Article en page(s) : |
pp. 391-408 |
| Langues : |
Anglais (eng) |
| Catégories : |
[Espèces (in biblio)] Isoëtes brochonii
|
| Mots-clés : |
pteridophyte |
| Résumé : |
"Isoetes brochonii has possibly been subject ta more taxonomie designations over the last century than any other European quillwort and l'J1ost commonly has been put into synonymy with the widespread I. lacustris. Investigations of herbarium and living material in the present study, however, indieate it to be a sterile (aborted spored) hybrid, I. xbrochonii (pro sp.), confined to high elevation lakes of the Pyrenees mountains in France, Spain and Andorra. This represents the first uniquely European Isoetes hybrid to be described. Putative parents are diploid I. echinospora and dodecaploid I. creussensis, probably a hybridogenic Pyrenean endemic. The speciation of I. creussensis may weil have occurred in Pyrenean refugia during Quaternary glacial-interglacial fluctuations. We found no convincing evidence for the occurrences of decaploid I. lacustris in the Pyrenees where it appears to have been confused with I. creussensis. A comparative table of the distinguishing morphologieal characteristies of I. creussensis and I. lacustris is provided, with megaspore ornamentation and microspore size indicated as being partieularly important indicators." (source : auteurs) |
| Type de publication : |
périodique |
| Référence biblio : |
Brunton D., Sokoloff P., Aymerich P., 2020 - The taxonomy, status and origin of Isoetes xbrochonii and I. creussensis (Isoetaceae), two Pyrenean endemic taxa. Botany letters, 167 (4) : 391-408. |
| ID PMB : |
69941 |
| Permalink : |
http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=69941 |
in Botany letters > vol. 167, n°4 (Année 2020) . - pp. 391-408
[article]
|
The taxonomy, status and origin of Isoetes xbrochonii and I. creussensis (Isoetaceae), two Pyrenean endemic taxa in Botany letters, vol. 167, n°4 (Année 2020)