Equisetum ×meridionale (Milde) Chiov. – a new hybrid taxon in the flora of Poland


Equisetum ×meridionale
new hybrid taxon
Western Beskids

How to Cite

Tlałka, D., Sliwinska, E., & Kruk, J. (2023). Equisetum ×meridionale (Milde) Chiov. – a new hybrid taxon in the flora of Poland. Biodiversity: Research and Conservation, 68, 9–14. https://doi.org/10.14746/biorc.2022.68.2

Number of views: 88

Number of downloads: 44


A new hybrid within the Hippochaete subgenus of Equisetum genus, Equisetum ×meridionale (Milde) Chiov. was discovered in Poland during the research conducted in 2022 at two locations in Kotlina Żywiecka (the Żywiec Basin) and Beskid Wyspowy (Island Beskids – Western Beskids) in the anthropogenic habitats in close proximity to Equisetum ramosis-simum. The identity of the hybrid was unequivocally confirmed by macro-morphological observations, microscopic analysis and flow cytometry. The most pronounced macroscopic characteristics of the hybrid were the intermediate size of the shoots and leaf sheaths, which are black with long black teeth. The microscopic observations revealed that the hybrid has silica tubercles in the form of cross-bands, similarly as in the case of E. ramosissimum, but not in the form of two rows as in the case of E. variegatum. The measurements of the nuclear DNA content (2C values) revealed that the putative hybrid had a nuclear DNA content intermediate to that of the parental species, i.e. E. ramosissimum (56.13 pg) and E. variegatum (63.80 pg) obtained in the present studies and within the values previously reported for E. ×meridionale (60.7-61.2 pg).



Bennert W., Lubienski M., Kötner S. & Steinberg M. 2005. Triploidy in Equisetum subgenus Hippochaete (Equisetaceae,Pteridophyta). Ann. Bot. 95: 807-815.10.1093/aob/mci084424673315710647. https://doi.org/10.1093/aob/mci084 DOI: https://doi.org/10.1093/aob/mci084

de Winter W. & de Somer N. 2021. Equisetum ×meridionale (Milde) Chiov. - een nieuwe paardestaartdbastaard voor Nederland. Gorteria - Dutch Botanical Archives 43: 16-23.

Doležel J., Greilhuber J., Lucretti S., Meister A., Lysak M. A., Nardi L. & Obermayer R. 1998. Plant genome size estimation by flow cytometry: Inter-laboratory comparison. Ann. Bot. 82(Suppl. A): 17-26. https://doi.org/10.1093/oxfordjournals.aob.a010312 DOI: https://doi.org/10.1093/oxfordjournals.aob.a010312

Hassler M. 2022. A complete, synonymic checklist of the Ferns and Lycophytes of the World. [https://www.worldplants.de/world-ferns/ferns-and-lycophyteslist]; access: 23.07.2022.

Jepson P., Lubienski M., Llewellyn P. & Viane R. 2013. Hybrids within Equisetum subgenus Hippochaete in England and Wales. New J. Bot. 3: 47-58. https://doi.org/10.1179/2042349712Y.0000000017 DOI: https://doi.org/10.1179/2042349712Y.0000000017

Kalinowski P., Sliwinska E. & Kruk J. 2016. Equisetum ×moorei Newman (Equisetaceae) - a 'new' nothotaxon in the Polish flora. Biodiv. Res. Conserv. 41: 11-18. https://doi.org/10.1515/biorc-2016-0003 DOI: https://doi.org/10.1515/biorc-2016-0003

Mirek Z., Piękoś-Mirkowa H., Zając A. & Zając M. 2020. Vascular plants of Poland. An annotated check-list. 526 pp. W. Szafer Institute of Botany, Polish Academy of Sciences, Kraków.

Obermayer R., Leitch I. J., Hanson L. & Bennett M. D. 2002. Nuclear DNA C-values in 30 species double the familial representation in pteridophytes. Ann. Bot. 90: 209-217. https://doi.org/10.1093/aob/mcf167 DOI: https://doi.org/10.1093/aob/mcf167

Prelli R. & Boudrie M. 2022. Les fougères et plantes alliées d'Europe. Biotop Editions.

Tlałka D. & Rostański A. 2012. Paprotniki Polski. Atlas i klucz. 128 pp. Wydawnictwo Kubajak, Krzeszowice.

Wróbel D. 2008. Skrzyp gałęzisty Equisetum ramosissimum Desf. In: Mirek Z. & Piękoś-Mirkowa H. (eds.). Czerwona Księga Karpat Polskich. Rośliny naczyniowe, pp. 31-33. Instytut Botaniki im. W. Szafera PAN, Kraków.

Wróbel D. 2013a. Przegląd krajowych mieszańców międzygatunkowych rodzaju Equisetum L. Acta Bot. Siles. 9: 67-73.

Wróbel D. 2013b. Equisetum ×robertsii T. D. Dines (E. arvense × E. telmateia; Equisetaceae) in Poland. Acta Bot. Silesiaca 9: 57-66.10.5586/aa.2004.023

Zając A. 1978. Założenia metodyczne "Atlasu rozmieszczenia roślin naczyniowych w Polsce". Wiad. Bot. 22: 145-155.

Zając A. & Zając M. (eds.). 2001. Distribution Atlas of Vascular Plants in Poland. xii+714 pp. Edited by Laboratory of Computer Chorology, Institute of Botany, Jagiellonian University, Cracow.