Carex ×kneuckeri, a hybrid new for central Europe and neotypification of this name

Abstract

Carex ×kneuckeri (C. hirta × C. rostrata) is reported here for the first time to occur in southeastern Poland and central Europe. Although both parents are widespread and common species in Europe, the hybrid is extremely rare or overlooked, worldwide only known from France (one locality), Sweden (two localities) and now also Poland (one locality). Carex ×kneuckeri has the general appearance of C. rostrata, but has hairy utricles and hairy leaf sheaths, like C. hirta. Phylogenetic analysis of plastid matK and (cloned) nuclear ribosomal ITS sequences indicates a close relationship of C. ×kneuckeri with C. rostrata. The ITS alignment shows complex mutational patterns and a clear dominance of the C. rostrata sequence type, but also an indication of the presence of the C. hirta sequence type. As no original material of C. ×kneuckeri could be traced, a specimen from the Swedish Museum of Natural History (S) is chosen here as the neotype for this name.

Hybrids of monocots in the flora of Ukraine: Preliminary synopsis

“…Thus, new hybrids were described from Romania (Anghelescu et al, 2021) and Poland (Szczepaniak et al, 2016). Some authors recorded the findings of hybrids in Romania (Dulugeac et al, 2019;Řepka & Mendel, 2022), Hungary (Mesterházy et al, 2017), Slovakia (Bernátová, 2008;Koopman et al, 2021), Poland (Paszko & Nobis, 2010;Więcław, 2014;Nowińska et al, 2014;Kobierski et al, 2018;Koopman et al, 2019), etc.…”

Carex × takhtadjanii (Carex diluta × C. distans; Cyperaceae), a new hybrid for the flora of Ukraine

“…However, there has never been given any information about the presence and distribution of hybrids of this genus for the flora of Ukraine, though Koopman (2022) mentioned 295 Carex hybrids for Europe. Moreover, Carex hybrids are known from all neighbouring countries of Ukraine, except Moldova, namely: Poland (Ceynowa-Gieldon, 1993;Więcław, 2014;Więcław & Wilhelm, 2014Kobierski et al, 2018Koopman et al, 2019), Slovakia (Dostál, 1989;Dostál & Červenka, 1992;Bernátová, 2008;Jiménez-Mejías et al, 2014;Więcław, 2014;Koopman, van Beusekom, et al, 2021), Hungary (Koopman, 2022), Romania (Więcław, 2014;Koopman, 2022), Russia (Egorova, 1999;Jiménez-Mejías et al, 2014;Elven et al, 2017;Koopman, 2022) and Belarus (Dubovik et al, 2012(Dubovik et al, , 2017. Therefore, it is easy to assume that such discoveries of Carex hybrids are only a matter of time for the territory of Ukraine.…”