PL
W tekście opisano nowo odnalezione stanowiska dwóch gatunków roślin wodnych chronionych w Polsce: kotewki orzecha wodnego Trapa natans L. i salwinii pływającej Salvinia natans (L.) All. położone kilkadziesiąt kilometrów na zachód i wschód od Krakowa. W obu przypadkach rośliny stwierdzono w zbiornikach wodnych pochodzenia antropogenicznego – stawach rybnych w okolicach Chrzanowa (kotewka orzech wodny) oraz na terenie zalanego wodą dawnego wyrobiska żwirowni w Zabierzowie Bocheńskim (salwinia pływająca)
EN
New localities of the rare water plants: Trapa natans L. and Salvinia natans (L.) All. in the Cracow environs are presented in this presentation. The plants were found: in a fishpond, which was impacted by mine waters from the Matylda mine in Chrzanów (Trapa natans) and in a gravel-pit reservoir in Zabierzów Bocheński (Salvinia natans). We found only two individuals of Trapa natans growing close together. The depth of the fishpond was ca. 80 cm. Plants were in good condition and generated flower’s buds (Figs 1 and 2). Trapa natans was associated with Ceratophyllum demersum and Myriophyllum spicatum. Salvinia natans (Fig. 3) was found in a reservoir in Zabierzów Bocheński (Fig. 4). A few clusters, with a dozen or so individuals in each, were observed. The species was accompanied by Myriophyllum spicatum. Moreover, at the shore line other waterside plants were observed, e.g.: Alisma plantago-aquatica, Eleocharis palustris, Typha latifolia, Berula erecta and Sparganium erectum. Localities of both plants are very rare, especially in southern Poland. Both localities are impacted by human activity. This indicates that anthropogenic impacted reservoirs should be monitored constantly and protected, because they might be habitats for rare and endangered species