The new kenophyte in Poland - Lemna minuta Humb., Bonpl. and Kunth

Abstract

For the first time in Poland two habitats of <em>Lemna minuta</em> were found in 2007. Both of them are located in the warmest south-western region of the country. <em>L. minuta</em> is a North-American kenophyte which has come to Poland probably from Germany. This species grows no bigger than 1-3 mm, which makes it the smallest representative of genus <em>Lemna</em>. The most characteristic features of <em>L. minuta</em> are the lack of purple pigmentation and the presence of only one hardly visible vein in the frond.