Expansion of the liverwort Tetralophozia setiformis in the Polish Tatra Mts [Western Carpathians]

The article presents the spread of the liverwort Tetralophozia setiformis in the Polish Tatra Mts (Western Carpathians). In the years 1814-1957 only four localities of this plant have been found in High Tatra Mts. Since the 90-ties, an increase in recording of T. setiformis has been noticed, including the first locality in Western Tatra Mts. Currently, there are 17 localities of T. setiformis in the Polish Tatra Mts. In many of them, the plant occurs abundantly; it also remains in the places of its first records. The species has a narrow ecological scale. It is attached to rock blocks, mostly of north exposition. It creates small, single-species turfs plaited in mossy pillows of alpine grasslands of Oreochloo distichae-Juncetum trifidi racomitrietosum lanuginosi hung among rocks.