Asplenium platyneuron, a new pteridophyte for Europe
alien species, Appalachian Asplenium complex, Central Europe, ferns, long distance dispersal, serpentines, Slovakia
Eleven plants of Asplenium platyneuron (ebony spleenwort) were found in disturbed serpentine woodland in south-central Slovakia (Central Europe). This find represents a newaddition to the fern flora of Europe. It is probably the result of long-distance spore dispersal. The nearest known sites for this species are those in eastern North America, about 6500km away. The important determina- tion characters of A. platyneuron are described, the Slovakian locality characterized and an over- view of the ecology and a map of the worldwide distribution of this species provided.