Asplenium serratipinnae (Aspleniaceae: Polypodiales), a New Allotetraploid Species in the A. normale Complex

Abstract

Asplenium serratipinnae (Aspleniaceae: Polypodiales), an allotetraploid species between the diploid race of A. normale and A. oligophlebium is described as new. It is endemic to Japan and morphologically most similar to A. normale, but differs in having narrower pinnae with an auriculate to hastate acroscopic base and deeply serrated margins.