Bulletin of the Faculty of Life and Environmental Science Shimane University

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Bulletin of the Faculty of Life and Environmental Science Shimane University 15
2010-09-30 発行

A new sexual diploid of Dryopteris erythrosora complex (Dryopteridaceae)from Oki Islands, Japan

Iwatsuki, Kunio
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Description
A new sexual diploid of D. erythrosora complexwas discovered from the Oki Islands in Japan. Spores of this plant were observed and the meiotic chromosome number was confirmed to be n=41II(2x). This diploid plant differs from the two other endemic sexual diploid species in the D. erythrosora complex, D. caudipinna and D. koizumiana, in having pale-green indusia. This newly reported diploid plant will help inform the origin and diversity of agamosporous species within the D. erythrosora complexin Japan.