!!!Contents of APG 59(2) Acta Phytotax. Geobot., Volume 59 (2), July 2008 *Adjie B., M. Takamiya, M. Ohta, T. A. Ohsawa & Y. Watano **Molecular phylogeny of the lady fern genus ''Athyrium'' in Japan based on chloroplast ''rbcL'' and ''trnL''–''trnF'' sequences ....79 *Yahara, T. & H. Tsukaya **''Oxygyne yamashitae'', a new species of Thismiaceae from Yaku Island ....97 *Chaveerach, A., R. Sudmoon, T. Tanee & P. Mokkamul **The species diversity of the genus ''Piper'' from Thailand ....105 *Kaneko, S., N. Nakagoshi, Y. Isagi **Origin of the endangered tetraploid ''Adonis ramosa'' (Ranunculaceae) assessed with chloroplast and nuclear DNA sequence data ....165 Short Communication *Watanabe, K., T. Kobayashi & J. Murata **New and further chromosome number determinations in Japanese ''Arisaema'' ....175 *Tanaka, N. & T. Yukawa] **''Eria carinata'' (Orchidaceae), newly recorded from the Malay Peninsula ....179 New Names and Combinations ....182 Errata ....182 Published July 30, 2008 The Japanese Society for Plant Systematics