!!!Contents of APG 57(2) Acta Phytotax. Geobot., Volume 57 (2), August 30, 2006 http://wwwsoc.nii.ac.jp/jsps/APG/APG57-2.jpg *Shiga, T., J. Ishii, Y. Isagi & Y. Kadono **''Nuphar submersa'' (Nymphaeaceae), a new species from central Japan ....113 *Sawa, S., H. Fukunaga & Y. Sawa **''Lecanorchis amethystea'' (Orchidaceae), a new species from Kochi Prefecture, Japan ....123 *Kuo, J., Z. Kanamoto, H. Iizumi & H. Mukai **Seagrasses of the genus ''Halophila'' Thouars (Hydrocharitaceae) from Japan ....129 *Kondo, K. & H. Shimai **Phylogenetic analysis of the northern ''Pinguicula'' (Lentibulariaceae) based on internal transcribed spacer (ITS) sequence ....155 *Aizawa, M. & M. Kaji **Taxonomic revision of ''Picea alcoquiana'' var. ''reflexa'' (Pinaceae) based on cone morphology ....165 *Setoguchi, H., D. Fujita, K. Kurata, Y. Maeda & C.-I. Peng **Comparison of leaf and floral morphology among insular endemics of ''Pieris'' (Ericaceae) on the Ryukyu Islands and Taiwan ....173 *Kawase, D. & T. Yumoto **Clonal structure and genetic differentiation in the serpentine plant ''Japonolirion osense'' (Petrosaviaceae) using AFLP markers ....183 Published August 30, 2006 The Japanese Society for Plant Systematics