@article{oai:u-ryukyu.repo.nii.ac.jp:02007136,
 author = {島袋, 敬一 and Shimabuku, Kei-ichi},
 issue = {17},
 journal = {琉球大学理工学部紀要. 理学編, Bulletin of Science & Engineering Division, University of Ryukyus. Mathematics & natural sciences},
 month = {Mar},
 note = {Although much study on the fern flora of the Ryukyu Islands has been done by many workers and valuable contributions have been made， our knowledge of the islets within the Ryukyus is not sufficient for analysis. The presnt work was commenced for the purpose of getting more accurate information in this field. As a result of the investion, fourteen families, twenty-eight genera and thirty-eight species were recorded for these islets. Among these thirty-two species occurred in Zamami (abbreviated Z in the list) and twenty-three in Yakabi (Y). The list of ferns on the islets has been based mainly on the author's collection (K. S.) in the Herbarium of the University of the Ryukyus. The following species are new additions to the flora of the Kerama Islands, Okinawa. Marsilea crenata Presl (Z) Ophioglossum petiolatum Hook. (Y) Lindsaea heterophylla Dry. (Z) Lindsaea tenera var. commixta (Tagawa) K. Iwatsuki (Z, ?Y) Nephrolepis hirsutula (Forst.) Presl (Z, Y) Arachniodes dimorphophylla (Hayata) Ching (Z) Arachniodes pseudo-aristata (Tagawa) Ohwi (Z) Ctenitis subglandulosa (Hance) Ching (Y) Diplazium subsniuatum (Wall.) Tagawa (Z) Dryopteris sordidipes Tagawa (Z) Thelypteris angustifrons (Miq.) Ching (Z, Y) Lepisorus uchiyamae (Mak.) H. Ito (Y), 紀要論文},
 pages = {43--50},
 title = {琉球列島付属小島嶼のシダ植物相　1. 座間味島・屋嘉比島},
 year = {1974}
}