Takasi Tuyama

Bulbophyllum kusaiense is a species of orchid in the genus Bulbophyllum from the Caroline Islands at elevations around 500 meters.

Bulbophyllum hatusimanum is a species of orchid in the genus Bulbophyllum from the Caroline Islands.

Bulbophyllum fukuyamae is a species of orchid in the genus Bulbophyllum.

Carex toyoshimae is a species of sedge native to Japan.

Metrosideros boninensis is a species of flowering plant in the family Myrtaceae. It is endemic to the Bonin Islands archipelago and is found exclusively on Chichijima Island, excepting for two remaining trees located on neighboring Anijima Island. M. boninensis is classified as 'endangered' in the Japanese Red Data Book and, although there were 326 plants recorded in 2004, genetic diversity of M. boninensis is extremely low. It is the northernmost species of the Metrosideros genus.

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Hernandia labyrinthica (Carolinian: oschal) is a species of tree in the family Hernandiaceae indigenous to Indonesia, New Guinea, the Solomon Islands, and the islands of Rota and Guam in Micronesia.

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Santalum boninense, commonly known as the Bonin sandalwood, is a species of tree in the family Santalaceae. It is found on the Bonin Islands in Japan. Its flowers are small, white and bell-shaped.

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