Kunio Iwatsuki

Didymoglossum tahitense, syn. Microglossum tahitense is a fern native to Polynesia, the East Indies, Fiji, and Queensland in Australia. It is in the family Hymenophyllaceae, and is unusual in having peltate leaves. These are sessile on the rhizome.

Bolbitis appendiculata is a lithophyte in the family Dryopteridaceae, seen in evergreen forests. It is found in India, Sri Lanka, Bangladesh, Borneo, Myanmar, Cambodia, China, Hong Kong, Japan, Java, Malaysia, Philippines, Sumatra, Taiwan, Thailand and Vietnam. Fronds are dimorphic, scaly beneath and hairy above. Sterile lamina dark green and simply pinnate, stalked, oblong, serrate with larger pinnae in the middle, reduced towards both ends. Fertile lamina narrower, elliptic, obtuse and base unequal. Dark brown to black sporangia covers almost the entirety of the underside of the leaf

Hymenophyllum nephrophyllum, commonly known as the kidney fern, is a filmy fern species native to New Zealand. It commonly grows on the forest floor of open native bush. Individual kidney-shaped fronds stand about 5–10 cm tall. In hot weather they shrivel up to conserve moisture, but open up again when the wet returns. This species has very thin fronds which are only four to six cells in thickness. In the Māori language they are also called raurenga. A specific example of occurrence of H. nephrophyllum is within forested areas of Westland, New Zealand, where it occurs with other fern species

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Abrodictyum caudatum is an epiphytic fern, found in rainforests in eastern Australia.

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Vandenboschia boschiana, synonym Trichomanes boschianum, also known as the Appalachian bristle fern or Appalachian filmy fern, is a small delicate perennial leptosporangiate fern which forms colonies with long, black creeping rhizomes.

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