Zennosuke Iwatsuki

Taxiphyllum barbieri, known as Java moss or Bogor moss, is a moss belonging to the family Hypnaceae. Native to Southeast Asia, it is commonly used in freshwater aquariums. It attaches to rocks, roots, and driftwood. In the wild, it grows in humid riparian areas. It was originally described as Isopterygium barbieri from Vinh, Vietnam.

Pseudotaxiphyllum is a genus of mosses belonging to the family Plagiotheciaceae. The genus has almost cosmopolitan distribution. Species: Pseudotaxiphyllum arquifolium (Bosch & Sande Lac.) Z.Iwats. Pseudotaxiphyllum densum Iwatsuki, 1987

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Mizutania is a genus of liverworts restricted to tropical Asia, and contains a single species Mizutania riccardioides. It is classified in the order Jungermanniales and is a member of the family Calypogeiaceae within that order. The genus name of Mizutania is in honour of Masami Mizutani (b.1930), who was a Japanese botanist (Bryology), who worked at the Hattori Botanical Laboratory. The genus was circumscribed by Tatsuwo Furuki and Zennoske Iwatsuki in J. Hattori Bot. Lab. vol.67 on pages 291 and 294 in 1989. They placed it in the monotypic family Mizutaniaceae.

Isopterygiopsis is a genus of mosses belonging to the family Plagiotheciaceae. The genus has cosmopolitan distribution. Species: Isopterygiopsis alpicola Hedenäs, 1988 Isopterygiopsis muelleriana Iwatsuki, 1970

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Pseudoditrichum is a rare North American genus of haplolepideous moss (Dicranidae). It is the only known genus in its family (Pseudoditrichaceae), and there is only one species in the genus. Pseudoditrichum mirabile has been found only in a small area along the Sloan River near Great Bear Lake. This is in the Northwest Territory in northern Canada, only a few kilometers south of the Arctic Circle. Pseudoditrichum mirabile is unusual in that the combination of the gametophyte features and the sporophyte morphology do not match any other moss family. The entire plant is a mere 3 mm tall,

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Hypnodontopsis is a genus of haplolepideous mosses (Dicranidae) in family Rhachitheciaceae. It contains the following species according to World Flora Online: Hypnodontopsis apiculata Z.Iwats. & Nog. Hypnodontopsis mexicana (Thér.) H.Rob. Hypnodontopsis spathulata H.Akiyama & At.Tanaka

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Ulota yakushimensis is a species of moss in the family Orthotrichaceae. It is native to Japan.

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Tayloria nepalensis is an extant dung moss species found in Nepal. It was first described by Zennoske Iwatsuki and William Campbell Steere in 1975.

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Podperaea krylovii is a species of moss in the genus Podperaea. Found in Asia, it was transferred to the genus Podperaea by Zennosuke Iwatsuki and Janice Mildred Glime.

Podperaea is a genus of Asian mosses in the family Hypnaceae. It was erected by Zennosuke Iwatsuki and Janice Mildred Glime.

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