Abstract
Six new taxa are describedfrom recent collections madefrom the Philippines (Mindoro, Mindanao), Borneo (Mt. Kinabalu), and Indonesia (Flores): Diphyscium buckii Tan, Disticho- phyllum noguchianum Tan, Gammiella touwii Tan, Hageniella hattoriana Tan, Mittenia plumula var. gigantea Tan, and Papillidiopsis koponenii Tan. A new section, Platyovatophyllum, is proposed in Distichophyllum to accommodate D. iwatsukianum Nog. and D. noguchianum. Gammiella tonkinensis (Broth. & Par.) Tan is a new combination and Stereodon tenuirameus Mitt. is recognized as a species of Brotherella. Mittenia plumula is both a new generic and species record for Borneo. Five new species and one new variety are rec- ognized among moss collections made recently from the Philippines, Borneo, and Flores. The continuous discovery of new taxa from the Malesian region shows that its rich and diverse moss flora is far from fully collected and understood. Five of the six new taxa described in this paper have not been found with sporophytes. In spite of this, they exhibit unique gametophytic characters worthy of taxonomic recognition. As a grateful gesture, I have christened the new taxa with names of colleagues who have been very supportive and helpful all these years to my study of the Malesian mosses.
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