A Specimen List of Hymenophyllaceae of Seram and Ambon collected on Indonesian-Japanese botanical expeditions 1983–1986

This is a list of specimens of Hymenophyllaceae collected in Seram and Ambon from 1983 to 1986. The first two sets of specimens of this family are kept in TI and BO; the third more or less incomplete set will be in L, with a few more duplicates to be distributed to other herbaria. In tatal, 47 species of the Hymenophyllaceae are recorded. Seram has an area of about 17,000 km2 with many mountain peaks reaching 2,000 to 3,000 m elevation, the highest being 3019 m tall. When the collections were made in 1980s, most mountainous areas were still natural and undeveloped, covered mostly with primary forests. Mountains over 1500 m elevation are in a cloud zone of mossy forests where filmy ferns prefer to grow. For the species enumerated here, the habitat of each species is summarized and edited from the field notes on the collection labels. There are widespread calcareous on Seram Island, and most collections are from such areas. Ambon is a much smaller island located southwest of Seram. The flora of Ambon had been relatively better known than Seram’s because of the epoch-making pre-Linnean work of G. E. Rumphius, Herbarium Amboinense. However, the island is now well populated and has been deforested. A small number of Hymenophyllaceae were collected on Ambon. On Seram Island, no particular species of filmy fern grow obligatory in limestone areas. For the epiphytic species, calcareous habitats appear to be of less concern. The epipetric species cited in the following list usually grow on very wet, often moss-covered limestone as facultative calcareous species.