| Budget Amount *help |
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2003: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 2002: ¥1,900,000 (Direct Cost: ¥1,900,000)
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| Research Abstract |
Tropical rainforest is known as an ecosystem showing the richest species diversity of land plants on the Earth, however our knowledge for the diversity is still poor except for some economically important groups such as timber trees. Especially the taxonomic studies for giant herbs like Musaceae, Araceae or Zingiberaceae are not enough probably because of the difficulties in preparation of specimens, even thought they are highly diversified including some useful species in the tropical rainforests. In the present study we focused on the family Zingiberaceae of Borneo.
We mainly analyzed the specimens newly collected by ourselves from the Lambir Hills, Borneo and deposited at Kyoto University. And we made herbarium surveys for historical collections visiting herbaria in Austria, Denmark, Malaysia, Netherlands and the UK.
Among four subfamilies of Zingiberaceae, we treated all three subfamilies distributed in Borneo. In Alpinioideae of the Lambir Hills, we recognized six genera 23 species excluding 12 species of Amomum which was published in the previous study, and of which four species were new to science. In Etlingera inundata, one of the new species, showed floral dimorphism uncommon in Zingiberaceae. In Zingiberoideae of the Lambir Hills we recognized three genera 12 species, of which four species and one variety were new to science. We examined the inflorescence morphology of Boesenbergia in detail and discussed the relationships between the inflorescence morphology and the way of anther dehiscence. For Tamijioideae, a monotypic and isolated subfamily comprising a single species of which distribution has been believed to be restricted to a small area in Borneo, we found a new locality in the course of herbarium surveys. We prepared the keys for all species of each genus of Bornean Zingiberaceae.
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