@article{oai:ir.kagoshima-u.ac.jp:00008172,
 author = {TAGAWA, Hideo and UESATO, Kenji and SAKATA, Yusuke and KUNIMOTO, Tadamasa and TANAKA, Takayuki},
 issue = {1},
 journal = {南海研紀要},
 month = {2016-10-28},
 note = {1. For the study on the distribution and ecology of rhododendrons growing in
Papua New Guinea, ten quadrats of various sizes were placed on diverse habitats; 3
on the cliffs made by the road excavation, 1 in the Nothofagus forest, 3 in the Miscanthus grassland with shrubs in places, 2 in the Themeda grassland with scattered
shrubs, and 1 on the site of a landslide., 2. Plenty of rhododendron seedlings were found on the wet excavated faces
along the road. The wet faces were almost covered with bryophytes, and there was
no bryophyte carpet on the dry faces and no rhododendron seedling. It is uncertain
where the source of seed supply of these rhododendrons was, but it is quite natural
to think that they come from the adjacent forest epiphyte rhododendrons if there is no
terrestrial seed source near by. On the landslide site there was a dense mat of bryophytes on the floor in the open Rh.inconspicuum scrub, but rhododendron seedlings were never found., 3. In the Nothofagus forest on Mt.Kaiap the following three species of rhododendrons were found as epiphyte; Rh.phaeochitum, Rh.dielsianum and Rh.sp. The
height of epiphyte position on the trunk was from the ground level to 20m. Epiphyte
seedlings and adults were frequently found below 10m on the trunk where they can
receive radiation much better than on the floor. We never found the terrestrial
rhododendron in the midst of forests but at forest edges., 4. On the ground in the low grassland dominated by Themeda australis there
were many seedlings of rhododendrons; Rh.zoelleri in the quadrat PNG-6 and Rh.aurigeranum in PNG-10. In the tall grassland of Miscanthus floridulus, however, the seedlings of predominant rhododendrons were seldom found on the ground. This
may be because the tall grassland suffers from intermittent fires made by the local
people, and adult rhododendrons except the fire-resistant species are burnt., 5. No rhododendron species has ever been found in kunai (Imperata cylindrica)
grassland. This is because the kunai is a pioneer stage in a subsere originating directly from the abandonment of gardens., 6. Discussion was given on the origin of terrestrial rhododendrons from epiphytic
ones through the facultative species whose growth habit is changeable between terrestrial and epiphytic growth in the woodland environment like New Guinea., 7. We suggest that the growth pattern of rhododendrons in relation to the plant
succession is as follows: Seedlings produced in the short grassland grow up to become
shrub as the grassland develops into tall grassland, but the shrubby rhododendrons
disappear from the floor as this tall grassland develops into a forest. In the forest rhododendrons can grow only on the trunks of trees.},
 pages = {123--160},
 title = {Distribution and Ecology of Malaysian Rhododendrons in Papua New Guinea},
 volume = {2},
 year = {}
}