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$Rhododendron Society of Canada Soci6t6 \ Canadienne du Rhododendron$

$Bulletin 1978 Soci6t6 \ Canadienne du Rhododendron$

$Rhododendron Society of Canada Soci6t6 \ Canadienne du Rhododendron$

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Page 4 CHEJU, ANOTHER TREASURE ISLAND OF PLANTS Hideo Suzuki Saitama-ken, JaPan Cheju lsland of the Republic of Korea lies in the northern tip of the East China Sea. tt has long been known as the habitat of over 1700 different plant species' The island has many things in common with Japan's Yakushima lsland, another treasure island of plants, irom which come the famous R. yakusimanum and R' keiskei'Yaku Fairy'. The similarities are that the coast line is almost sub-tropical. lt rains every two days and is very humid. Mt. Halla (1950 metres), soaring high in the sky, is the nijhest peak in Korea. Mt. Kuromi on Yakushima lsland is the highest peak in th-e Kyushu District of Japan. Both islands are rich in plants, dwarf ones in particular. These facts had long lured Mr. Warren Berg and me to visit cheiu' The time to realize our long cherished wish finally came and on May 22nd,1976' Warren and his wife Pat, from Seattle, USA, joined me and we departed for a week's trip to the island. Greeting us at the cheju Airport were several of our Korean friends. some of them came all the way from the mainland, requiring over 20 hours to come by both train and boat. Among them were Mr- K. Kim and Mr. N. Kim, both members of the Japanese Rhododendron Society, Mr. Fu, a local botanist and author of 'The Natural Resources of Cheju lsland'lor the government and Dr. c. Miller who has built his own arboretum near seoul' with friends and porters, our party became quite a large one. we ascended Mt. Halla and spent four days in the wild. For Mr. Fu, the expert on Cheju plants it became his 358th ascent. SeveraI decadeS ago, Dr' Nakai, a Japanese botanist, reported concerning Rhododendron distribution on Mt. Halla as follows: R. mucronulatum; R. mucronulatum var. ciliatum; R. mucronulatum var- cilatum dwarf form (synonym R. taquetii); R. mucronulatum var. ciliatum dwarf white form; F. daurtiium, R. weyrichii; R- weyrichli var' psl/ostyllum; R' poukhanense; R. chrysanthum (syn. R. aureum) and R' saisuense' Up to 700 m in elevation, R. poukhanense and R. weyrichii are the main species' R. poukhanense forms twiggy compact mounds as if trimmed by men. This habit is quite different from the one grown on the mainland which is apt to be erect' Especially at around 1400 metres which is its upper limit, it becomes extremely compact, and grows side by side with R. mucronulatum var. ciliatum dwarf form' At'a glance both are so compact it is almost difficult to distinguish one from the other. The variation of the flowers of R' poukhanense is very rich and some even have deeperStripesonthelobes.Fl'weyrichiiisdifferenthereinco|ourfromthat grown in Japan. While in Japan the ipecies has typical brick red flowers, Cheju's varietybearsmostlypurpIish-pinkones'A|thoughthereisaIimitedareain Kyushl, Japan where the purplish-pink form grows, it is cons-idered a very rare form. A conspicuous feature is thatthe floweicolour ranges from pale to deep' The fiterature *e naue sav" n weyrichii var. psl/osfyllum is supposed to have hairs on the lower p"rt oi the style. what we observed, however, was that the beautiful sitvery-wniie hairs grow on the ovary, not on the lower part of the style.
Page 1 and 2: {'ie* /&r\ Rhododendron Society of
Page 3 and 4: 'ZV t'll'l oueluo' uo16ur;rng'peou
Page 5: 'pualle ol palp uopuol aql ut slequ
Page 9 and 10: Page 6 GROWING RHODODENDRONS IN AUS
Page 11 and 12: Page 8 from the Forests Commission
Page 13 and 14: Page 10 is the ambition of the grou
Page 15 and 16: *, Page 12 PRUNING OF RHODODENDRONS
Page 17 and 18: Page 14 Before judging commences th
Page 19 and 20: Page 16 The above program of soir f
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Page 37 and 38: 0AZ N08 erlocs pôN 'uoricunr iospu
Page 39 and 40: euAyqy ue1 6ulleJ Illlenb '7g 6u;1e

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