文献一覧: 植物地理・分類学会 = The Society for the Study of Phytogeography and Taxonomy (出版者)

47 0 0 0 OA 琉球列島奄美大島の絶滅危惧植物アマミヒイラギモチ(モチノキ科)の植物体サイズと葉の二型性

著者: Setoguchi Hiroaki Nakagawa Masaharu Momohara Arata 瀬戸口浩彰中川政治百原新
出版者: 植物地理・分類学会 = The Society for the Study of Phytogeography and Taxonomy
雑誌: 植物地理・分類研究 = The journal of phytogeography and taxonomy (ISSN:03886212)
巻号頁・発行日: vol.56, no.1, pp.7-11, 2008-09-30

The tree Ilex dimorphophylla Koidz.(Aquifoliaceae)is a vulnerable species that is endemic to the summit of Mt. Yuwan on Amamioshima Island, Japan. This plant hows characteristic leaf dimorphism, which increases its horticultural value, and many individuals have been illegally removed from the natural habitat. We examined the umber of shoots, leaf morphology and plant size of the species in the natural habitat. Based on field observation for two years, we found 84 shoots, of which 32(38.1%)had entire mature leaves, whereas 52(61.9%)had only serrate juvenile leaves. Majority of the examined shoots surveyed fell into the smallest size classes : < 100 cm in eight(ca. 45%)and < 25 mm in diameter at the trunk base(ca. 60%). Leaf dimorphism was clearly demarcated in trees at 130―210 cm in height and 15―27 mm in diameter at the trunk base.

2022-01-09 13:21:31
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3 0 0 0 OA 本州北部産キイチゴ属(バラ科) の1 新雑種

著者: 藤原陸夫阿部裕紀子
出版者: 植物地理・分類学会 = The Society for the Study of Phytogeography and Taxonomy
雑誌: 植物地理・分類研究 = The journal of phytogeography and taxonomy (ISSN:03886212)
巻号頁・発行日: vol.62, no.2, pp.69-73, 2015-03-31

2020-05-25 17:31:57
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1 0 0 0 OA オキタンポポは独立種である

著者: 芹沢俊介 Serizawa Shunsuke
出版者: 植物地理・分類学会 = The Society for the Study of Phytogeography and Taxonomy
雑誌: 植物地理・分類研究 = The journal of phytogeography and taxonomy (ISSN:03886212)
巻号頁・発行日: vol.55, no.1, pp.29-33, 2007-10-31

Taraxacum maruyamanum is a diploid dandelion endemic to the Oki Islands, western Japan. Morita(1995)regarded this dandelion as a subspecies of T. platycarpum. Taraxacum maruyamanum, however, is characterized by elongate, lanceolate or broadly lanceolate and hardly corniculate outer bracts of involucres. These characters are remarkably distant from the geographic trends of morphological variation in T. platycarpum s. lat. Taraxacum maruyamanum, therefore, should be treated as a distinct species.

2021-12-01 00:52:52
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1 0 0 0 IR 松前公園(北海道)のシロバナタンポポの核型

著者: 佐藤杏子竹内秀敏岩坪美兼佐藤杏子竹内秀敏岩坪美兼
出版者: 植物地理・分類学会 = The Society for the Study of Phytogeography and Taxonomy
雑誌: 植物地理・分類研究 (ISSN:03886212)
巻号頁・発行日: vol.59, no.2, pp.131-133, 2012-03

摘要北海道松前町の松前公園・龍雲院にはシロバナタンポポが生育している。シロバナタンポポは本州(関東・北陸以西),四国,九州に自生し,東北以北では松前公園だけに存在することから移入されたと考えられている。シロバナタンポポには,四倍体 (2n=32)と五倍体(2n=40)があり,五倍体には核型の異なる2型 (Type I, TypeⅡ)が存在することが知られていることから,松前公園のシロバナタンポポがどのタイプかを明らかにするために,種子から育てた2個体について染色体観察を行った。その結果,松前公園のシロバナタンポポは五倍体(2n=40)であり,核型はSato et al. (2011)で報告した五倍体の2つの型の内のType Iであることが判った。

2021-07-03 12:58:57
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1 0 0 0 IR グンバイヒルガオの海流散布の現状とその分布拡大

著者: 中西弘樹 Nakanishi Hiroki
出版者: 植物地理・分類学会 = The Society for the Study of Phytogeography and Taxonomy
雑誌: 植物地理・分類研究 (ISSN:03886212)
巻号頁・発行日: vol.58, no.2, pp.89-95, 2011-03

This study was undertaken to describe and discuss the dispersal by ocean currents and the distribution of Ipomoea pes-caprae in the Japanese mainland. Frequency and growth of the seedlings from the sea-borne seeds were observed in Nagasaki Prefecture where the tropical drift fruits and seeds were the most frequent in Japan except the Ryukyu Islands. Based on my field observations and new records, a distribution map was constructed. More than 500 seedlings from the sea-borne seeds are estimated every year on beaches of Japanese mainland beyond the producing area where the plant passes the winter and completes the life cycle. The distribution of the producing area is expanded to the north. This may be due to the global warming.