著者

Hiroshi Takahashi Tomohisa Yukawa Masayuki Maki

出版者

The Japanese Society for Plant Systematics

雑誌

Acta Phytotaxonomica et Geobotanica (ISSN:13467565)

巻号頁・発行日

vol.72, no.3, pp.265-274, 2021-10-31 (Released:2021-11-27)

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Petrosavia amamiensis (Petrosaviaceae) is described as a new species from Amami-Oshima Island, Kagoshima Prefecture, Japan. The plants were previously identified as P. sakuraii. The flowers of P. amamiensis are autonomously self-pollinated at the beginning of anthesis, while those of P. sakuraii are self-pollinating at a later stage of anthesis. Petrosavia amamiensis has a shorter aerial stem, shorter internodes, more densely flowered inflorescence and smaller seeds than P. sakuraii. Moreover plastid and nuclear DNA differ greatly between P. amamiensis and P. sakuraii.

著者

Koji Takayama Chie Tsutsumi Dairo Kawaguchi Hidetoshi Kato Tomohisa Yukawa

出版者

The Japanese Society for Plant Systematics

雑誌

Acta Phytotaxonomica et Geobotanica (ISSN:13467565)

巻号頁・発行日

vol.70, no.3, pp.149-158, 2019-10-31 (Released:2019-11-28)

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Liparis hostifolia (Orchidaceae) on Minami-iwo-to Island in the Bonin (Ogasawara) Archipelago was rediscovered for the first time in 79 years during a field survey in 2017. Its identity was confirmed by morphological comparison and DNA extractions from herbarium specimens collected between 1914 and 1938. Results from the molecular phylogenetic analyses demonstrated that L. hostifolia belongs to the L. makinoana complex. In comparison with other members of the L. makinoana complex, the broadly ovate labellum, short dormancy period, and flowering from November to March are unique characteristics of L. hostifolia. Results from the molecular phylogenetic analyses also suggested that L. hostifolia has had a long-isolated history in the Bonin Archipelago and probably migrated from temperate East Asia.

著者

Hiroshi Hayakawa Kenji Suetsugu Shohei Fujimori Takuto Shitara Jun Yokoyama Tomohisa Yukawa

出版者

The Japanese Society for Plant Systematics

雑誌

Acta Phytotaxonomica et Geobotanica (ISSN:13467565)

巻号頁・発行日

vol.71, no.2, pp.163-169, 2020-06-30 (Released:2020-07-31)

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A new peloric form of Cephalanthera erecta (Thunb.) Blume (Orchidaceae) is reported from Hokkaido, Honshu, and Shikoku, Japan. Cephalanthera erecta f. pelorica Hiros. Hayak. & Suetsugu has an inconspicuous lip and stigmas positioned at the apex of the column. The flowers of C. erecta f. pelorica resemble those of the probable peloric form of C. erecta (i.e., C. erecta var. oblanceolata N. Pearce & P. J. Cribb, C. nanlingensis A. Q. Hu & F. W. Xing) and C. longifolia (L.) Fritsch. f. conformis Suetsugu & Hiros. Hayak. However, C. erecta f. pelorica can be distinguished from C. erecta var. oblanceolata, which has a swollen organ on the abaxial surface of the column apex (vs. no swollen organ); C. nanlingensis, which has two staminodes (vs. five staminodes), and C. longifolia f. conformis, which has elliptic, coriaceous leaves (vs. lanceolate, papyraceous leaves).

著者

MICHIHISA TAKASHIMA JUN'ICHI HASEGAWA TOMOHISA YUKAWA

出版者

日本植物分類学会

雑誌

Acta Phytotaxonomica et Geobotanica (ISSN:13467565)

巻号頁・発行日

vol.67, no.1, pp.61-66, 2016-02-29 (Released:2017-03-21)

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Oreorchis coreana Finet, discovered in Nasushiobara-shi, Tochigi Prefecture, Honshu, is a new addition to the flora of Japan. Until now, Oreorchis coreana was thought to be endemic to Jeju Island, Korea. This finding is a remarkable case of disjunct distribution.

著者

Chie Tsutsumi Ayako Maeda Atsushi Abe Yumi Yamashita Tomohisa Yukawa Satoshi Kakishima

出版者

National Museum of Nature and Sciece (National Science Museum, Tokyo)

雑誌

国立科学博物館研究報告B類(植物学) (ISSN:18819060)

巻号頁・発行日

vol.47, no.3, pp.131-141, 2021-08-20 (Released:2021-08-31)

参考文献数

24

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The taxonomy of Japanese Oberonia, particularly O. makinoi, has been confusing. Molecular analyses of Japanese Oberonia, including plants called “O. makinoi,” were performed. Phylogenetic trees deduced from the nuclear internal transcribed spacer (ITS) region, the plastid matK with trnK introns, and single-nucleotide polymorphisms (SNPs) data derived from MIG-seq show that “O. makinoi” collected from Shikoku and Kyushu is distinctive from the other species of Oberonia. The plants called “O. makinoi” differ from O. japonica in the leaf size and the flowering season. Furthermore, samples from the Ryukyus (Okinawa and Amami Islands) appear conspecific with, or closely related to “O. makinoi.” The taxonomic treatment of Japanese Oberonia requires further analyses using samples collected from central Japan and comparison to congeners in neighboring areas, particularly in Taiwan, where similar species are distributed.

著者

Tomohisa Yukawa Tomoko Takamiya Mu Mu Aung Khin Myo Htwe Nobuyuki Tanaka

出版者

National Museum of Nature and Sciece (National Science Museum, Tokyo)

雑誌

国立科学博物館研究報告B類(植物学) (ISSN:18819060)

巻号頁・発行日

vol.48, no.3, pp.71-77, 2022-08-22 (Released:2022-08-22)

参考文献数

18

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A new orchid species, Dendrobium popaense T.Yukawa & Nob.Tanaka is described from Mt. Popa, central Myanmar. It is discriminated from the closely related D. bensoniae by its smaller size in perianth lobes, its higher ratio of the length of mentum to dorsal sepal, and its conspicuously papillate operculum. From D. jinghuanum, the new species is separable by its lack of purple floral pigmentation, its lemon-yellow disk of labellum, its smaller size in perianth lobes, its higher ratio of the length of mentum to dorsal sepal, and its short, erect stem.

著者

CHIE TSUTSUMI TOMOHISA YUKAWA NAM-SOOK LEE CHANG-SHOOK LEE MASAHIRO KATO

出版者

The Japanese Society for Plant Systematics

雑誌

Acta Phytotaxonomica et Geobotanica (ISSN:13467565)

巻号頁・発行日

vol.59, no.3, pp.211-218, 2008-11-28 (Released:2017-03-21)

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Plants recognized as Liparis koreana (Nakai) Nakai ex W.T. Lee (Orchidaceae) in Japan and Korea is morphologically distinct from the type specimen of that species in the following points: flowers sparsely arranged (vs. closely arranged in the type); apex of anther cap mucronate (vs. beaked), lateral sepals twisting and enfolding the lip (vs. extending to the apex of the lip). Since these plants do not correspond with any known species, it is described as a new species, Liparis koreojaponica. The taxonomic status of L. koreana is reviewed.

著者

CHIE TSUTSUMI TOMOHISA YUKAWA MASAHIRO KATO

出版者

The Japanese Society for Plant Systematics

雑誌

Acta Phytotaxonomica et Geobotanica (ISSN:13467565)

巻号頁・発行日

vol.59, no.1, pp.73-77, 2008-03-25 (Released:2017-03-21)

参考文献数

8

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A new species, Liparis purpureovittata (Orchidaceae), is described from central and northern Japan on the basis of both morphological and molecular characters. This species is distinguishable from the closely related Liparis kumokiri in the abruptly dilated labellum (vs. the gradually dilated labellum in L. kumokiri), the labellum recurved strongly in the middle (vs. the labellum strongly recurved in both the middle and distal part), and the column with rounded marginal wings (vs. angular marginal column wings).