著者
Toshio Katsuki
出版者
The Japanese Society for Plant Systematics
雑誌
Acta Phytotaxonomica et Geobotanica (ISSN:13467565)
巻号頁・発行日
vol.69, no.2, pp.119-126, 2018 (Released:2018-06-30)

A new species, Cerasus kumanoensis T. Katsuki (Rosaceae), sp. nov., is described from the southern Kii Peninsula, Japan. It is similar to C. jamasakura var. jamasakura and C. leveilleana because the corymbose inflorescences and extended peduncle are identical in these three taxa. However, C. kumanoensis is distinguished by several morphological and phenological characteristics, an earlier flowering period, narrowly ovate and smaller leaf blade (4–8 cm long, 1.8–3.6 cm wide) and glabrous petiole and pedicel.
著者
Kenji Suetsugu Hirokazu Fukunaga
出版者
The Japanese Society for Plant Systematics
雑誌
Acta Phytotaxonomica et Geobotanica (ISSN:13467565)
巻号頁・発行日
vol.69, no.1, pp.63-67, 2018 (Released:2018-03-02)

Here we describe a new variety of the mycoheterotrophic genus Lecanorchis, L. triloba J. J. Sm. var. clausa Suetsugu & Fukunaga, discovered during a botanical survey in Okinawa Island, Ryukyu Islands, Japan. The new variety resembles Lecanorchis triloba var. triloba due to its densely flowered rachis and small fruits. However, the new variety differs in that it has complete cleistogamous flowers and a nonrecurved and narrowly triangular midlobe of the lip.
著者
Kenji Suetsugu Takaomi Sugimoto
出版者
The Japanese Society for Plant Systematics
雑誌
Acta Phytotaxonomica et Geobotanica (ISSN:13467565)
巻号頁・発行日
vol.69, no.1, pp.69-74, 2018 (Released:2018-03-02)

We report three new localities of the mycoheterotrophic plant Sciaphila corniculata (Triuridaceae) from Ishigaki Island, Ryukyu Islands, Japan. Previously, S. corniculata was reported only from Kolombangara Island (Solomon Islands), Waigeo Island (New Guinea) and Obi and Aru islands (the Moluccas). We also update a description of its morphology, in particular on stylar characteristics based on new materials. A key to the Japanese species of Sciaphila based on total flower and stylar characteristics is also provided for easy identification of these rare mycoheterotrophic plants.
著者
Kenji Suetsugu Phetlasy Souladeth Shuichiro Tagane Tetsukazu Yahara
出版者
The Japanese Society for Plant Systematics
雑誌
Acta Phytotaxonomica et Geobotanica (ISSN:13467565)
巻号頁・発行日
vol.69, no.2, pp.139-141, 2018 (Released:2018-06-30)

A new locality of Lecanorchis taiwaniana from Nam Ha National Protected Area, Luang Namtha Province, northern Laos is reported and a description of the species based on the Laos material is provided. Lecanorchis taiwaniana was known previously only from Japan and Taiwan. Considering that species of Lecanorchis are easily overlooked in the wild due to their short flowering season and dwarf habit, it is possible that L. taiwaniana is more widely distributed.
著者
Kenji Suetsugu Alberto Bruno Izai Sabino Kikuchi Monica Suleiman Hirokazu Tsukaya
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.68, no.2, pp.117-121, 2017 (Released:2017-09-12)

Several new populations of the mycoheterotrophic orchid Kalimantanorchis nagamasui from Sabah, Borneo, Malaysia, are reported. The species was previously considered endemic to West Kalimantan, Borneo, Indonesia. Given that the continued discovery of new species and distributional records of mycoheterotrophic plants have been made from only a limited number of surveys in a small selection of sites, it is likely that further surveys in Borneo will reveal additional occurrences. The description of the morphology, in particular on the underground parts and size variation, of K. nagamasui is also updated.
著者
IMANISHI AYUMI KANEKO SHINGO ISAGI YUJI IMANISHI JUNICHI NATUHARA YOSIHIRO MORIMOTO YUKIHIRO
出版者
日本植物分類学会
雑誌
APG : Acta phytotaxonomica et geobotanica (ISSN:13467565)
巻号頁・発行日
vol.66, no.1, pp.1-9, 2015-02-27

We analyzed the population genetic structure of Euryale ferox Salisb. (Nymphaeaceae), an annual aquatic herb, to obtain information useful for conservation of this species. A total of 391 plants from 58 populations throughout Japan and four plants from a population in China were sampled and genotyped using eight microsatellite markers. Within- and among-population genetic diversity of E. ferox in Japan was basically low, with all eight microsatellite loci fixed to single alleles in many populations. However, multilocus genotypes including heterozygous loci were detected from three populations; these populations had inbreeding coefficients (F_<IS>) not equal to 1.0 and it is assumed that these multilocus genotypes are produced by outbreeding of genetically different individuals. Principal coordinate analysis (PCO) and population genetic structure analysis using INSTRUCT software uncovered at least two genetically distinct groups within Japanese E. ferox populations, neither of which had a simple geographical distribution pattern. This complex genetic structure may be the result of a random fixation of MLGs through genetic drift after habitat loss and by spatial and temporal admixture among populations through seed dispersal and seed banks.
著者
IWASAKI TAKAYA TONO AKITAKA AOKI KYOKO SEO AKIHIRO MURAKAMI NORIAKI
出版者
日本植物分類学会
雑誌
Acta phytotaxonomica et geobotanica : APG (ISSN:13467565)
巻号頁・発行日
vol.61, no.1, pp.1-20, 2010-06-30
被引用文献数
1

A phylogeographic study of two species of Carpinus, C. japonica Blume and C. tschonoskii Maxim. (Betulaceae), based on the distribution patterns of their chloroplast DNA haplotypes, is reported. In Japan, these species are mainly distributed in Pacific-type deciduous broad-leaved forests. Using 439-440 and 627-629bp nucleotide sequences of noncoding regions of chloroplast DNA, we detected 5 and 6 haplotypes among 217 and 181 individuals sampled from 52 and 49 populations of C. japonica and C. tschonoskii, respectively. The geographic distribution patterns of the haplotypes were highly structured. We investigated the common phylogeographic patterns between the two species that would indicate the influence of common historical factors such as climate change since the last glacial maximum (LGM). Based on our results, we concluded that the Pacific-type Japanese deciduous broad-leaved forests were split into at least three refugia during the LGM. After the LGM, the species expanded to northern areas or moved to higher altitudes from each refugium, thus now occupying northeastern, central, and southwestern Japan.
著者
Yuki Wakasugi Hiroshi Azuma (Present Name: Suzuki) Akiyo Naiki Sachiko Nishida
出版者
The Japanese Society for Plant Systematics
雑誌
Acta Phytotaxonomica et Geobotanica (ISSN:13467565)
巻号頁・発行日
vol.68, no.3, pp.129-144, 2017 (Released:2017-11-24)

Geranium yesoense (Geraniaceae) includes several varieties that are mainly discriminated by two morphological features, namely, the degree of leaf incision and the density of spreading hairs on the sepals, but these features have never been objectively quantified. To clarify whether these features can truly discriminate varieties, we analyzed leaf shape and sepal pubescence, and conducted a molecular phylogenetic analysis using nuclear and chloroplast DNA. Our morphological analyses showed some trends in leaf morphology and density of hairs, but failed to identify any groupings that could be clearly distinguished on the basis of these features. Our molecular analysis recognized G. yesoense as a distinct taxon, but did not support the existence of subgroups within the species. We conclude that G. yesoense must be treated as a single taxon with some tendency toward morphological variation depending on locality and habitat.
著者
Kenji Suetsugu Arief Hidayat Hirokazu Tsukaya
出版者
The Japanese Society for Plant Systematics
雑誌
Acta Phytotaxonomica et Geobotanica (ISSN:13467565)
巻号頁・発行日
vol.69, no.2, pp.135-137, 2018 (Released:2018-06-30)

The discovery of a new locality of the mycoheterotrophic Gastrodia spathulata (Orchidaceae) in West Java, Indonesia, during herbarium studies in BO is reported. This species was previously considered an endemic species in Mt. Kinabalu, Sabah, Borneo.
著者
Kohtaroh Shutoh Shingo Kaneko Takahide Kurosawa
出版者
The Japanese Society for Plant Systematics
雑誌
Acta Phytotaxonomica et Geobotanica (ISSN:13467565)
巻号頁・発行日
vol.68, no.3, pp.181-192, 2017 (Released:2017-11-24)

Pyrola subaphylla (Pyroleae, Ericaceae), which generally produces reddish scapes and scale-like or extremely small leaves, has been treated as a variety or form of the closely related P. japonica, which generally has green scapes and fully developed leaves, owing to observations of individuals with intermediate morphology. Recently, these two taxa were shown to differ genetically, supporting recognition of P. subaphylla as a distinct species. We identified herbarium specimens as P. subaphylla when (1) at least three shoots were mounted on the same sheet, (2) leaf blades <3.0 cm in length were present on all mounted shoots, and (3) at least one flowering shoot either lacked ordinary leaves, which are distinguished from scale-like leaves with blade >1 cm long, or bore only a single ordinary leaf. A revised taxonomic treatment of the species is proposed. In Japan, P. subaphylla occurs in Hokkaidō, Honshū (Tōhoku and Chūbu district), and Shikoku, usually in coniferous forests at 0–1,500 m.
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)

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
HORI KIYOTAKA EBIHARA ATSUSHI NAKATO NARUMI MURAKAMI NORIAKI
出版者
日本植物分類学会
雑誌
APG : Acta phytotaxonomica et geobotanica (ISSN:13467565)
巻号頁・発行日
vol.66, no.1, pp.47-57, 2015-02-27

The Dryopteris varia complex (subg. Erythrovariae, sect. Variae Fraser-Jenk.) is an apogamous fern complex. Most species of the complex are apogamous triploids; Dryopteris saxifraga and D. varia, the only known diploid sexual cytotypes in the complex, are insufficient to account for the morphological and genetic variation within the complex. In this study, we describe a new diploid sexual species, Dryopteris protobissetiana K. Hori et N. Murak., from southern Yakushima, and discuss its morphological characteristics, reproductive mode, and chromosome number. Dryopteris protobissetiana is similar to D. bissetiana in having slightly bullate scales and a dark green lamina surface, but it differs in having flat, serrate margins at the apex of the upper pinnae. Dryopteris protobissetiana is a sexual diploid with 2n=82, and may be a source of the genetic variation in the apogamous complex.
著者
KUO JOHN KANAMOTO ZIYUSEI IIZUMI HITOSHI MUKAI HIROSHI
出版者
日本植物分類学会
雑誌
APG : Acta phytotaxonomica et geobotanica (ISSN:13467565)
巻号頁・発行日
vol.57, no.2, pp.129-154, 2006-08-30
被引用文献数
2

A taxonomic study of the seagrass genus Halophila Thouars concludes that eight distinct taxa, including four new species, occur in Japanese waters. Past literature indicated that the name of H. ovata Gaud. is illegitimate, thus a new species name, H. gaudichaudii J. Kuo, with a description is provided. Halophila major (Zoll.) Miq. has been reinstated to a distinct taxon, with H. euphlebia Mak. as a synonym. The other three new species, H. nipponica J. Kuo, H. mikii J. Kuo, and H. okinawensis J. Kuo are endemic to Japan, while H. gaudichaudii, H. ovalis (R. Br.) Hook. f., H. major, H. minor (Zoll.) den Hartog and H. decipiens Ostenf. are extended from Indo-West Pacific regions to reach their northern distributional boundaries in southern Japan. Halophila okinawensis and H. gaudichaudii are restricted to Ryukyu Islands and H. mikii only occurs in Tanegashima and Yakushima Islands. Halophila nipponica is widely distributed in temperate Japan except for Hokkaido Island, while the tropical H. major has additional colonies confined to Wakayama Prefecture in Honshu and Tokushima and Kochi Prefectures in Shikoku. Typifications, morphological descriptions, habitat and biological information, illustrations and distribution maps are presented for each taxon. Biogeographical distribution of the Japanese species is discussed in relation to the effect of currents.
著者
TAMURA MINORU N.
出版者
日本植物分類学会
雑誌
APG : Acta phytotaxonomica et geobotanica (ISSN:13467565)
巻号頁・発行日
vol.59, no.1, pp.15-29, 2008-03-25

The taxonomy of Polygonatum in Japan is revised. Nine species, four nothospecies, including P. ×desoulavyi (= P. desoulavyi var. yezoense = P. miserum), P. ×domonense and P. ×azegamii (= P. desoulavyi var. azegamii), and six varieties are recognized. Desoulavy 142 is superseded by Desoulavy 143 (both in LE) as a lectotype of P. ×desoulavyi. It is presumed that P. ×desoulavyi, P. ×domonense and P. ×azegamii are hybrid derivatives between P. humile and P. involucratum, between P. involucratum and P. lasianthum, and between P. falcatum and P. involucratum, respectively. Polygonatum amabile is considered to be a species distinct from P. lasianthum, as in Yatabe's original species concept. Polygonatum trichosanthum is reduced to var. trichosanthum under P. falcatum. A key to the species, nothospecies and varieties is provided.
著者
Hiroyuki Akiyama
出版者
The Japanese Society for Plant Systematics
雑誌
Acta Phytotaxonomica et Geobotanica (ISSN:13467565)
巻号頁・発行日
vol.68, no.3, pp.145-174, 2017 (Released:2017-11-24)

Phylogenetic relationships among the members of the epiphytic genus Yakushimabryum H. Akiyama et al. and related genera (Pylaisiadelphaceae) were studied using cpDNA (rbcL, rps4, and trnL-F) gene sequences as well as morphological features. Present analyses (1) suggested the presence of three clades in the Pylaisiadelphaceae and Sematophyllaceae (Pylaisiadelphaceae s. str., Sematophyllaceae s. str. + Heterophyllioideae, and Clastobryum), and (2) confirmed the distinctive generic status of Yakushimabryum from other members of the family. One new genus Orientobryum H. Akiyama and two new species O. ovalifolium H. Akiyama and Y. brevigemmium H. Akiyama were recognized and described. In addition, a close inter-relationship of Pseudotrismegistia undulata (Broth. & Yasuda) H. Akiyama & Tsubota and Heterophyllium amblystegum (Mitt.) J. Yu et al. (= Mastopoma subfiliferum Horik. & Ando) was confirmed. Four new combinations, O. oligonema (Cardot & P. de la Varde) H. Akiyama (≡ Clastobryum oligonema Cardot & P. de la Varde), Y. subintegrum (P. Tixier) H. Akiyama (≡ Aptychella subintegra P. Tixier), Y. tonkinense (Broth.) H. Akiyama (≡ Clastobryum tonkinense Broth. & Paris), and Pseudotrismegistia amblystega (Mitt.) H. Akiyama (≡ Stereodon amblystegus Mitt.) were proposed.
著者
Kaori Horii Takashi Yamanouchi Yasuro Kadono
出版者
The Japanese Society for Plant Systematics
雑誌
Acta Phytotaxonomica et Geobotanica (ISSN:13467565)
巻号頁・発行日
vol.68, no.2, pp.111-116, 2017 (Released:2017-09-12)

Potamogeton ×tosaensis Kadono, Horii & Yamanouchi (Potamogetonaceae) is described here as a new hybrid. Although similar to P. octandrus, it is morphologically distinguishable in several traits. Most conspicuous of these are the connate stipules and fusiform turion bearing one acerose leaf. The plants were found only in and around Kochi City, Shikoku. Potamogeton octandrus and P. pusillus are the putative parents.
著者
Hidenori Nakamori Miki Tomita Hiroshi Azuma Takehiro Masuzawa Toru Tokuoka
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.68, no.2, pp.83-92, 2017 (Released:2017-09-12)

Miscanthus (Poaceae) comprises about 20 species, of which seven species and two forms occur in Japan. There is controversy whether M. condensatus is a separate species or a variety or subspecies of M. sinensis. To determine its taxonomic status, we conducted a molecular phylogenetic analysis using DNA sequences of the atpB-rbcL, psbC-trnS(UGA), rpl20-rps12, trnL(UAA)-trnF(GAA), trnS(GGA)- trnT(UGU), and nuclear ITS regions, and the Adh1 gene from 31 samples of the seven Japanese species of Miscanthus. The neighbor-joining (NJ) tree based on the cpDNA sequences shows that M. condensatus and M. sinensis share two haplotypes, and that the nuclear ITS and Adh1 sequences of the two species are identical, making it difficult to distinguish M. condensatus from M. sinensis based on DNA sequences. The evidence indicates that hybridization between the two species has proceeded rapidly, or that M. condensatus is derived from a diverging lineage of M. sinensis. The status of M. condensatus remains controversial, but our findings support provisionally treating M. condensatus as the infraspecific taxon, M. sinensis var. condensatus.
著者
SUZUKI TAKESHI WATANABE IWAO SHIRAIWA TAKUMI
出版者
日本植物分類学会
雑誌
APG : Acta phytotaxonomica et geobotanica (ISSN:13467565)
巻号頁・発行日
vol.56, no.1, pp.71-83, 2005-04-11
被引用文献数
2

Samples of the aquatic floating fern Azolla japonica and its relatives (sect. Azolla) growing in 73 localities of Japan were analyzed by allozyme electrophoresis. Six allozyme types were recognized: AW, BW, BZ, TA, TO and YA types. Compared to the International Rice Research Institute (IRRI) accessions of Azolla by allozymes, the BZ and BW types had the same allozyme patterns as those of A. caroliniana and an artificial hybrid Azolla, respectively; It was supposed that both types had escaped from Azolla introduced to Japan for agricultural use on rice fields. The YA and AW types had very similar allozyme patterns to those of A. filiculoides and A. microphylla, respectively. The TA and TO types shared all allozyme bands except one. The TA and TO types were suggested to be closely related to A. rubra by allozyme comparison. Morphologically, it was suggested that numbers of septa in glochidia (spikelets on male massulae) differentiates the TA type from A. rubra, although only one sample of the TA type was observed. The TA (and possibly TO) type might be an independent species of genus Azolla, or true A. japonica.
著者
NAGAMASU HIDETOSHI KATO MAKOTO
出版者
日本植物分類学会
雑誌
APG : Acta phytotaxonomica et geobotanica (ISSN:13467565)
巻号頁・発行日
vol.55, no.2, pp.75-78, 2004-08-25

A new species, Nothapodytes amamianus Nagam. & Mak. Kato, is described from Amami-oshima, the Ryukyu Isls., and information on its pollination biology is presented. Nothapodytes amamianus is closely related to N. nimmonianus (J. Graham) Mabb., which is widely distributed from S. India to the Ryukyus (Yaeyama group), but is distinguished from the latter by the base of the leaves truncate or shortly cordate, the larger flowers with petals 7-9mm long, and the short but prominent anther connective. This new species is restricted to a small area on Amami-oshima and should be categorized as critically endangered. A key to the Japanese species of Nothapodytes is provided.
著者
ODA JIRO NAGAMASU HIDETOSHI
出版者
日本植物分類学会
雑誌
Acta phytotaxonomica et geobotanica : APG (ISSN:13467565)
巻号頁・発行日
vol.61, no.3, pp.145-150, 2011-02-21

Carex noguchii J. Oda & Nagam. is described as new to science. It is similar to C. biwensis Franch. in having irregularly trigonous to pentagonous culms, many-flowered (ca. 30) spikes, and short (1.8-2.0mm long) perigynia. Carex noguchii is distinguished from the latter, however, by the dark brown basal leaf sheaths, wider and longer leaves, orbicular-ovoid perigynia, and achenes loosely enclosed by the perigynia, and micromorphologically by the absence of satellite bodies.