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)

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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)

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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)

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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)

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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

Yukihiro H. Kobayashi Shizuka Fuse Minoru N. Tamura

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.1, pp.1-17, 2019-02-28 (Released:2019-03-09)

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To evaluate the evolutionary relationships among species of Peperomia subg. Micropiper, a phylogenetic analysis based on the DNA sequences of plastid regions atpB-rbcL, psbK-I, rpL16, rpS16, trnG, trnK (including matK), trnL-L-F, and trnS-G was conducted using 20 species, in addition to four outgroup species. The trnK sequences of 46 species and trnL-L-F sequence of one species were quoted from GenBank and also included in the analysis. The results showed that P. subg. Micropiper includes seven major clades, which are also supported by morphological characteristics. They are recognized as sectionequivalent plant groups, namely Alatoid, Blandoid, Glabelloid, Glaucoid, Japonicoid, Lanceolatoid, and Rotundifolioid. A chromosome analysis of the subgenus yielded nine new counts: 2n = 22 (diploid) for P. alata, P. bicolor, P. diaphanoides, P. flexicaulis, P. hylophila, P. polystachya and P. prosterata, 2n = 44(tetraploid) for P. okinawensis and 2n = 132 (dodecaploid) for P. reticulata. Japonicoid, which occurs outside the Americas, i.e. in Asia, Africa, and the Pacific islands, is tetraploid, decaploid, and dodecaploid (not diploid), while the remaining six plant groups are native to the Americas and diploid (except Glaucoid, which is tetraploid). Further, P. diaphanoides is conspecific with P. glabella. Peperomia boninsimensis from the Ogasawara Islands, Japan, is more closely related to Polynesian species than to other Japanese species. Peperomia okinawensis should be regarded as a variety of P. japonica.

著者

Akiyo Naiki Takenori Yamamoto Aya Hasegawa Tao Fujiwara Katsuhiro Yoneoka Atsushi Ebihara

出版者

The Japanese Society for Plant Systematics

雑誌

Acta Phytotaxonomica et Geobotanica (ISSN:13467565)

巻号頁・発行日

vol.74, no.2, pp.131-133, 2023-07-31 (Released:2023-09-08)

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Hymenophyllum pilosissimum C. Chr. (Hymenophyllaceae), recently discovered on Iriomote Island, is reported for the first time in Japan.

著者

KENJI SUETSUGU

出版者

The Japanese Society for Plant Systematics

雑誌

Acta Phytotaxonomica et Geobotanica (ISSN:13467565)

巻号頁・発行日

vol.66, no.3, pp.193-196, 2015-10-31 (Released:2017-03-24)

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Flowering individuals of an unknown species of Gastrodia were discovered on Yakushima Island, Japan. While those plants were somewhat similar to Gastrodia fontinalis, they had shorter inflorescences, a shorter perianth tube and different number of ridges on the labellum, a combination of characteristics remarkably similar to those of G. uraiensis, which was considered to be endemic to Taiwan. Given that there were only minor differences between the original description of G. uraiensis and the plants on Yakushima Island, it was concluded that they were the same species. They represent the first known occurrence of G. uraiensis outside of Taiwan.

著者

JIN MURATA SUGONG WU KAZUYUKI SASAMURA TETSUO OHI-TOMA

出版者

The Japanese Society for Plant Systematics

雑誌

Acta Phytotaxonomica et Geobotanica (ISSN:13467565)

巻号頁・発行日

vol.65, no.3, pp.161-176, 2014-10-31 (Released:2017-03-21)

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The taxonomic treatment of Arisaema (Araceae) in China in volume 23 of the Flora of China (FOC) in 2010 recognized 78 species in 12 sections. The circumscription of the sections was revised by Murata in 2011 and the names of the sections were reviewed more recently by Murata et al. in 2013. In the FOC the circumscription of some species was changed drastically and four new species were described. Notes on the treatment in the FOC are given, based on recent cytological and molecular data, according to the sections recognized by Murata et al. in 2013.

著者

Seita T. Watanabe Kazuhiko Hayashi Katsuro Arakawa Shizuka Fuse Hidetoshi Nagamasu Hiroshi Ikeda Atsushi Kuyama Piyakaset Suksathan Manop Poopath Rachun Pooma Yong-Ping Yang Minoru N. Tamura

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.179-204, 2021-10-31 (Released:2021-11-27)

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Based on molecular phylogenetic evidence, phylogenetic analyses of both cpDNA and nrDNA sequences based on 76 (cp) and 77 (nr) samples representing 64 species, two subspecies, and three (cp) and two (nr) varieties of Lilium and six (cp) and five (nr) samples from Cardiocrinum, Fritillaria, and Notholirion as outgroups were used to better understand relationships within Lilium and to revise its infrageneric classification. The same individuals were used for both cpDNA and nrDNA analyses to avoid confusion caused by genetic polymorphism within a species. Nine thousand eight hundred thirty seven bp from 10 cpDNA regions and 1069 bp from the nuclear (ITS + ETS) regions were analyzed. The same twelve clades were formed in Lilium in both the chloroplast and nuclear trees (one clade of the former tree and one clade of the latter tree were not strictly formed because of low resolution). In light of the cpDNA and nrDNA trees obtained, 13 morphological characters, including a pair of marginal ridges along a central groove on the adaxial surface of the tepals were examined with attention given for the first time to the use of this character as having diagnostic value. The morphological evidence supported the twelve clades. Based on molecular and morphological evidence, a revised infrageneric classification of Lilium recognizing twelve clades as twelve sections is proposed.

著者

Hiroki Nakanishi

出版者

The Japanese Society for Plant Systematics

雑誌

Acta Phytotaxonomica et Geobotanica (ISSN:13467565)

巻号頁・発行日

vol.73, no.1, pp.19-33, 2022-02-28 (Released:2022-03-25)

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Flowering and dispersal phenology, characteristics of fruits, seed shape, and seed and embryo sizes were studied in orchids in the warm temperate zone of Japan. Anemochorous potential was estimated based on the ratio of seed length to embryo length. The data obtained were compared among different life forms: epiphyte, saprophyte (myco-heterotroph), summer green terrestrial and evergreen terrestrial or- chids. The epiphytes, which had the smallest seeds, had the poorest dispersibility. On the other hand, the saprophytes, which had elongated seeds, had excellent dispersibility. Seed size and dispersibility of ter- restrial orchids ranged between those of epiphytes and saprophytes. Most epiphytes had hygroscopic trichomes, which contributed to the release of the seeds from capsule. It was clarified that seed morphol- ogy and dispersal mechanisms in orchids were closely related to their life form.

著者

Satoko Iida 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.73, no.1, pp.77-80, 2022-02-28 (Released:2022-03-25)

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The parentage of the Potamogeton hybrids P. ×nomotoensis Kadono & T. Noguchi and P. ×yamaga- taensis Kadono & Wiegleb (Potamogetonaceae) was studied by analyzing the plastid-encoded rbcL gene and nuclear-encoded internal transcribed spacer (ITS) from the hybrids and putative parents. The results showed P. ×nomotoensis to be a hybrid between P. natans and P. maackianus and P. ×yamagataensis a hybrid between P. natans and P. oxyphyllus. The latter is the first documentation of a hybrid between diploid and tetraploid species in Japan.

著者

HIROSHI OKADA HIROKAZU TSUKAYA MOTOHARU OKAMOTO

出版者

The Japanese Society for Plant Systematics

雑誌

Acta Phytotaxonomica et Geobotanica (ISSN:13467565)

巻号頁・発行日

vol.54, no.1, pp.69-75, 2003-06-09 (Released:2017-03-23)

参考文献数

13

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Cayratia japonica showed intra-specific polyploidy of x=20, i.e., 2n=40 (diploid) and 60 (triploid). Individuals with 2n=40 produced fruits, and formed 20 bivalents at metaphase I in meiosis, but their pollen fertilities widely varied from about 30 to 90%. Individuals with 2n=60 did not produce any fruits, formed a variable number of trivalents, bivalents and univalents at metaphase I, and showed low pollen fertilities of less than 30%. The possible occurrence of some genetic types for pollen development in diploids is discussed.

著者

Kenji Suetsugu Akiyo Naiki Yayoi Takeuchi Hironori Toyama 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.68, no.2, pp.123-126, 2017-06-30 (Released:2017-09-12)

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Two new localities of the mycoheterotrophic plant, Sciaphila alba (Triuridaceae), are reported and the description of its morphology, in particular on color polymorphism of staminate flowers, based on a new collection from Tatau, Sarawak and from herbarium studies at KYO is updated. Sciaphila alba had been reported only from Lambir Hills National Park, Sarawak, Borneo.

著者

Yasuro Kadono Satoko Iida

出版者

The Japanese Society for Plant Systematics

雑誌

Acta Phytotaxonomica et Geobotanica (ISSN:13467565)

巻号頁・発行日

vol.73, no.1, pp.57-65, 2022-02-28 (Released:2022-03-25)

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Species-level identification of aquatic plants, such as duckweeds (Lemnaceae), can be challenging due to reduced morphological features and high phenotypic plasticity. A taxonomic study of sect. Uninerves of the genus Lemna in Japan based on morphological observations and DNA analyses is reported. Two non- indigenous species, L. minuta and L. valdiviana, were confirmed to occur in Japan. Excessively small, enigmatic plants of Lemna apparently specialized to grow in spring-fed waterbodies was determined to be a form of L. minuta. It could not be concluded whether the miniature Lemna represents an ecotype adapted to cool water or an example of phenotypic variation under low temperature conditions.

著者

Ai Nagahama Shuichiro Tagane Meng Zhang Nguyen Van Ngoc Hoang Thi Binh Truong Quang Cuong Hidetoshi Nagamasu Hironori Toyama Kojin Tsuchiya 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.72, no.3, pp.275-280, 2021-10-31 (Released:2021-11-27)

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A new species of Claoxylon (Euphorbiaceae), C. langbiangense, from Bidoup-Nui Ba National Park, Lam Dong Province, southern Vietnam, is described and illustrated. It resembles C. longifolium of Cambodia, NE India, Indonesia, Laos, Malaysia, Papua New Guinea, Thailand and Vietnam, but is distinguished by its serrate-dentate leaf margin, larger staminate flowers and shorter pistillate inflorescences. A vernacular name, preliminary conservation status for the species, and a key to the species of Claoxylon in Vietnam is also provided.

著者

Shuichiro Tagane Souladeth Phetlasy 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.72, no.3, pp.253-264, 2021-10-31 (Released:2021-11-27)

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Two new species of Lauraceae, Beilschmiedia bolavenensis and Machilus champasakensis, are described and illustrated based on specimens from the Bolaven Plateau, southern Laos, and Lindera annamensis, Litsea ferruginea, L. lanceifolia, L. pseudoelongata, L. verticillata, Machilus angustifolia, and M. robusta (all Lauraceae) are reported for the first time for the flora of Laos. Voucher specimens, photographs, ecological information, and taxonomic notes are provided for each species.

著者

Kenji Suetsugu Destario Metusala Yuda Rehata Yudistira

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.1, pp.67-72, 2021-02-28 (Released:2021-03-21)

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A new locality of Lecanorchis nigricans from West Java, Indonesia, is reported, and a description based on the Javanese material is provided. Since L. nigricans was known previously from Japan, Taiwan, Fujian (China) and Thailand, this discovery represents the southernmost occurrence of the species. Based on the chasmogamous flowers, spatulate sepals and petals, and cucullate lip, these plants should be L. nigricans var. yakushimensis among the three varieties of L. nigricans. Considering that species of Lecanorchis are easily overlooked in the wild due to their short flowering season and dwarf habit, L. nigricans may be more widely distributed in Southeast Asia.

著者

Chung-Kun Lee Shizuka Fuse Minoru N. Tamura

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.193-198, 2017-10-31 (Released:2017-11-24)

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Commelina, the pantropical and largest genus in Commelinaceae, consists of ca. 205 species with characteristic conduplicate involucral bracts. Previous phylogenetic studies of Commelina, which mainly used African and North American species, suggested that the ancestral character state of the margins of the involucral bracts of Commelina was free and that free to fused occurred only once. To test this evolutionary scenario, we performed parsimony and likelihood analyses with partial matK sequences using 25 individuals from 11 species of Commelina, primarily from eastern and southeastern Asia, with Aneilema and Pollia as outgroups. Results showed that Commelina comprises two major clades, one consisting of four species, and the other consisting of seven species. Species with free margins of the involucral bracts were in both major clades: C. suffruticosa in the first clade and C. coelestis, C. communis, C. diffusa, C. purpurea and C. sikkimensis in the latter. The phylogenetic trees suggested that the number of shifts is fewer when the ancestral state was fused and that there were two parallel evolutionary trends toward free.

著者

TETSUKAZU YAHARA 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.59, no.2, pp.97-104, 2008-07-30 (Released:2017-03-21)

参考文献数

39

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A new species of Oxygyne (Thismiaceae), O. yamashitae, a saprophytic/mycoheterotrophic species from Yaku Island, Kagoshima Prefecture, Japan, is described and illustrated. The combination of characters such as three stamens attached to the perianth and the presence of lamellae at the mouth of the perianth tube indicate that it belongs to the genus Oxygyne. It is clearly distinct from other known species of Oxygyne in having an elliptic hole in the corona, in which stamens are inflexed, and in having three dichotomous appendages below the stigma. The discovery of O. yamashitae demonstrates that the lowland evergreen forest in Yaku Island is a hotspot of endemic plants and worthy to be conserved.

著者

NARUMI NAKATO 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.53, no.2, pp.153-160, 2002-12-27 (Released:2017-03-23)

参考文献数

26

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We report the somatic chromosome numbers of Plagiogyria adnata, P. yakushimensis, and a putative hybrid between them. The chromosome number of P. adnata was determined to be 2n=260 (tetraploid, x=65) and 2n=325 (pentaploid, a new count). In P. yakushimensis, two cytotypes, 2n=260 (tetraploid) and 2n=390 (hexaploid), are reported for the first time. A pentaploid individual with 2n=c. 325 is considered to be a hybrid between P. adnata and P. yakushimensis, based on cytology and leaf morphology. The present study indicates that sympatric populations of the two species have cytologically and morphologically diversified as a result of polyploidization and hybridization.