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.

著者

Hiroshi Noda Jun Yamashita Shizuka Fuse Rachun Pooma Manop Poopath Hiroshi Tobe 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.71, no.2, pp.103-128, 2020-06-30 (Released:2020-07-31)

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Dioscorea (Dioscoreaceae) is a diverse genus of more than 600 species. To understand relationships and character evolution within the genus, 273 samples from 183 species (including 28 newly sequenced species) based on four cpDNA regions were analyzed phylogenetically. The phylogenetic tree obtained comprised eleven well-supported major clades, most of which further consisted of more than two subclades. Comparisons with previously proposed infrageneric taxa (23 to 58 sections and associated ‘genera’) showed that some sections/‘genera’ are monophyletic and others polyphyletic. As in previous studies, ‘D. sect. Stenophora’ was sister to the rest of the genus. The present analyses of character state distribution on the tree confirmed that ‘D. sect. Stenophora’ is characterized by having rhizomes, monosulcate pollen and a diploid chromosome number based on x = 10 (plesiomorphies), whereas the rest of the genus has tubers and bisulcate pollen (apomorphies), but is diverse in regard to chromosome number, stem twining direction, fruit types and seed wing morphology. Based on molecular and morphological evidence, two subgenera, Dioscorea (= ‘D. sect. Stenophora’) and Helmia, are proposed. For subgenus Helmia, a revision of the infrageneric classification, especially for the species in the Old World, is needed.

著者

Kenji Suetsugu Hiroshi Hayakawa

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.49-55, 2019-02-28 (Released:2019-03-09)

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A new variety, Goodyera schlechtendaliana Rchb. f. var. yakushimensis Suetsugu & Hiros. Hayak. (Orchidaceae), from Yakushima and Okinawa, is described. It is distinguished from G. schlechtendaliana var. schlechtendaliana by a combination of morphological characters, such as straighter lateral sepals, straighter lip, sparsely hairy inside the concave-saccate hypochile, and slender leaves.

著者

Shinji Fujii Yoshinori Tokuoka 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.71, no.3, pp.231-242, 2020-10-31 (Released:2020-11-29)

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Saxifraga fortunei sensu lato (Saxifragaceae) varies greatly in morphology and includes many infraspecific taxa. As many as five varieties have been recognized in western Japan, although their discrimination based on leaf size or leaf shape, such as cuneate base or degree of lobing is often difficult to determine due to continuous variation. To quantify the variation in leaf morphology, especially focusing on cuneate and parted leaves, 259 samples from 87 populations in western Japan were subject to principal component analysis. Additionally, developmental changes in plants from three selected populations were examined. The findings revealed that plants with parted leaved (var. suwoensis) were discriminated from plants with cuneate and normal leaves, while plants with cuneate leaves (var. obtusocuneata) were within the range of variation of var. fortunei. Leaf shape changes from cuneate to truncate or cordate during the transition from a vegetative state to the flowering state. Cuneate forms usually occurred in sterile plants, but also on flowering plants even within a population. This characteristic was less useful for recognizing var. obtusocuneata. Populations with parted (long lobed) leaves as well as those with cuneate leaves usually grow along streams, confirming that phenotypes are the result of adaptive differentiation toward becoming facultative rheophytes, as previously suggested.

著者

Kenji Suetsugu Shingo Kaida Hirokazu Fukunaga Shinichiro Sawa

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.3, pp.243-248, 2020-10-31 (Released:2020-11-29)

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A new color variant of Lecanorchis japonica Blume, L. japonica f. lutea (Orchidaceae), is described from Kagoshima and Chiba prefectures, Japan. Lecanorchis japonica f. lutea differs from L. japonica f. japonica only by its brilliant yellow coloration. Additionally, L. japonica f. lutea is superficially similar to L. hokurikuensis f. kiiensis but differs in having widely open flowers (vs. barely open flowers) and a nearly entire column wing (vs. apparent projections below column wing).

著者

Shinji Fujii

出版者

The Japanese Society for Plant Systematics

雑誌

Acta Phytotaxonomica et Geobotanica (ISSN:13467565)

巻号頁・発行日

vol.67, no.2, pp.123-126, 2016-06-30 (Released:2016-12-20)

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Cyperus pacificus (Ohwi) Ohwi var. margoinflatus S. Fujii, a new variety of C. pacificus (Cyperaceae) is described. It closely resembles C. pacificus var. pacificus in the oblong-ellipsoid achenes with winged margins, but the margins are well inflated with spongy parenchyma. It usually occurs in the dried bottoms of irrigation ponds, and often intermixed with other species of Cyperaceae such as C. extremiorientalis Ohwi, C. nipponicus Franch. et Sav. var. nipponicus and var. spiralis Ohwi, Fimbristylis dipsacea (Rottb.) C.B. Clarke, and F. squarrosa Vahl var. esquarrosa Makino. A key to the new variety and closely related taxa is also provided.

著者

Michio Wakabayashi Hiroshi Takahashi Sho Tomita

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.41-51, 2018-02-28 (Released:2018-03-02)

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A new species, Chrysosplenium suzukaense, from the northern part of the Yoro Mountains and Suzuka Mountain Range, Central Honshu, Japan, is described. Chrysosplenium suzukaense belongs to ser. Macrostemon, and is most similar to C. fauriei in the C. fauriei group (C. fauriei, C. kiotense and C. nagasei) distributed on the Sea of Japan side of Japan. However, C. suzukaense differs from C. fauriei in always having four stamens opposite the calyx lobes (vs. eight stamens), and smaller stature and flowers. The distribution of C. suzukaense is nearer the Pacific Ocean side, but in an area of much snow in winter, showing climatic conditions similar to the Sea of Japan side. The rosette-like basal leaves retained until end of the flowering time in C. suzukaense and the C. fauriei group may be an adaptation to the Sea of Japan side environment, especially to a much snow. The chromosome number, representing the karyotype, of C. suzukaense was confirmed to be 2n=22, and similar to other members of the C. fauriei group.

著者

Riku Nakamasu Shota Sakaguchi Hiroaki Setoguchi

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.1, pp.73-76, 2020-02-29 (Released:2020-03-17)

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A set of 8 polymorphic EST-SSR markers has been developed to evaluate the genetic diversity and genetic structure of the populations of Tricyrtis sect. Tricyrtis (Liliaceae) in Kyushu, which reproduces sexually and asexually by bulbils. The total number of alleles for each locus ranged from 2 to 11 with an average of 5.5, while the values of observed and expected heterozygosity ranged from 0.043 to 0.875 and 0.043 to 0.849, respectively. The combined probabilities of identity (PI = 6.0E-07 and PI-Sib = 2.7E-03) of these markers suggest that they are useful for not only evaluating genetic diversity but also for estimating clonal diversity within populations. Cross-species amplification was evaluated for three phylogenetically related species, T. macropoda, T. setouchiensis, and T. affinis, to show that all the EST-SSR markers are transferrable among these species.

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).

著者

TAKAYA IWASAKI AKITAKA TONO KYOKO AOKI AKIHIRO SEO NORIAKI MURAKAMI

出版者

The Japanese Society for Plant Systematics

雑誌

Acta Phytotaxonomica et Geobotanica (ISSN:13467565)

巻号頁・発行日

vol.61, no.1, pp.1-20, 2010-06-30 (Released:2017-03-21)

参考文献数

35

被引用文献数

1

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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

TAKASHI YAMASAKI KEICHI OZEKI NORIYUKI FUJII MARI TAKEHARA MASASHI YOKOGAWA SHINGO KANEKO YUJI ISAGI

出版者

The Japanese Society for Plant Systematics

雑誌

Acta Phytotaxonomica et Geobotanica (ISSN:13467565)

巻号頁・発行日

vol.63, no.3, pp.107-120, 2013-04-05 (Released:2017-03-21)

参考文献数

73

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Silene kiusiana (Caryophyllaceae) is an endangered perennial herb of semi-natural grasslands in Japan and Korea. To elucidate the genetic status of S. kiusiana in the Aso region, Kyushu, Japan, in which relatively large populations still remain, we analyzed the genetics of seven populations of S. kiusiana using five novel microsatellite markers. Each population of S, kiusiana has maintained relatively high genetic diversity (mean H_E = 0.791 and mean N_A =12.0). In addition, the values of pairwise F_<ST> indicating the degree of genetic differentiation among populations were significantly larger than zero between all pairs of populations, although the degrees of difference were small. The semi-natural grasslands in the Aso region have decreased in size over the past several decades, and thus habitat fragmentation may have caused genetic differentiation among populations of S. kiusiana. Although the populations of S. kiusiana have maintained relatively high genetic diversity, the genetic dynamics of S. kiusiana populations should be continuously monitored.

著者

SHINGO KANEKO NOBUKAZU NAKAGOSHI YUJI ISAGI

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.165-174, 2008-07-30 (Released:2017-03-21)

参考文献数

53

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Polyploidization is an important evolutionary force in plant speciation, and elucidating the origin and evolutionary history of a particular polyploid is important for understanding the evolution and distribution of plants. We investigated the origin of the endangered tetraploid Adonis ramosa Franch., which is endemic to Japan. To clarify the origin and phylogenetic relationships among A. ramosa and diploid species, we conducted a phylogenetic analysis of the species of Adonis in Japan and Korea using chloroplast trnL-trnF spacer and nuclear ribosomal internal transcribed spacer (ITS) sequences. The sequences of the ITS region of showed that the sequences of A. ramosa were completely consistent with or quite similar to those of A. amurensis Regel & Radde of Hokkaido, Japan, and clearly differed from those of A. amurensis in Korea and three diploid species from Japan and Korea. The results suggest the possibility that A. ramosa is an autotetraploid, and the diploid progenitor is A. amurensis from Hokkaido. The distribution pattern of the ITS haplotype of A. ramosa also indicates range expansion of A. ramosa from northern to southern Japan Ecological divergence and adaptation to new habitats after polyploidization are likely to increase the survival of A. ramosa and enable it to widely colonize in new environments in Japan.

著者

Noriyuki Fujii Satoshi Takasawa Masashi Yokogawa Takashi Yamasaki Kensuke Harada Shingo Kaneko Yuji Isagi

出版者

The Japanese Society for Plant Systematics

雑誌

Acta Phytotaxonomica et Geobotanica (ISSN:13467565)

巻号頁・発行日

vol.67, no.2, pp.69-82, 2016 (Released:2016-12-20)

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Veronicastrum sibiricum var. zuccarinii (Plantaginaceae) is an endangered perennial herb native to semi-natural grasslands in southern Korea and Kyushu, Japan. To elucidate the genetic status of V. sibiricum var. zuccarinii in the Aso region of Kyushu, in which relatively large populations still remain, we analyzed seven populations using five novel microsatellite markers. Each population of V. sibiricum var. zuccarinii has a maintained moderate level of genetic diversity (mean H E = 0.596, mean N A = 5.6, and mean AR = 4.7). Pairwise F ST indicated significant genetic differentiation between all population pairs (0.065−0.309). The semi-natural grasslands in the Aso region have decreased in area over the past decades. Thus, habitat fragmentation may be causing genetic differentiation among populations of V. sibiricum var. zuccarinii. Although the populations of this variety have maintained a moderate degree of genetic diversity, the dynamics of gene flow among them should be continuously monitored.

著者

TADASHI YAMASHIRO ASUKA YAMASHIRO MAKOTO OGAWA NOBUHIRA KUROSAKI TOMIKI KOBAYASHI 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.63, no.1, pp.29-40, 2012-10-31 (Released:2017-03-21)

参考文献数

36

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We examined morphological differentiation and allozyme diversity in nine populations of Vincetoxicum katoi and its close relative V. yamanakae. Although, V. yamanakae has been distinguished from V. katoi in having a larger corolla and gynostegium, the principal component analysis based on 12 floral and three leaf characters did not support the distinction of the two taxa. The six allozyme loci examined revealed that population of V. katoi and V. yamanakae maintained high genetic diversity (P=72.1, A=2.40, h=0.313). The nine populations were clustered into three regions (Kanto-Tokai; middle Kiniki; and Kii-Shikoku) based on genetic differences, contradicting the current taxonomic treatment. Considering the evidence, it is appropriate to treat V. yamanakae as a synonym of V. katoi. The high genetic differentiation among regions suggested that disjunct distribution of the V. katoi-V. yamanakae complex might reflect the persistence of refugia since the last glacial period. In particular, the middle Kinki (Hyogo) population is located outside of known evergreen forest refugia, suggesting that it might have survived during the glacial period within cooler vegetative zones, such as in temperate forests, whereas the populations on the Pacific-side retreated to warm-temperature coastal refugia.

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)

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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.