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

Tetsukazu Yahara Mutsuko Nakajima

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.3, pp.203-208, 2018-10-31 (Released:2018-11-02)

---

Gastrodia albida T. C. Hsu & C. M. Kuo is reported from Yaku Island, Kagoshima Prefecture, Japan, as a new record of this species to Japan. Traits of G. albida are described and illustrated based on specimens collected on Yaku Island. This species has a unique combination of characters, such as only partly united lateral sepals, curved perianth tube and white triangular lip. The population on Yaku Island differs from the population at the type locality in Taiwan in having widely opening lateral sepals and a flat-topped disk of the lip and epichile slightly 2-ridged along the margin.

著者

Norikazu Okabe Tetsukazu Yahara Shuichiro Tagane Chika Mitsuyuki Ayumi Matsuo Takanori Sasaki Etsuko Moritsuka Kengo Fuse Usun Shimizu-Kaya Julia Anak Sang Runi Sylvester Pungga Yoshihisa Suyama

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.43-59, 2021-02-28 (Released:2021-03-21)

---

A new species, Actinodaphne lambirensis Tagane, Yahara & N. Okabe (Lauraceae) from Lambir Hills National Park, Miri District, Sarawak, Malaysia, is described and illustrated. It is characterized by glabrous twigs and leaves, small lamina (4.3–9.2 × 1.7–2.8 cm), and long fruiting peduncles. Because only fruiting specimens were available, the position of A. lambirensis was determined by the phylogenetic trees based on 22 species of Actinodaphne, including the type species of the genus, A. pruinosa Nees, and 11 species of Neolitsea from Southeast Asia using multiplexed inter-simple sequence repeats genotyping by sequencing (MIG-seq). Additionally, a phylogenetic tree was constructed using internal transcribed spacer (ITS) sequences for 36 species of Actinodaphne and 40 species of Neolitsea that include our MIGseq samples and additional species for which ITS sequences were determined in previous studies. Both the MIG-seq tree and ITS tree supported A. lambirensis as belonging with Actinodaphne.

著者

Shuichiro Tagane Nguyen Van Ngoc Hoang Thi Binh Ai Nagahama Meng Zhang Truong Quang Cuong Le Van Son Van-Son Dang Hironori Toyama Natsuki Komada Hidetoshi Nagamasu 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.71, no.3, pp.201-229, 2020 (Released:2020-11-29)

---

Fifteen new species of angiosperms, Ilex bidoupensis, I. hongiaoensis (Aquifoliaceae), Mastixia hongiaoensis (Cornaceae), Daphniphyllum hongiaoense (Daphniphyllaceae), Platea hongiaoensis (Icacinaceae), Neolitsea bidoupensis, N. hongiaoensis (Lauraceae), Nyssa bidoupensis, N. hongiaoensis (Nyssaceae), Eriobotrya hongiaoensis, Prunus hongiaoensis (Rosaceae), Luvunga hongiaoensis (Rutaceae), Illicium viridiflorum (Schisandraceae), Symplocos hongiaoensis (Symplocaceae) and Alpinia hongiaoensis (Zingiberaceae), from the Hon Giao area in Bidoup-Nui Ba National Park, Lam Dong Province, in the southern highlands of Vietnam, are described and illustrated.

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)

---

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

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)

---

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)

---

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

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

---

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.