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.

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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.

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A new species of Largerstroemia ruffordii T. T. Pham & Tagane (Lythraceae) from Vietnam and Cambodia is described and illustrated. It is morphologically similar to L. petiolaris in having petioles more than 0.9 cm long, but distinguished mainly by its narrower leaves, larger flowers and distinctly 6-ridged calyx tube. DNA barcodes of the two chloroplast regions of rbcL and matK and one ITS of nuclear ribosomal DNA are also provided.

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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.

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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.

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A new, achlorophyllous form of Cephalanthera subaphylla, f. leucophylla Suetsugu, is described. Because C. subaphylla is known to be strongly mycoheterotrophic and obtains most of its carbon from mycorrhizal fungi, the high dependency on mycobionts may have lead to the persistence of albino mutants in C. subaphylla.

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Akiyo Naiki, Shuichiro Tagane, Phourin Chhang, Van-Son Dang, Hironori Toyama, Hidetoshi Nagamasu and Tetsukazu Yahara. 2017. Two New Taxa and One New Report of Tarenna (Rubiaceae) for the Flora of Cambodia and Vietnam. Acta Phytotaxonomica et Geobotanica 68 (2): 93–100.

'doi: 18942/apg201701' should be replaced by 'doi: 10.18942/apg.201701.'

'1b. Lower leaf surface hairy ……… 18' should be replaced by '1b. Lower leaf surface hairy ……… 17' (p. 99, Key to the species of Tarenna in Cambodia, Laos, and Vietnam).

'18b. Leaves chartaceous; flowers pedicellate, ovules 15–20 per locule ……… 19' should be replaced by '18b. Leaves chartaceous; flowers pedicellate; ovules 15–20 per locule ……… 20' (p. 99, Key to the species of Tarenna in Cambodia, Laos, and Vietnam).

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Kenji Suetsugu, Akiyo Naiki, Yayoi Takeuchi, Hironori Toyama, Shuichiro Tagane and Tetsukazu Yahara. 2017. New Distributional Records of the Mycoheterotrophic Sciaphila alba (Triuridaceae), outside the Type Locality. Acta Phytotaxonomica et Geobotanica 68 (2): 123–126.

'doi: 10.18942/apg.201614' should be replaced by 'doi: 10.18942/apg.201702.'

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