Haplopteris mediosora (Hayata) X. C. Zhang (Pteridaceae), a fern with linear simple fronds is widely distributed at high elevations from the Himalayas through China, the Philippines and Taiwan to Japan. In Japan, sporophytes of H. mediosora were recorded only from Azusa-shiraiwa, a mountain of Okuchichibu region, and have not been seen for over 50 years. The hypothesis that such rare species still persist as gametophytes was proven during this study when gametophytes were found on several mountains in the Oku-chichibu region. Phylogenetic analysis of rbcL sequences collected in this study demonstrated that the gametophytes, identified as H. mediosora, and sporophytes of H. mediosora formed a clade and were distinct from related species of Haplopteris. The gametophytes were also growing independently because of the absence of sporophytes. A comparison of the haplotypes of the matK and trnL-F regions showed that the gametophytes had two chloroplast DNA haplotypes. The polymorphisms may have been derived from ancestral sporophytes that were present in Japan during the glacial period. Despite the rarity of sporophytes in the area, the independent gametophytes occur in four distant localities in the Oku-chichibu mountains.

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Carex planata has been treated as comprising three varieties: var. planata, var. angustealata, and var. remotiuscula. To evaluate this treatment, characteristics of the inflorescences, spikes, utricles, and achenes of both herbarium specimens and growing plants in the field were examined. Principal component analysis (PCA) revealed two distinct groups within C. planata, one of which was identical to var. angustealata and the other to var. planata; var. remotiuscula could not be distinguished from var. planata. Variety remotiuscula was confirmed to be a synonym of var. planata. Variety angustealata of western Japan grows in flood plains along rivers. The results from PCA and information from distribution and habitat led to the conclusion that var. angustealata should be treated as a distinct species: C. angustealata, characterized by ascendant utricles and a greater number of spikes (≥ 9) on well-grown plants. Smaller achenes in proportion to the utricles also distinguish C. angustealata from C. planata. Detailed descriptions of both C. angustealata and C. planata based on the numerical survey are presented. Lectotypes of var. angustealata Akiyama and var. remotiuscula Akiyama are designated.

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Based on plants collected from Khao Luang, Nakhon Si Thammarat, Thailand, a new species, Curculigo radialis Fuse & Sirim. (Hypoxidaceae) is described. It is similar to C. latifolia Dryand. ex W. T. Aiton and C. conoc Gagnep., but differs from both species in having a longer perigone tube (4.5–6 cm long) and from the latter also in having an ellipsoid stigma.

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A new flower color variant of Hemerocallis middendorffii var. esculenta is here described as f. luteola. Compared to the typical type with orangish yellow flowers, the new form is distinguished by its pale yellow perianth, filaments and style. Only one individual of the new form was found in a wild population in Kyoto Prefecture, Japan. The color difference of the perianth was maintained in a common garden environment, and in two plants segregated from progeny established from wild seeds, indicating that the color variant has a genetic basis.

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The taxonomic status of Taeniophyllum aphyllum (Makino) Makino, described from Kochi, Japan, is reevaluated. It has often been treated as a synonym of T. glandulosum Blume from Java, Indonesia, but is distinguishable from T. glandulosum by the pubescence of the inflorescence rachis, the arrangement of the flowers, inflorescence length, and shape of the fully developed fruit. It is therefore proposed that T. aphyllum is recognized as a distinct species. A lectotype for T. aphyllum is also proposed.

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Endozoochorous dispersal of the invasive alien aquatic plant Ludwigia grandiflora subsp. hexapetala through waterfowl in Lake Biwa, Japan, is reported. Germination of seeds collected from the feces of waterfowl in Yabase, southern Lake Biwa proved them to be viable. It is necessary to be vigilant against the sudden appearance of L. grandiflora subsp. hexapetala in water systems where it is absent and to monitor its dispersal by waterfowl.

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Tao Fujiwara, Katsuhiro Yoneoka, Zhenlong Liang, Atsushi Ebihara, Harald Schneider, Noriaki Murakami and Yasuyuki Watano. 2022. Lepisorus rufofuscus sp. nov. (Polypodiaceae), a New Fern Species Segregated from L. angustus Ching. Acta Phytotaxonomica et Geobotanica 73 (3): 171–182.

In the species name (p. 178, right, l. 8) under Taxonomic treatment, “Lepisorus rufofuscus T. Fujiwara., sp. nov.” should be replaced by “Lepisorus rufofuscus T. Fujiw., sp. nov.”

In the legend of Fig. 4, “Lepisorus rufofuscus T. Fujiw” should be replaced by “Lepisorus rufofuscus T. Fujiw.”

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Index to new names and combinations appearing in Acta Phytotaxonomica et Geobotanica 73 (3)

“Lepisorus rufofuscus T. Fujiwara., sp. nov.” (p. 240) should be replaced by “Lepisorus rufofuscusT. Fujiw., sp. nov.”

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