J. Jpn. Bot. 92(4): 248–251 (2017)

a, b Masanobu Higuchi * and Wonhee Kim : brownianum (, Bryophyta), a New Record for the Bryophyte Flora of Korea aDepartment of Botany, National Museum of Nature and Science, 4-1-1, Amakubo, Tsukuba, 305-0005 ; bNational Institute of Biological Resources, the Environmental Research Complex, 42, Hwangyeongro, Seo-gu, Incheon, 404-708 KOREA *Corresponding author: [email protected]

Summary: Tetrodontium brownianum (Dicks.) T. repandum, which are known as rare species. Schwägr. (Tetraphidaceae) is reported as new During the field research of bryophytes in Korea to Korea. The description and photographs in 2015, we found a minute Tetrodontium in Jeju based on Korean are given. This species Island. A microscopic examination confirmed is characterized by its minute, bud-like plants, that the plants are T. brownianum (Dicks.) long and linear protonematal flaps and four multicellular peristome teeth. Some overlooked Schwägr. Tetrodontium species have never characteristics of the species are described. recorded from Korea (cf. Park and Choi 2007, Lee et al. 2011). The genus Tetrodontium is an acrocarpous of the family Tetraphidaceae, consisting Tetrodontium brownianum (Dicks.) of Tetrodontium and Tetraphis. Tetrodontium is Schwägr., Sp. Musc. Frond., Suppl. 2, 2: 102 characterized by minute, bud-like plants, costae (1824). of leaves weak or absent, protonematal flaps and The following description is based on Korean gemmae lacking. A unique feature of the genus plants. is the presence of protonematal flaps which Plants minute, bud-like, ca. 0.2 cm high, appear on the protonema. The genus includes without flagelliform shoots. Stem leaves of three species, T. brownianum, T. ovatum and fertile shoots imbricate, ovate to lanceolate,

Fig. 1. A. Habitat of Tetrodontium brownianum in Jeju Island, Korea. Arrow shows a place where T. brownianum is growing on vertical rock surface. B. Two young sporophytes of Tetrodontium brownianum. Small protonematal flaps with green or brown colors are seen on rock surface.

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a b 樋 口 正 信 ， 金 元 熙 ： 韓 国 新 産 の Tetrodontium brownianum（ヨツバゴケ科，蘚植物門） 2015 年の韓国済州島の調査により韓国から未記録の 多細胞性の蒴歯を持つことなどの特徴を持つ．蒴柄のね Tetrodontium brownianum を確認したので報告する．韓 じれや胞子体の成熟時期などこれまで見過ごされてい 国産の本種の記載文と図を示す．本種は植物体が微小な た特徴も記述した． 芽状であること，“protonematal flap” と呼ばれる原糸体 （a国立科学博物館植物研究部， から生じる紐状の構造が長く，線形になること，4 枚の b韓国・国立生物資源館）