velamen

Japanese: velamen

…They are particularly abundant in tropical regions, and are found in many families of angiosperms, including the Orchidaceae, Araceae, and Bromeliaceae, and many of them have special forms that are adapted to arboreal life. Epiphytic plants of the Orchidaceae and Araceae families often have water-storing tissue called velamen developed on the surface of their roots. In the Bromeliaceae family, the bases of the leaves are densely overlapped to form a "tank" that stores water and humus. …

*Some of the terminology explanations that mention "velamen" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…特に熱帯地域に豊富に産し，被子植物ではラン科，サトイモ科，パイナップル科をはじめ多くの科に見られ，樹上の生活に適応した特殊な形態をもつものが多い。ラン科やサトイモ科の着生植物には根の表面にしばしば根被velamenという貯水組織が発達している。パイナップル科では葉の基部が密に重なって〈タンク〉を形づくり，その中に水や腐植質をたくわえる。…

※「velamen」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典第２版について | 情報

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