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(Upload on December 12 2025) [ 日本語 | English ]

Clethraceae Klotzsch (リョウブ科)

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Order Ericales Two genera in the world (Anderberg & Zhang 2002) One genus in Japan Clethra L. (リョウブ)

Purdiaea Planch. Native to Latin America and the Caribbean, mostly in northern South America

Clethra L. (リョウブ)

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C. alnifolia L. (アメリカリョウブ)

C. barbinervis Siebold et Zucc. (リョウブ)

Clethra barbinervis in Japan

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Ryoubu (リョウブ, 令法), Japanese clethra Lifeform: deciduous shrub ≈ 7-9 m tall Distribution: native to eastern Asia (southern China - Taiwan - Korea - Japan)

Habitat: open mountain forests, often in disturbed secondary forests Seed dispersal: wind Use: edible (young shoots), gardening, furniture Synonyms, discarded: - var. stolonifera (Nakai) Honda (チャボリョウブ) - var. kawadana (Yanagita) H. Hara (ミヤマリョウブ)

1 2 3
[1-3] at a foot of Mount Kakuda (角田山) in the former Maki Town, Niigata Prefecture, central Honshu, collected on October 17 1990. The specimens are kept in SAPS.