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Buxaceae Dumort (ツゲ科)

Mount Usu / Sarobetsu post-mined peatland
From left: Crater basin in 1986 and 2006. Cottongrass / Daylily

Buxus L. (ツゲ)
Pachysandra Michx. (フッキソウ)
Sarcococca Lindl. (サルココッカ)
Styloceras Kunth ex A.Juss.
Notobuxus Oliv.
sometimes merged into Buxus

[Engler's syllabus (エングラー体系)]

Buxus L. (ツゲ) in Japan

B. bodinieri H. Lev. (カラヒメツゲ)
B. liukiuensis (Makino) Makino (オキナワツゲ)
B. microphylla Siebold et Zucc. (ヒメツゲ)
B. sempervirens L. (セイヨウツゲ)

Pachysandra Michx. (フッキソウ)

There are five natives to eastern Asia
One species is distributed in Japan
P. terminalis Siebold et Zucc. (フッキソウ)

Sarcococca Lindl., sweet box or Christmas box

16-20 species
native to eastern/southeastern Asia and the Himalayas
S. hookeriana Baill. (ヒマラヤサルココッカ)
S. saligna (D.Don) Müll. Arg. (サルココッカ)