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(First upload on September 15 2009. Last on August 26 2025) [ 日本語 | English ]

[Engler's syllabus エングラー体系]

Cercidiphyllaceae Sieb. et Zucc.

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consisting of (one or) two species in genus (Cercidiphyllum) Cercidiphyllum Sieb. et Zucc. (カツラ) C. japonicum Sieb. et Zucc. (カツラ) C. magnificum (Nakai) Nakai (ヒロハカツラ, large-leaved katsura), syn. C. japonicum Sieb. et Zucc. var. magnificum Nakai Distributed only in the Chubu District of Japan Leaf: larger than C. japonicum Bark: smooth until large

Katsura forest established in Tsukiura Forest Park faced to Toya Lake on September 4 2018.

Cercidiphyllum japonicum in Hokkaido

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Katsura (カツラ, 桂), Katsura tree Lifeform: large, deciduous, dioecious tree (up to ≈ 30 m in height) ☛ Giant tree (巨木) Koganeyu Katsura Fudo (小金湯桂不動) Kifune Shrine (貴船神社) Distribution: Japan (one variety is distributed in China - controversial) Flora on Mount Usu appeared in "The Collection of Ten Thousand Leaves"

Habitat: streamside, valley, etc. On Mount Usu, the ridges are occuplied by Populus maximowiczii, and the valleys are by C. japonicum Shoot: producing long and spur shoots Flower: no petals Seed: produced wings - wind dispersal Chromosome number: 2n = 38 Use: lumber, furniture and carving wood, park and garden trees

f. pendulum (Miyoshi ex Makino et Nemoto) Ohwi Shidare-katsura (シダレカツラ), weeping katsura-tree Lifeform: weeping-typed C. japonicum Distribution and habitat: same with C. japonicum Synonyms: C. magnificum (Nakai) Nakai f. pendulum (Miyoshi ex Makino et Nemoto) Spongberg, often used

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[1] a tree near the 2000 crater (K-1) at the foot of Mount Usu on September 9 2009. [2-3] In Nakagawa Experimental Forest, Hokkaido University, on June 16 2011. [4] a bark seen along a lake coast on Toya Lake close to Toya Lake Experimental Station, HU, on August 23 2011. [5] male flowers on a transplanted tree in the Hokkaido University campus on May 10 2013. [6] a seedling at Sakushu-kotoni River i nthe HU Campus on July 11 2013.

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f. pendulum (シダレカツラ)

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[1] at the entrance of greenhouse zone managed by Faculty of Agriculture in the campus of HU on August 14 2024.[2/3] within the grounds of Jindaiji Temple (深大寺), located in Jindaiji Motomachi, Chofu, Tokyo, on July 30 2025.