(First upload on September 15 2009. Last on November 15 2018) [ 日本語 | English ]

Cercidiphyllum japonicum Sieb. et Zucc. ex Hoffm. et Schult.

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

[Engler's syllabus エングラー体系]

Cercidiphyllaceae Sieb. et Zucc.

consisting of one genus (Cercidiphyllum)
Cercidiphyllum Sieb. et Zucc.
C. japonicum Sieb. et Zucc. (カツラ)

f. pendulum (Miyoshi ex Makino et Nemoto) Ohwi (シダレカツラ) [syn. C. magnificum (Nakai) Nakai f. pendulum (Miyoshi ex Makino et Nemoto) Spongberg]

C. magnificum (Nakai) Nakai (ヒロハカツラ), syn. C. japonicum Sieb. et Zucc. var. magnificum Nakai

Cercidiphyllum japonicum in Hokkaido

Katsura (カツラ, 桂), Katsura tree
Lifeform: large, deciduous tree
Distribution: Japan (one variety is distributed in China)
Habitat: streamside, valley, etc. On Mount Usu, the ridges are occuplied by Populus maximowiczii, and the valleys are by C. japonicum

Flora on Mount Usu

Dioecious plant
Chromosome number: 2n = 38
Katsura forest established in Tsukiura Forest Park faced to Toya Lake on September 4 2018.

[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.