Cercidiphyllum japonicum - Katsura tree, Autumn colours

Katsura Tree

Cercidiphyllum japonicum

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Family:
Cercidiphyllaceae. The Katsura is the only member of this botanical family. It is closely related however to the Magnolia's and Tulip tree. 

The Katsura is a deciduous tree introduced to Britain in 1865 from Japan.
The tree is grown in parks, gardens and collections mostly for stunning Autumn colours. The opposite leaves are bronze when they first appear. The flowers appear in April, just before the leaves. Male and female flowers grow on separate trees.
 A 1910 expedition by A. E. Wilson discovered a Chinese variety of the Katsura. Once the expedition members came close, it must have been hard to miss this tree, since it was more than 40 meters high and had a huge girth of nearly 16 meters!

Cercidiphyllum japonicum - Katsura tree in early Autumn

Cercidiphyllum japonicum - Katsura tree, leavesA noteworthy peculiarity of this tree is that the leaves, when freshly shed, give out a small of freshly baked cakes, as if they had just been taken out of the oven. I've also read the tree smells of burnt toffee. Alas I have yet got to make my acquaintance with a Katsura myself, but I've been told that the smell makes it possible for a human nose to locate the tree even in dense growth.
(I received an email from Diana O'Reardon, a London City and St Paul's Guide, to say that we can find a Katsura in St Paul's Cathedral churchyard - N.E. corner, by Paul's Cross. Thanks Diana!! - June 2005)

Name:
The scientific name derives from 'Cercis' (judas tree genus) and 'phyllum' (the Greek word for leaf) and thus alludes to the resemblance between the leaves of the Judas tree and the Katsura.

Cercidiphyllum japonicum - Katsura tree, flowersCultivation:
Propagation is by seed at the end of the winter or by soft wood cuttings or layering in the summer. 
This is a reasonably hardy tree, which will both grow in Sun or semi-shade, tolerates dry conditions and chalk, although I've heard that its amazing Autumn colours cannot be completely relied upon in complete alkaline or dry conditions. Has anyone any info on this? In its native lands the Katsura can reach 30 meters (100 feet), but here the emerging shoots are often killed of by cold winds and spring frosts. The tree survives this, but ends up resembling a shrub. The ideal conditions for this tree would be on a deep moist soil, away from frost and winds. It will repay this care with stunning autumn displays and could grow 40 ft in 20 years.

Uses:
The timber is light, fine-grained and yellow in colour. In its native Japan and China this is used for furniture and other interior woodwork.

Note from webmother to  page visitors:
Many of these pages are still bare bones. Whenever time allows, we will continue to add information to the Tree Gallery until all the trees have descriptions of their habitat, characteristics, cultivation, uses and anything else of interest. Why not get involved with enhancing this web resource by sending photographs of trees, bark, details of branches, leaves, flowers, seed and fruit in all seasons (Good use of all these new digital cameras!). Email us if you are keen to know more about a particular tree and we will do our best to complete that one next. 

Page last updated: 28 June 2005



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