Japanese Red Cedar Cryptomeria japonica
The Japanese Red Cedar, a conifer native to China and Japan, is not a ‘true’ cedar. It gets its name from having wood that smells similar to the ‘true’ cedars – Cedar of Lebanon, Deodar and Atlas Cedar – but, in fact, its closest relative is the Giant Sequoia. It is the national tree of Japan where it is known as the ‘Sugi’. It was introduced to Britain in 1861 and is commonly planted in large gardens where it can reach 40m in height. It can be identified by its unusual spiny cones, long, scale-like hanging leaves and red bark
The Japanese Red Cedar was originally grouped in a large primitive family (Taxodiaceae) which included the Dawn Redwood, the Coast Redwood and the Giant Sequoia. They are all relics from a period 100 million years ago when they were widespread. They now have a very restricted natural distribution. The Dawn Redwood is only found in central China, the Japanese Red Cedar in Japan and China and the other two in California. Modern taxonomic studies suggest that rather than being grouped in the Taxodiaceae family they should be grouped with the Swamp Cypresses.
Mature Japanese Red Cedar
Shoots fan out into branchlets
The long scale-like leaves curve out and down from the hanging shoot. They are similar to the leaves of the Giant Sequoia but are longer and curve outwards more.
The bark is red-brown with strips that peel off.
Male pollen cones in October. They shed pollen in February
New seed cones are green in October. They ripen and turn brown in a year.
Close-up of a ripe cone, open after shedding seeds. Each cone has about 20 seed scales and on each scale there are 5 hooks.
Cones on some trees are abundant. These cones have shed seeds but will stay on the tree though the following year. Photo taken in October.