Thujopsis

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(Redirected from Hiba)
Thujopsis
Conservation status: Secure
Missing image
Thujopsis_dolabrata2.jpg



Thujopsis dolabrata; (left) upper side of shoot
(right) lower side of shoot
(top) mature cones. 1 Euro coin for scale.
Scientific classification
Kingdom:Plantae
Division:Pinophyta
Class:Pinopsida
Order:Pinales
Family:Cupressaceae
Genus:Thujopsis
Species:T. dolabrata

Template:Taxobox section binomial botany

Thujopsis (pronounced "Thuyopsis") is a conifer in the cypress family (Cupressaceae), the sole member of the genus being Thujopsis dolabrata. It is endemic to Japan, where it is named Hiba. It is similar to the closely related genus Thuja (Arborvitae), differing in the broader, thicker leaves and thick cones. Though some use false arvborvitae, the species has never acquired a widely used English name, usually being known either by the Japanese name or by its genus name, Thujopsis; it is occasionally also compounded as Hiba Arborvitae due to its similarity to Thuja.

Missing image
Thujopsis_dolabrata1.jpg
Thujopsis dolabrata foliage

Thujopsis is a medium to large evergreen tree, reaching up to 40 m tall and 1.5 m trunk diameter, with red-brown bark which peels in vertical strips. The leaves are arranged in decussate pairs, scale-like, 3-10 mm long, glossy green above, and marked with vivid white stomatal bands below; they have a distinctive thick, almost fleshy texture. The seed cones are ovoid, 7-15 mm long and 6-10 mm diameter, with 6-12 thick scales, brown with a violet-white wax bloom when fresh.

There are two varieties:

  • Thujopsis dolabrata var. dolabrata. Central and southern Japan. Shoots less densely branched with slightly larger leaves, and strongly thickened cone scales.
  • Thujopsis dolabrata var. hondai. Northern Japan. Shoots more densely branched with slightly smaller leaves, and less thickened cone scales.

Uses

Missing image
Thujopsis_dolabrata0.jpg
Young Hiba plant

The Hiba is a valued ornamental tree both in its native Japan, where it is commonly planted around temples as well as in gardens, and also in Europe and North America. In the latter two regions, planting is confined to areas with good rainfall, as the species is not drought tolerant.

It is also used to a small extent in forestry in Japan, grown for the valuable wood, which is durable and scented, similar to that of Thuja plicata.da:Hnsebenstr (Thujopsis dolabrata) eo:Hiba ja:ヒバ

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