Chamaecyparis obtusa
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Chamaecyparis obtusa is a conifer in the cypress family Cupressaceae, native to central Japan, commonly known as Hinoki Cypress or Hinoki (Japanese: 檜 or 桧). It is a slow-growing tree which grows to 35 m tall with a trunk up to 1 m in diameter. The bark is dark red-brown. The leaves are scale-like, 2-4 mm long, blunt tipped (obtuse), green above, green below with a white stomatal band at the base of each scale-leaf. The cones are globose, 8-12 mm diameter, with 8-12 scales arranged in opposite pairs. The related Chamaecyparis pisifera (Sawara Cypress) can be readily distinguished in its having pointed tips to the leaves and smaller cones.
A similar cypress found on Taiwan is treated by different botanists as either a variety of this species (as Chamaecyparis obtusa var. formosana) or as a separate species Chamaecyparis taiwanensis; it differs in smaller cones 6-9 mm diameter with smaller scales.
Uses
It is grown for its very high quality timber in Japan, where it is used as a material for building palaces, temples, shrines, traditional noh theatres, and baths. The wood is lemon-scented and light-colored with a rich, straight grain, and is highly rot resistant.
It is also a popular ornamental tree in parks and gardens, both in Japan and elsewhere in temperate climates including western Europe and parts of North America. A large number of cultivars have been selected for garden planting, including dwarf forms, forms with yellow leaves, and forms with congested foliage.
Problems
Hinoki (and Sugi) pollen is a major cause of hayfever in Japan.References
- Conifer Specialist Group (2000). [Chamaecyparis obtusa]. 2006 IUCN Red List of Threatened Species. IUCN 2006. Retrieved on 11 May 2006.
External links
- [Arboretum de Villardebelle: close-up photo of cones]
- [Arboretum de Villardebelle: photo of foliage & cones]
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