Thujopsis dolabrata

Plant Characteristics
Habit		tree
Height:	⇕	100 ft"ft" can not be assigned to a declared number type with value 100.
Width:	⇔	20 ft"ft" can not be assigned to a declared number type with value 20.
Lifespan:	⌛	perennial

Cultivation

Exposure:	☼	sun
USDA Zones:		6 to 10

Scientific Names
Cupressaceae >	Thujopsis >	dolobrata >

Thujopsis (Greek, Thuja-like)^CH. Also spelled Thuyopsis^CH. Pinaceae. Ornamental tree or shrub grown chiefly for its handsome evergreen foliage and the formal habit^CH. The sole member of the genus being Thujopsis dolabrata^wp

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.

Read about Thujopsis dolabrata in the Standard Cyclopedia of Horticulture
A tree closely related to Thuja and chiefly distinguished by the broader much flattened branchlets and by its conelets having 3-5 winged seeds under each scale.—Only one Japanese species. Its yellowish white close and straight-grained wood is very durable and is used in Japan in boat- and bridge-building. Thujopsis is one of the most beautiful Japanese conifers and forms a pyramidal tree, in cultivation sometimes shrubby, with spreading branches, the branchlets arranged in a frond-like fashion, much flattened and clothed with scale-like glossy green foliage. It is well adapted for planting as a single specimen on the lawn wherever it can be grown successfully. It is hardy as far north as Massachusetts, but usually suffers from summer drought. It thrives best in a sheltered and shaded position and in moist loamy soil, and seems to grow to perfection only in cool and moist climates. Propagation is by seeds, also by cuttings and by grafting like thuja. Plants raised from cuttings usually grow into bushy round-headed plants. Plants grafted on thuja are said to be short-lived. Seedlings are therefore to be preferred. ^CH The above text is from the Standard Cyclopedia of Horticulture. It may be out of date, but still contains valuable and interesting information which can be incorporated into the remainder of the article. Click on "Collapse" in the header to hide this text.

Read about Thujopsis dolabrata in the Standard Cyclopedia of Horticulture
Thujopsis dolobrata, Sieb. & Zucc. (Thuja dolobrata, Linn.). Pyramidal tree, attaining 50 ft., or sometimes shrubby: branchlets irregularly whorled or scattered, horizontally spreading and often nodding at the ends; branchlets 1/5 – 1/4 in. broad: lvs. glossy green above, marked with a broad white band beneath, those of the upper and under side obovate-oblong, obtuse, adnate except at the apex, the lateral ones spreading, ovate-lanceolate and curved (hatchet-shaped), obtusish: cone globose-ovoid, about 3/4 in. long; scales 6-10, much thickened at the obtusely pointed apex, the middle ones fertile and with 3-5-winged seeds under each scale. Japan. Var. altissima, Ansorge. Vigorous and of almost columnar habit. Var. cristata, Ansorge. Branches compact, very full and somewhat crisped. Var. nana, Sieb. & Zucc. (T. laetevirens, Lindl.). Dwarf form, with more slender and narrower branchlets of a lighter green. Var. plicata, Ansorge. Very vigorous with heavy branches which hang over and appear folded. Var. variegata, Fortune. Tips of branchlets creamy white. Var. Hondai, Makino (T.Hondai, Henry). Tall tree, to 100 ft.: branches more densely ramified: lvs. smaller and whiter beneath: cone sub-globose, with the scales not thickened at the apex. This is the more northern form and probably hardier than the type which has been called var. australis by Henry. Recently intro. and now growing at the Arnold Arboretum. ^CH The above text is from the Standard Cyclopedia of Horticulture. It may be out of date, but still contains valuable and interesting information which can be incorporated into the remainder of the article. Click on "Collapse" in the header to hide this text.

Cultivation

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Propagation

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Pests and diseases

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Varieties

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.

Gallery

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Thujopsis dolabrata; upper side of shoot, lower side of shoot, mature cones. 1 Euro coin for scale.
Thujopsis dolabrata foliage
Young Asunaro plant
photo 2
photo 3

References

Standard Cyclopedia of Horticulture, by L. H. Bailey, MacMillan Co., 1963

External links

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