Thuja


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Related to Thuja: arborvitae, thuja oil

Thuja

 

(in Russian, biota), a genus of monoecious arboreous plants of the family Cupressaceae, represented by one species, Thuja orientalis (Biota orientalis).

The tree attains a height of 8–10 m, but it is more often found as a shrub. The needles on the mature branches are scale-like, in a decussate pattern. The crown is ovate and consists of many flat shoots (“scales”) situated in the vertical plane. The erect-standing cones, when immature, are blue-green, and later are dry and mostly reddish brown. The seeds mature in the second year. Thuja is native to China and Korea. In the southern regions of the USSR it is grown as a decorative plant. Thuja is drought resistant and easily pruned.

REFERENCE

Derev’ia i kustarniki SSSR, vol. 1. Moscow-Leningrad, 1949.

A. P. SHIMANIUK


Thuja

 

(arborvitae), a genus of coniferous evergreen trees or shrubs of the family Cupressaceae. The shoots are flattened, and the scalelike or, in juvenile forms, needlelike leaves are appressed to the stem. The cones are borne on the ends of the branches and consist of three or four pairs of leathery-woody scales. The upper scales are sterile. The seeds, which have two narrow wings, mature in the fall of the first year.

There are five species, distributed in North America and East Asia. The plants do not require special growing conditions; for example, they can tolerate urban industrial pollution. They are used as greenery. The American arborvitae (T. occidentalis), a low tree with a pyramidal or ovate crown, is cultivated in orchards and parks throughout Europe (weeping, dwarf, and variegated-leaf forms). In the USSR the species is grown in the steppe and forest zones as far as Archangel’sk, in Siberia, and in the Far East. Its soft, durable wood is used in its native land—eastern North America—for railroad ties, posts, furniture, and lathed items. The leaves yield an essential oil used in medicine and perfume.

The giant arborvitae (T. plicata) grows in northwestern North America. It is 45–55 m tall and has a conical crown and horizontal branches. The durable wood is highly valued for finish work, for lathe work, and for the production of fences, posts, and similar items. The giant arborvitae is cultivated as an ornamental. In the USSR it is grown in gardens and parks of the European portion, the Black Sea Shore of the Caucasus, and Middle Asia (with irrigation). Other species are less commonly cultivated.

REFERENCE

Derev’ia i kustarniki SSSR, vol. 1. Moscow-Leningrad, 1949.

V. N. GLADKOVA

thuya, western red cedar, Pacific red cedar

A soft, lightweight, straight coarse-grained wood that is relatively weak; the sap-wood is white, the heartwood is reddish; because of its durability it is widely used for shingles, tanks, and other exterior applications.
References in periodicals archive ?
Thuja Orientalis, commonly known as More Pankh" in local language, is commonly used as anti-inflammatory agent in traditional medicine.
Thuja is a homeopathic mecine derived from plants and it is considered safe for dogs (Beoricke, 2008).
Thuja occidentalis (Arbor vitae): A review of its pharmaceutical, pharmacological and clinical properties.
The treatment of potato tubers with the alcoholic extract of Thuja at 1, 2, 3 g/L induced systemic resistance in the plant against [PVY.
The ice coverage was more apparent on evergreen species (Tsuga canadensis, and Thuja occidentalis).
Mountain ash Taxodium distichum Baldcypress Thuja occidentalis Arborvitae Tilia sp.
The Skala de la Ville is lined with workshops producing and exhibiting almost any conceivable object crafted from thuja wood.
A craft unique to Essaouira is working with walnut and thuja wood--a type of evergreen.
Hardwood and mixed wood swamps are common, composed of Thuja occidentalis, Juniperus communis, Picea mariana, Fraxinus nigra, Acer rubrum, and Ulmus americana (Rowe 1977).
Commonly known as the eastern white cedar -- taxonomically called Thuja occidentalis -- these cliff-clinging trees grow small and scrubby, yet some of them manage to survive for more than 1,000 years.