Thuja Thuja, D . Don ex Lambert

1. T. plicata D. Don ex Lambert View in CoL , Descr. Gen. Pinus 2: 19 (1824).

Up to 65 m. Trunk not branched from the base. Leaves opposite and decussate, ovate, acute or obtuse, appressed, eglandular or with an obscure gland, usually with faint white markings beneath. Cone c. 12 mm, conical, brown when ripe; scales 10- 12, thin, with a thickened process on the inner side, projecting beyond the thin, triangular, deflexed apex. Seeds 2-3 per scale, elliptical, winged. Plantedfor timber and locally naturalized. [Au Br Da Ge It Lu No.] (W. North America.)

T. occidentalis L. , Sp. Pl. 1002 (1753), from E. North America, is also sometimes planted, mainly in C. Europe. It has conspicuously glandular leaves which are yellowish- or bluish-green and without white markings beneath; the cones are oblong and bright brown when ripe.

T. orientalis L. , Sp. Pl. 1002 (1753), from China, is occasionally planted, mainly for ornament. It usually has several basal branches as long as the main stem; entirely green leaves; the cone with 6(-8) thick scales, each with a stout hooked or recurved apical boss, and the seeds without a wing. 2n —22.