. Bulletin (Pennsylvania Department of Forestry), no. 11. Forests and forestry. 92 i ARBOR VITAE Thuja occidentalis, Linnaeus GENVS DESCRIPTION-The genuB Thuja comprises 4 known species 4" t^J^.^^^'/' "^^^^ n,^er 2 are found in North America. One of the 2 species native to North Ame^ca is found r^f eastern part, and the other in the western part. The westenx spec es ^ttah^s a Bize while the one found in the East usually remains a smaU tree. They are ^^IJ^l^ ar;r^ment«rtrrs but furnish some lumber, which is very valuable on account of its great SLa^^! The S^k also yields tanning
. Bulletin (Pennsylvania Department of Forestry), no. 11. Forests and forestry. 92 i ARBOR VITAE Thuja occidentalis, Linnaeus GENVS DESCRIPTION-The genuB Thuja comprises 4 known species 4" t^J^.^^^'/' "^^^^ n,^er 2 are found in North America. One of the 2 species native to North Ame^ca is found r^f eastern part, and the other in the western part. The westenx spec es ^ttah^s a Bize while the one found in the East usually remains a smaU tree. They are ^^IJ^l^ ar;r^ment«rtrrs but furnish some lumber, which is very valuable on account of its great SLa^^! The S^k also yields tanning material and the twigs and leaves contain a volatile oil which possesses stimulating properties. FORM-A medium-sized tree usually attaining a height ol 20-50 ft. with a diameter of 1-2 ft. but may reach a height of 75 ft. with a diameter of 3-4 ft. TRUNK-Tapering. furrowed, buttressed and often divided. Crown dense, conical, very high, and often covered with foliage almost to the base. BARK-Grayish to reddish-brown, thin, furrowed, separating into long rather thin, fibrous and often persistent strips. TWIG&-Yellowi8h-green, evidently flattened, somewhat 4-8ided. completely covered by closely adhering leaves, zigzag or arranged in fan-shaped clusters. BUDS—Leaf-buds not scaly, covered by closely adhering scale-like leaves. lEAVES-Opposite. scale-like, closely overlapping, aromatic when c'Tf f' ^"^,J^7,,„^°'^^\^"* ous glandular s^ts on the thrifty shoots. | of an inch long, of two kinds in altematmg pairs. Those on the side of the twigs keeled; those on the face of the twigs flat. FTOWERS-Annear about April or May. Stamlnate and pistillate flowers usually «>ccur on di™^ tw?^ Stai^nat"lre ro^^^^ inconspicuous and yellowish. PistiUate are small, ovoid, purplish, with 4-6 pairs of thin oval scales. FRUIT-An oblong cone with 6-12 obtuse scales. i-§ of an inch long, reddish-brown, matures in one season. Seeds oblong, winged, about i of an inch long. WO
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectforests, bookyear1901
