Genus Thuya, L. (Arbor Vitae)
Leaves - simple; indeterminate in position because of their smallness and closeness. They are scale-like, somewhat egg-shape, overlapping each other, and closely pressed in four rows up and down the very flat branchlets. Each leaf has at its centre a raised gland, easily distinguished if held between the eye and the light. Bark - fibrous. The “spray” (formed from the flat branchlets) is itself flat and of rather a bright green. Cones - about five twelfths of an inch in length, long oval or reverse egg-shape, nodding, yellowish-brown as they ripen, dry and opening to the base when ripe. Scales - pointless, oval or egg-shape, smooth (i. e., not pointed on the edge or near the centre.) Seeds - one to two under each scale, long and narrow (like a small caraway seed); broadly winged all around, with the wing notched at one end. Found - along the Alleghany Mountains from the high peaks of North Carolina to Northern Pennsylvania and Central New York, northward into Southern Canada and westward; along rocky banks of streams and in swamps; very common at the North, where it often occupies large areas of swamp land. It is very widely cultivated, especially in hedges. General Information - A tapering evergreen tree, twenty to fifty feet high, with close, dense branches, and a light and durable wood.
Keywordsleaf, trees of northeast America, trees of northeast United States, tree with simple leaves, leaves indeterminate, cone-bearing trees
Newhall, Charles S. The Trees of North-Eastern America (New York: The Knickerbocker Press, 1900) 179