. North American trees : being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies . Trees. 276 Tan Bark Oak The bark is very rich in tannin and is one of the principal tan barks of the Pacific States.' The genus contains about 25 species, mostly natives of southeastern Asia and the Malay region. Castanopsis sempervirens (Kellogg) Dudley, a shrub of higher altitudes in California and Nevada, was long confused with this tree, which often assumes shrubby forms. The generic name is Greek, in allusion to the resembl
. North American trees : being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies . Trees. 276 Tan Bark Oak The bark is very rich in tannin and is one of the principal tan barks of the Pacific States.' The genus contains about 25 species, mostly natives of southeastern Asia and the Malay region. Castanopsis sempervirens (Kellogg) Dudley, a shrub of higher altitudes in California and Nevada, was long confused with this tree, which often assumes shrubby forms. The generic name is Greek, in allusion to the resemblance to the Chestnut, the type species being C. artnaia (D. Don) Spach, of Asia. IV. TAN BARK O'AK GENUS PASAOTA [MIQUEL] ORSTED Species Pasania densiflora (Hooker and Amott) Orsted Quercus densiflora Hooker and Arnott 3LSO called Chestnut oak, this is one of the most stately broad-leaved trees of the Pacific States and occurs from southern Oregon southward along the Coast mountains to Santa Barbara county, CaUfomia, attain- ing in its greatest dimensions a height of 30 meters, with a trunk diameter, of m. Its leaves are evergreen. The trunk is tall and straight with a narrow head when growing in the forest; in the open it is shorter and much branched, the outspreading branches forming a broad round-topped tree. The bark is 2 to cm. thick, deeply and narrowly fissured into broad ridges, which are much broken into angular scaly plates of a bright reddish brown color. The twigs are short, yellowish hairy the first season, becoming smooth, glaucous, and dark red-brown; the buds are ovoid, 6 to 8 mm. long, sharp-pointed, and cov- ered by woolly, ovate scales and surrounded by awl-shaped stipules. The leaves, which persist for 3 or 4 years, are leathery, ob- long or oblong-obovate, 7 to r2 cm. long, blunt or sharp-pointed, rounded, taper- ing, or often somewhat heart-shaped at the base, sharply toothed, revolute on the mar- gin, densely yellow hairy and glandular at first, b
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