Forest trees of the Pacific slope . ring the Eocene and Miocene periods. Nine tree birches grow in the United States and adjacent Canadian ter-ritory, of which four inhabit the Pacific region. Western Birch. BciuUi occidoiidlis Hooker. DISTINGUISHING CHARACTERISTICS. Very much confusion has existed regarding the identity of the true BettilaoccidentaUs, which, so far as now known, occurs only in northwestern Wash-ington and adjacent territory in British Columbia. To Prof. C. S. Sargent The last bud on a seasons twig is not strictly a terminal bud, such as is produced byoaks, pines, etc., but a
Forest trees of the Pacific slope . ring the Eocene and Miocene periods. Nine tree birches grow in the United States and adjacent Canadian ter-ritory, of which four inhabit the Pacific region. Western Birch. BciuUi occidoiidlis Hooker. DISTINGUISHING CHARACTERISTICS. Very much confusion has existed regarding the identity of the true BettilaoccidentaUs, which, so far as now known, occurs only in northwestern Wash-ington and adjacent territory in British Columbia. To Prof. C. S. Sargent The last bud on a seasons twig is not strictly a terminal bud, such as is produced byoaks, pines, etc., but a side or lateral bud, which appears terminal because the immatureterminal part of the shoot dies and falls late in autumn or in winter. This is true ofall birches. FOREST TREES OF THE PACIFIC SLOPE. 255 belongs the credit of finally separating this tree from the red-brown or bronzebarked tree {B. fontinalis Sargent) of the Sierra and Roclcy Mountain regions,and also from the paper birch, B. papyrifcra, a form of which was thought to.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectforestsandforestry
