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SEQUOIA , a genus of conifers, allied to Taxodium and See also:Cryptomeria, forming one of several surviving links between the firs and the cypresses . The two See also:species are See also:evergreen trees of large See also:size, indigenous to the See also:west See also:coast of See also:North See also:America . Both See also:bear their See also:round or ovoid male catkins at the ends of the slenderterminal branchlets; the ovoid cones, either terminal or on See also:short lateral twigs, have thick woody scales dilated at the extremity, with a broad disk depressed in the centre and usually furnished with a short spine; at the See also:base of the scales are from three to seven ovules, which become reversed or partially so by See also:compression, ripening into small angular See also:seed with a narrow wing-like expansion . The redwood of the Californian woodsmen, S. sempervirens, on which the genus was originally founded by See also:Stephan Endlicher, abounds on the Pacific coast from the See also:southern See also:borders of See also:Oregon southward to about 12 M. See also:south of Punta Gorda, See also:Monterey See also:county, See also:California, forming a narrow See also:mountain See also:forest See also:belt, rarely extending more than 20 or 3o m. from the coast or beyond the See also:influence of ocean fogs, or more than 3000 ft. above See also:sea-level (see C . S . See also:Sargent, See also:Silva of North America, vol. x.) . It grows to a gigantic size, from 200 to 300 ft. or more in height, with a See also:diameter of from 12 to 15, or rarely 20 to 28 ft. at the much- Sequoia sempervirens—a, See also:Branch with See also:green cones and male catkins; b, See also:Section of See also:cone; c, See also:Scale of cone . All slightly reduced . buttressed base . See also:Professor Sargent refers to it as the tallest See also:American See also:tree, which probably occasionally reaches 400 ft. or more in height . In old See also:age the huge columnar See also:trunk rises to a See also:great height See also:bare of boughs, while on the upper See also:part the branches are short and irregular . The bark is red, like that of the Scots See also:fir, deeply furrowed, with the ridges often much curved and See also:twisted .
When See also:young the tree is one of the most graceful of. the conifers: the See also:stem rises straight and tapering, with somewhat irregular whorls of drooping branches, the See also:lower ones sweeping the ground—giving an elegant conical outline
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The twigs are densely clothed with See also:flat spreading linear leaves of a See also:fine glossy green above and See also:glaucous beneath; in the old trees they become shorter and more rigid and partly lose their distichous See also:habit
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The cones, from to 1 in. See also:long, are at first of a bluish-green See also:colour, but when mature See also:change to a reddish See also:
The bark, of nearly the same tint as that of the redwood, is extremely thick and is channelled towards the base with See also:vertical furrows; at the See also:root the ridges often stand out in See also:buttress-like projections
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The See also:average height is about 275 ft. with a diameter near the ground of 20 ft.; but specimens from 300 to 320 ft. tall, with trunks 25-35 ft. thick, are not rare
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The famous See also:group known as the See also:Mammoth Grove of Calaveras in California, containing above ninety large trees, stands in 38° N., about 4370 ft. above the sea, between the See also:San See also:Antonio and See also:Stanislaus See also:rivers
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It was discovered by a See also:hunter named Dowd in pursuit of a bear in 1852, but had been visited before by See also: In the See also:Atlantic States it does not succeed; and, though nearly See also:hardy in Great See also:Britain, it is planted only as an See also:ornament of the See also:lawn or paddock . In See also:early See also:geological times the sequoias occupied a far more important See also:place in the vegetation of the See also:earth . They occur in the Lower See also:Chalk formations, and in See also:Tertiary times were widely diffused ; the genus is represented in the See also:Eocene See also:flora of Great Britain, and in the succeeding See also:Miocene See also:period was widely distributed in See also:Europe and western See also:Asia . It is presumed that in the Glacial See also:epoch the genus was exterminated except in the areas in western North America where it still persists . |
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