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Larches are deciduous conifers in the genus Larix, of the family Pinaceae (subfamily Laricoideae).Growing from 20 to 45 metres (65 to 150 feet) tall, [1] they are native to the cooler regions of the northern hemisphere, where they are found in lowland forests in the high latitudes, and high in mountains further south.
The composition and structure of high latitude Cretaceous forests was composed primarily of deciduous conifers, ferns, angiosperms and gymnosperms. The most abundant and globally widespread plant taxa were the araucarioid and podocarpoid conifers, extending approximately 80° into both hemispheres and composing more than 90% of the canopy ...
The great majority of conifer genera and species are evergreen, retaining their leaves for several (2–40) years before falling, but unusual deciduous conifers occur in five genera (Larix, Pseudolarix, Glyptostrobus, Metasequoia and Taxodium), shedding their leaves in autumn and leafless through the winter.
The boreal forest zone consists of closed-crown conifer forests with a conspicuous deciduous element (Ritchie 1987). [4] The proportions of the dominant conifers (white and black spruces, jack pine ( Pinus banksiana Lamb.), tamarack, and balsam fir) vary greatly in response to interactions among climate , [ 5 ] topography , soil , fire , pests ...
The tree is a large deciduous conifer reaching 30 to 60 meters (98 to 197 feet) tall, with a trunk up to 1.5 m (4 ft 11 in) diameter; the bark ranges from orangish to purplish brown. [5] The crown is narrow conic; the main branches are level to upswept, with the side branches often drooping.
Larix lyallii, the subalpine larch, or simply alpine larch, is a deciduous, coniferous tree native to northwestern North America. It lives at high altitudes, from 1,500 to 2,900 meters (4,900 to 9,500 ft), [3] in the Rocky Mountains of Idaho, Montana, British Columbia, and Alberta. There is a disjunct population in the Cascade Range of Washington.
Glyptostrobus is a small genus of conifers in the family Cupressaceae (formerly in the family Taxodiaceae).The sole living species, Glyptostrobus pensilis, is native to subtropical southeastern China, from Fujian west to southeast Yunnan, and also very locally in northern Vietnam and Bolikhamsai province of eastern Laos near the Vietnam border.
[28] [29] One of the last remaining old growth stands of conifers is in the Mattole Watershed, and is under threat of logging. [30] [31] In the Sierra Nevada, it ranges as far south as the Yosemite region. It occurs from sea level along the coast to elevations of 1,500 m (4,900 ft) or higher, and inland in some cases up to 2,100 m (6,900 ft).