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''Quercus ilicifolia'', commonly known as bear oak or scrub oak, is a small shrubby oak native to the eastern United States and southeastern Canada. Its range extends in the United States from Maine to North Carolina, with reports of a few populations north of the international frontier in Ontario.〔(Biota of North America Program 2014 county distribution map )〕 The name ''ilicifolia'' means "holly-leaved." ''Quercus ilicifolia'' is a deciduous tree or shrub growing occasionally reaching a height of 6 meters (20 feet) but usually much smaller.〔(''Quercus ilicifolia''. ) Flora of North America.〕〔Gucker, Corey L. 2006. (''Quercus ilicifolia''. ) In: Fire Effects Information System, (). United States Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory.〕 It is "gangly" and can form a dense thicket. The plant grows from a large taproot which can be up to 20 centimeters (8 inches) thick. The taproot lives a long time, producing several generations of above-ground parts. The alternately arranged leaves are each up to 15 centimeters (6 inches) long by 10 cm (4 inches) wide. The species is monoecious, with plants bearing both male catkins and solitary or clustered female flowers. The egg-shaped acorn is 1 to 2 centimeters (0.4-0.8 inch) long with a saucer-shaped cap. The plant reproduces sexually by seed and also vegetatively by sprouting new stems.〔〔 ''Quercus ilicifolia'' is a dominant plant species in a number of regions and habitat types. In Maine it can be found in deciduous forests alongside red maple (''Acer rubrum''), gray birch (''Betula populifolia''), and quaking aspen (''Populus tremuloides''). In Massachusetts it codominates with black huckleberry (''Gaylussacia baccata'') on the shrublands of Nantucket and Martha's Vineyard. On Cape Cod it occurs with pitch pine (''Pinus rigida'') and broom crowberry (''Corema conradii''). It can be found on the Pine Barrens of New Jersey and pine barrens habitat on Long Island. It also occurs in fire barrens on granite and gneiss further north in Canada.〔Catling, Paul M and Vivian R. Brownell. 1999. The flora and ecology of southern Ontario granite barrens. Pages 392-405 in Anderson, R.C., J.S. Fralish, and J.M. Baskin (eds). Savannas, Barrens, and Rock Outcrop Plant Communities of North America. Cambridge University Press, Cambridge.〕 This oak is adapted to disturbance in the habitat, such as wildfire. Hence, it does not tolerate shade and it requires disturbance to clear remove other plant species so it can receive sunlight. It sprouts prolifically after fire burns away its above-ground parts.〔 ''Quercus ilicifolia'' provides food and shelter for many animal species. Bears consume the acorns, especially when preparing for hibernation. White-tailed deer eat the acorns and the stems and foliage. Many types of squirrels cache the acorns. Many birds depend on them; wild turkeys prefer them over other types of food. A large number of insect species live on the oak. This oak species is the main food plant for 29% of the rare or endangered Lepidopterans in southern New England and southeastern New York.〔 ''Quercus ilicifolia'' has been used in revegetation projects on the Fresh Kills Landfill on Staten Island.〔 ''Quercus ilicifolia'' is also known to rocky summits in the Piedmont of North Carolina where it is listed as a State Endangered Plant. ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Quercus ilicifolia」の詳細全文を読む スポンサード リンク
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