bur oak
an oak tree, Quercus macrocarpa, of eastern North America, having shiny, dark-green leaves, light-gray deeply ridged bark, and very large acorns with a fringed cup, yielding a hard, durable wood: the state tree of Illinois.
[1805-15, Amer.]

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tree
also spelled  burr oak,  also called  mossy-cup oak 
 (Quercus macrocarpa), North American timber tree belonging to the white oak group of the genus Quercus in the beech family (Fagaceae), distributed primarily throughout the central United States. Often 25 metres (80 feet) tall, the tree may reach 50 metres. Its leaves, about 25 centimetres (10 inches) long, are dark green and shiny above, dull and whitish beneath; the wide upper half of each leaf is separated from the narrow lower part by two deep sinuses. Bur oak is also called mossy-cup oak for its heavily fringed acorn cups. It has become a popular ornamental and shade tree in urban areas because of its resistance to insect and fungal attack, drought, and air pollution. Previously common in oak savannas and prairies, the tree is well adapted to fire with its corky, fire-resistant bark.

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Universalium. 2010.

Look at other dictionaries:

  • Bur oak — Oak Oak ([=o]k), n. [OE. oke, ok, ak, AS. [=a]c; akin to D. eik, G. eiche, OHG. eih, Icel. eik, Sw. ek, Dan. eeg.] [1913 Webster] 1. (Bot.) Any tree or shrub of the genus {Quercus}. The oaks have alternate leaves, often variously lobed, and… …   The Collaborative International Dictionary of English

  • Bur oak — Bur Bur, Burr Burr (b[^u]r), n. [OE. burre burdock; cf. Dan. borre, OSw. borra, burdock, thistle; perh. akin to E. bristle (burr for burz ), or perh. to F. bourre hair, wool, stuff; also, according to Cotgrave, the downe, or hairie coat,… …   The Collaborative International Dictionary of English

  • bur oak — ☆ bur oak n. a North American white oak (Quercus macrocarpa) having large acorns with fringed cups; mossy cup oak …   English World dictionary

  • Bur oak — Taxobox name = Bur Oak status = LR/lc | status system = IUCN2.3 image width = 240px image caption = Bur Oak leaves and acorn regnum = Plantae divisio = Magnoliophyta classis = Magnoliopsida ordo = Fagales familia = Fagaceae genus = Quercus sectio …   Wikipedia

  • bur oak — noun medium to large deciduous oak of central and eastern North America with ovoid acorns deeply immersed in large fringed cups; yields tough close grained wood • Syn: ↑burr oak, ↑mossy cup oak, ↑mossycup oak, ↑Quercus macrocarpa • Hypernyms:… …   Useful english dictionary

  • bur oak — stambiavaisis ąžuolas statusas T sritis vardynas apibrėžtis Bukinių šeimos dekoratyvinis, medieninis augalas (Quercus macrocarpa), paplitęs Šiaurės Amerikoje. atitikmenys: lot. Quercus macrocarpa angl. bur oak; large acorn oak; mossy cup oak vok …   Lithuanian dictionary (lietuvių žodynas)

  • bur oak — noun Date: 1815 a usually large oak (Quercus macrocarpa) of eastern North America having oval acorns enclosed in a fringed cap and tough close grained wood …   New Collegiate Dictionary

  • bur oak — noun a North American oak with large fringed acorn cups and wood formerly used in shipbuilding. [Quercus macrocarpa.] …   English new terms dictionary

  • Bur Oak (VIVA) — Infobox YRT station= Bur Oak Avenue Vivastation type= Proposed Vivastation line= Viva Purple (proposed) Viva Green (proposed) nextstop= Wootten Way (westbound, proposed) Cornell (eastbound, proposed) connections= 1 Highway 7 (proposed) 2A 14th… …   Wikipedia

  • Oak savanna — Oak savanna, California An oak savanna is a type of savanna, or lightly forested grassland, where oaks (Quercus spp.) are the dominant tree species. These savannas were maintained historically through wildfires set by lightning, grazing, low… …   Wikipedia

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