- published: 19 Dec 2010
- views: 8207
An oak is a tree or shrub in the genus Quercus ( /ˈkwɜrkəs/;Latin "oak tree"), of which about 600 species exist. "Oak" may also appear in the names of species in related genera, notably Lithocarpus. The genus is native to the northern hemisphere, and includes deciduous and evergreen species extending from cool temperate to tropical latitudes in Asia and the Americas.
Oaks have spirally arranged leaves, with a lobed margin in many species; some have serrated leaves or entire leaves with a smooth margin. Many deciduous species are marcescent, not dropping dead leaves until spring. The flowers are catkins, produced in spring. The fruit is a nut called an acorn, borne in a cup-like structure known as a cupule; each acorn contains one seed (rarely two or three) and takes 6–18 months to mature, depending on species. The live oaks are distinguished for being evergreen, but are not actually a distinct group and instead are dispersed across the genus.
Oak trees are a flowering plant. The genus is divided into two subgenera and a number of sections:
Quercus - Global Warming
June Tabor, Iain Ballamy, Huw Warren (Quercus) - The Lads in Their Hundreds
June Tabor / Iain Ballamy / Huw Warren - All I Ask Of You
Středověká hudba Quercus - Collaudemus Christum Regem
Quercus bomen,iedere dag een snipperdag.
Quercus
QUERCUS - ?
Quercus - Mraveneček
QUERCUS -L´ULTIMA HAVANERA
KONG VOM QUERCUS WALD
Quercus - Stop Global Warming
Quercus fragrance from Penhaligon's
QUERCUS FAGINEA
Villancico Quercus 2015 ¨Te quiero desear¨