An oak is a tree or shrub in the genus Quercus. There are about 600 species of oak trees. 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 lobed margins in many species; some have serrated leaves or entire leaves with smooth margins. In spring, a single oak tree produces both male flowers (in the form of catkins) and small female flowers.
Oaks have 2 subgeneres: Quercus and Cyclobalanopsis. Quercus is divided into Lepidobalanus and Leucobalanus (white oaks of Europe and Asia and North America), Mesobalanus (Hungarian oak), cerris (Turkey oak), Protobalanus (Canyon live oak), Lobatae (red oaks of Americas). Cyclobalanopsis are the ring-cupped oaks of eastern and southeastern Asia.
Click on photos to enlarge the wallpapers:
Source of the images:
community.humanityhealing.net faerymysterium.com
natures-desktop.com ayay.co.uk lukemcreynolds.com
No comments:
Post a Comment