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Quercus ilex, the holm oak, [2] [3] also (ambiguously, as many oaks are evergreen) evergreen oak, [4] is a large evergreen oak native to the Mediterranean region. It is a member of the section Ilex of the genus, [ 5 ] [ 6 ] with acorns that mature in a single summer.
The genus Quercus contains about 500 known species, plus about 180 hybrids between them. [1] The genus, as is the case with many large genera, is divided into subgenera and sections. Traditionally, the genus Quercus was divided into the two subgenera Cyclobalanopsis, the ring-cupped oaks, and Quercus, which included
Forests include Quercus suber, Pinus pinaster, Quercus pubescens and Castanea sativa too. Supramediterranean vegetation belt, 500– 700 m up to 900- 1,000 m (northern slopes), or 800- 1,000 m to 1,200- 1,350 m (southern slopes); Erica arborea, Quercus ilex, Quercus petraea, Pinus nigra ssp. laricio, Alnus cordata, Ilex aquifolium, Taxus ...
In biology, taxonomic rank (which some authors prefer to call nomenclatural rank [1] because ranking is part of nomenclature rather than taxonomy proper, according to some definitions of these terms) is the relative or absolute level of a group of organisms (a taxon) in a hierarchy that reflects evolutionary relationships.
An oak is a hardwood tree or shrub in the genus Quercus of the beech family. They have spirally arranged leaves, often with lobed edges, and a nut called an acorn , borne within a cup. The genus is widely distributed in the Northern Hemisphere; it includes some 500 species, both deciduous and evergreen .
Quercus sect. Ilex was first established by John Claudius Loudon in 1838. It has also been treated as a subgenus, under the name Quercus subg. Heterobalanus Oerst., and as subsection. Members may be called ilex oaks. [1] Like all species of Quercus, those of section Ilex are trees or shrubs with acorn-like fruit.
Oak tree – Quercus. Algerian Oak – Quercus canariensis; Blue oak – Quercus douglasii; Bur oak – Quercus macrocarpa; California Black Oak Quercus kelloggii; Canyon Live Oak Quercus chrysolepis; Champion oak – Quercus rubra; Coast live oak – Quercus agrifolia; Cork oak – Quercus suber; Dyer's oak – Quercus velutina; Eastern black ...
The ecoregion's plant communities include: Evergreen oak forests, with cork oak (Quercus suber), holm oak (Quercus rotundifolia), and Quercus coccifera as the predominant canopy trees, and an evergreen understory of low trees and high shrubs that include Laurus nobilis, Arbutus unedo, Erica arborea, Erica scoparia, Ilex aquifolium, Phillyrea latifolia, Phillyrea angustifolia, Viburnum tinus ...