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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.
Quercus rotundifolia is a medium to large tree, usually 8–12 m (26–39 ft) in height, but can reach up to 15 m (49 ft) with a large, dense, rounded canopy. It has small, leathery, dark-green leaves with a glaucous , densely pubescent underside usually suborbicular to elliptical or lanceolate and are generally spiny to dentate on a younger tree.
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.
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
Native ash species, including white ash (pictured), have been declining rapidly this century due to predation by the emerald ash borer. [1]Silvics of North America (1991), [2] [3] a forest inventory compiled and published by the United States Forest Service, includes many hardwood trees.
Quercus baloot, the holm oak or holly oak is a rare species of oak that was described by Griffith in 1848. It is classified in subgenus Cerris and section Ilex . [ 2 ] It is native to the Himalayas from 1,000–3,000 metres (3,300–9,800 ft).
Holm oak may refer to: . Quercus ilex, tree native to South and Southeast Europe and parts of France; Quercus rotundifolia, tree native to the Iberian Peninsula and Northwest Africa
Quercus suber is a species of the section Cerris to which, for example, the following species also belong: Valonia oak (Quercus macrolepis) Turkey oak (Quercus cerris) Quercus × crenata; Macedonian oak (Quercus trojana) Characteristic for the section are the hairless pericarp and the usually two-year ripening time of the fruits. The cork oak ...