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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
[f] Blue: East Asian. [g] [12] See Phylogeny chapter/tree for sections. [clarification needed] The genus Quercus is native to the Northern Hemisphere and includes deciduous and evergreen species extending from cool temperate to tropical latitudes in the Americas, Asia, Europe, and North Africa. North America has the largest number of oak ...
The acorns ripen in autumn, about six months after pollination. [9] It is a resilient tree that can survive temperatures below −20 °C (−4 °F), and that on occasion reach 47 °C (117 °F). [5] As opposed to Quercus ilex, its acorns have a very low level of bitterness tannins and so are generally sweet and a good energy source for livestock ...
Live oak was widely used in early American butt shipbuilding.Because of the trees' short height and low-hanging branches, lumber from live oaks was used in curved parts of the frame, such as knee braces (single-piece, L-shaped braces that spring inward from the side and support the deck), in which the grain runs perpendicular to structural stress, making for exceptional strength.
Plus a half-dozen other oak species, hickories, wild black cherry, two huge sycamores, a white pine, our native dry-land dogwood Cornus racemosa, as opposed to the large-flowered Cornus Florida ...
The pigs are slaughtered for Jamón ibérico, and ham from acorn-fed pigs is considered the highest quality. The ecoregion's oak species (Quercus ilex, Q. lusitanica, Q. pyrenaica, and Q. suber) produce acorns at different times of the year, so dehesas with diverse oak flora can sustain more pigs.
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.