Agalla de quercus faginea (II)

Quercus faginea, the Portuguese Oak, is a species of oak native to the western Mediterranean region in the Iberian Peninsula and the Balearic Islands. Similar trees in the Atlas Mountains of northwest Africa are usually included in this species, or sometimes treated as a distinct species Quercus tlemcenensis. It occurs in mountains between 0-1900 metres altitude, and flourishes in a variety of soils and climates.

It is a medium-sized deciduous or semi-evergreen tree growing to 20 m tall, with a trunk up to 80 cm diameter, with grey-brown bark. The tree can live as long as 600 years. The leaves are 4-10 cm long and 1.2-4 cm broad (rarely to 15 cm long and 5 cm broad), glossy dark green to grey-green above, and variably felted grey-white below; the margins have 5-12 pairs of irregular teeth. Leaf fall is typically in mid to late winter. The flowers are catkins, produced between March and April, almost always before Holm Oak, which grows in similar areas. The acorns are oblong-ovoid, 2-2.5 cm long, maturing in 6 months to disperse in September or October.

The species commonly develops galls due to gall wasp activity; the galls are brown, 1-2 cm diameter, and have a spongy, cork-like interior.

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.