Quercus lusitanica

Quercus lusitanica, commonly known as gall oak, Lusitanian oak, or dyer's oak, is a species of oak native to Portugal, Spain and Morocco. Quercus lusitanica is the source of commercial nutgalls. These galls are produced by the infection from the insect Cynips gallae tinctoriae. They are used for dyeing.

Description

Quercus lusitanica is a stoloniferous shrub, usually prostrate, under 3 m in height. == Taxonomy ==

Taxonomy

It was incorrectly named Q. humilis, later Q. fruticosa and its current name was incorrectly used to identify other Gall oaks from the Iberian Peninsula and North Africa. This resulted in numerous taxonomy errors in the Gall oaks taxa from the occidental and oriental Mediterranean Basin. ==Distribution and habitat==

Distribution and habitat

Quercus lusitanica is native to the Iberian Peninsula (in Portugal and western Andalusia, Spain, also rare on Galicia) and Morocco It is commonly associated in oak and pine forests and does well in acidic soils. It is relatively sensitive to cold temperatures It inhabits sandy or gravelly soils up to in elevation. ==Threats==

Threats

No serious threats were found in Portugal, though in Andalusia this plant has been listed as Near Threatened due to fires, silviculture and grazing ungulates. The main threat to the conservation of genetic diversity of this species is the hybridization with the oak neighbors (Holm Oak, Cork Oak, Kermes Oak, Pyrenean Oak). ==References==

Source: Wikipedia ↗

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