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Holm Oak
Quercus ilex
NW EuropeEvergreenAngiospermLarge (30m or more)
Introduction

Often easy to spot in the countryside as one of the few evergreen large broadleaved trees , and particularly common in formal planting schemes in country estates. Introduced to Britain and Ireland in the late sixteenth century; a neophyte.

Distribution

Native to southern Europe, including France, Portugal, Spain and Italy, and the Balkans. Less frequent in Scotland and away from coast.

Biology

Monoecious. Wind-pollinated. Animal-dispersed.

Identification

An evergreen broadleaf to 30m, broad-crowned with ascending branches. Bark dark with small square plates. Twigs densely downy for the first year or two. Leaves glossy, 4-12cm, oblong-lanceolate, wavy-margined, the young ones spiny-lobed like Holly (hence the epithet) but less so on older branches, dark green above with pale felty undersides. Male catkins golden-yellow in spring. Fruit a dumpy acorn (20mm), half-enclosed by a felted cupule on a downy peduncle.

Culture

Tolerant of pollution and salt-laden winds, even sea spray. Can be clipped into hedges and topiary, but left alone grows a large spreading canopy. Severely cold winters can lead to leaf drop.

Biodiversity

Its evergreen canopy provides shelter to wildlife all year round, while its catkins provide a source of nectar for insects in spring, and birds and mammals consume its acorns.

Threats

Generally healthy. May thrive in warmer, drier summers projected under a changing climate for some areas of north-west Europe.

Uses

Ornamental, either as a specimen tree or for impressive avenues. Timber is low value.

Key
Native statusNW Europe
Foliage typeEvergreen
Tree groupAngiosperm
Size classLarge (30m or more)
Conservation status (IUCN)No category recorded
Classification
DivisionAngiospermae
OrderFagales
FamilyFagaceae