''Hedera hibernica'', the Atlantic ivy or Irish ivy, is a species of

ivy ''Hedera'', commonly called ivy (plural ivies), is a genus of 12–15 species of evergreen climbing or ground-creeping woody plants in the family Araliaceae, native to Western Europe, Central Europe, Southern Europe, Macaronesia, northwestern ...

native to the Atlantic coast of Europe.

Description

It is an

evergreen In botany, an evergreen is a plant which has Leaf, foliage that remains green and functional throughout the year. This contrasts with deciduous plants, which lose their foliage completely during the winter or dry season. Consisting of many diffe ...

climbing plant, growing to 20–30 m high where suitable surfaces (

tree In botany, a tree is a perennial plant with an elongated stem, or trunk, usually supporting branches and leaves. In some usages, the definition of a tree may be narrower, e.g., including only woody plants with secondary growth, only ...

cliff In geography and geology, a cliff or rock face is an area of Rock (geology), rock which has a general angle defined by the vertical, or nearly vertical. Cliffs are formed by the processes of weathering and erosion, with the effect of gravity. ...

wall A wall is a structure and a surface that defines an area; carries a load; provides security, shelter, or soundproofing; or serves a decorative purpose. There are various types of walls, including border barriers between countries, brick wal ...

s) are available, and also growing as ground cover where there are no vertical surfaces. It climbs by means of

aerial root Aerial roots are Root, roots growing above the ground. They are often Plant development#Adventitious structures, adventitious, i.e. formed from nonroot tissue. They are found in diverse plant species, including epiphytes such as orchids ('' ...

lets which cling to the substrate. Native to the Atlantic region, it has been cultivated and can appear in the wild outside its original area, along the Atlantic coast from

Portugal Portugal, officially the Portuguese Republic, is a country on the Iberian Peninsula in Southwestern Europe. Featuring Cabo da Roca, the westernmost point in continental Europe, Portugal borders Spain to its north and east, with which it share ...

Spain Spain, or the Kingdom of Spain, is a country in Southern Europe, Southern and Western Europe with territories in North Africa. Featuring the Punta de Tarifa, southernmost point of continental Europe, it is the largest country in Southern Eur ...

France France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...

Ireland Ireland (, ; ; Ulster Scots dialect, Ulster-Scots: ) is an island in the North Atlantic Ocean, in Northwestern Europe. Geopolitically, the island is divided between the Republic of Ireland (officially Names of the Irish state, named Irelan ...

Great Britain Great Britain is an island in the North Atlantic Ocean off the north-west coast of continental Europe, consisting of the countries England, Scotland, and Wales. With an area of , it is the largest of the British Isles, the List of European ...

Germany Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu ...

Scandinavia Scandinavia is a subregion#Europe, subregion of northern Europe, with strong historical, cultural, and linguistic ties between its constituent peoples. ''Scandinavia'' most commonly refers to Denmark, Norway, and Sweden. It can sometimes also ...

and the

Baltic Sea The Baltic Sea is an arm of the Atlantic Ocean that is enclosed by the countries of Denmark, Estonia, Finland, Germany, Latvia, Lithuania, Poland, Russia, Sweden, and the North European Plain, North and Central European Plain regions. It is the ...

. One way in which it differs from ''

Hedera helix ''Hedera helix'', the common ivy, European ivy, King's Choice ivy, or just ivy, is a species of flowering plant in the family Araliaceae. It is native to most of Europe and parts of western Asia. Ivy is a clinging evergreen vine that grows on t ...

'' (common ivy) is that the light veins on its leaves are less pronounced. The bark is first green, but soon after it becomes gray. Old branches are light gray with a finely furrowed bark. Buds are almost hidden by the leaf base, egg-shaped and bright green. The leaves have entire margins and are ovoid or with five triangular lobes. The surface is glossy dark green with light ribs, while the underside is pale green. The leaves of flowering shoots are, however, oval with entire margins. Flowering occurs in September–October. The fruits are blue-black berries. The whole plant and also the berries are slightly poisonous.

Cultivation

The plant has an attractive and elegant aspect. It is quite common in gardening, and has gained the

Royal Horticultural Society The Royal Horticultural Society (RHS), founded in 1804 as the Horticultural Society of London, is the UK's leading gardening charity. The RHS promotes horticulture through its five gardens at Wisley (Surrey), Hyde Hall (Essex), Harlow Carr ...

Award of Garden Merit The Award of Garden Merit (AGM) is a long-established award for plants by the British Royal Horticultural Society (RHS). It is based on assessment of the plants' performance under UK growing conditions. It includes the full range of cultivated p ...

. Like the related '' H. helix'' (English ivy), ''H. hibernica'' is an invasive weed in parts of North America with mild winters: in a recent study, 83% of 119 populations of invasive ivy sampled in the

Pacific Northwest The Pacific Northwest (PNW; ) is a geographic region in Western North America bounded by its coastal waters of the Pacific Ocean to the west and, loosely, by the Rocky Mountains to the east. Though no official boundary exists, the most common ...

were found to be ''H. hibernica'' and not ''H. helix'' as was previously thought. In fact it can be troublesome in any garden, rapidly colonising hedges, trees and borders if not kept in check.

Ecology

It requires consistently moist soil, and can grow in any light environment from full sun to deep shade. Its natural habitat is forest or dense bush which is cool and cloud-covered for much of the year, such as is often found in mountainous regions near the ocean. It prefers well-drained or

alkaline In chemistry, an alkali (; from the Arabic word , ) is a basic salt of an alkali metal or an alkaline earth metal. An alkali can also be defined as a base that dissolves in water. A solution of a soluble base has a pH greater than 7.0. The ...

soils rich in nutrients and

humus In classical soil science, humus is the dark organic matter in soil that is formed by the decomposition of plant and animal matter. It is a kind of soil organic matter. It is rich in nutrients and retains moisture in the soil. Humus is the Lati ...

. In areas to which it has been introduced it may be a noxious weed or be invasive. In the autumn its flowers are an important source of nectar for many insects, including the ivy bee

Colletes hederae ''Colletes hederae'', the ivy bee, is a species of plasterer bee belonging to the family Colletidae subfamily Colletinae. Taxonomy These mining bees have been only recently described (Schmidt & Westrich 1993) as a distinct species. Until then ...

. The berries are a source of winter food for Common wood pigeons, thrushes,

Common blackbird The common blackbird (''Turdus merula'') is a species of true thrush. It is also called the Eurasian blackbird (especially in North America, to distinguish it from the unrelated New World blackbirds), or simply the blackbird. It breeds in Europ ...

s and the

Eurasian Blackcap The Eurasian blackcap (''Sylvia atricapilla'') is a bird usually known simply as the blackcap. It is a common and widespread typical warbler. It has mainly olive-grey upperparts and pale grey underparts, and differences across the five subspec ...

. Some species of small bird use the niches it provides as nest sites.

References

{{Taxonbar, from=Q947920 hibernica Taxa named by Pierre Antoine Poiteau