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UNEP World Conservation Monitoring Centre described garigue as "discontinuous bushy associations of the Mediterranean calcareous plateaus, which have relatively alkaline soils. It is often composed of kermes oak, lavender, thyme, and white cistus. There may be a few isolated trees."
Garigue is discontinuous with widely spaced bush associations with open spaces, and is often extensive. It is associated with limestone and base rich soils, and calcium associated plants.
Aside from dense thickets of kermes oak that punctuate the garigue landscape, juniper and stunted holm oaks are the typical trees; aromatic lime-tolerant shrubs such as lavender, sage, rosemary, wild thyme and Artemisia are common garigue plants.
The aromatic oils and soluble monoterpenes of such herbs leached into garigue soils from leaf litter have been connected with plant allelopathy, which asserts the dominance of a plant over its neighbors, especially annuals, and contributes to the characteristic open spacing and restricted flora in a garigue. The fines (charred wood and smoke residues, or charcoal dust) of periodic brush fires also have had an effect on the patterning and composition of the garigues. Clear summer skies and intense solar radiation have induced the evolution of protective physiologies: the familiar glaucous, grayish-green of garigue landscapes is produced by the protective white hairs and light-diffusing, pebbled surfaces of many leaves typical of garigue plants.
garigue is a common general word for the shrubland habitat ecosystems in southern France along with maquis, which are known elsewhere in the Mediterranean region as matorral and tomillares in Spain, macchia in Italy, phrygana in Greece, garig in Croatia, and batha in Israel.
In California a similar Mediterranean climate ecoregion is named chaparral; in Chile it is named the Chilean matorral; in South Africa it is named fynbos; and in Australia it is named mallee. All are in the Mediterranean forests, woodlands, and scrub biome.
Maquis shrubland is broadly similar to garigue, but the vegetation is more dense, being composed of numerous closely spaced shrubs. Maquis is associated with siliceous (acid) soils, unlike the relatively alkaline calcareous soils of the garigue. Its plant communities are often suites associated with holm oak. Calcifuges such as Erica and Calluna are present in the maquis ecoregion.
Deforestation of the indigenous oak forest since the Late Bronze Age, for cultivation of olives, vines and grain, the introduction of sheep and especially goats and charcoal-making for heat and iron-working, exposed the land surface to weathering and resulted in erosion of the topsoil. The wild garigue, then, is a man-formed landscape. The intensity of grazing pressure has had a direct response in the ecotope, reflected today in the decline of goat-pasturing.
First cited in the French language in 1546, the singular word garigue is borrowed from the Provençal dialect of Occitan garriga, equivalent to old French jarrie. Etymologist Oscar Bloch states that it is most likely related to the Gascon carroc, meaning rock and to the Germanic Swiss Karren, a kind of sedimentary rock. These related words could stem from a supposed carra, or rock, which could be a remnant of a pre-Latin language, to judge from its geographic distribution even before Celtic times, and possibly akin to Basque *karr-, harri, 'rock'. It is thought that Gallic and Latin incorporated these words and then transmitted them in various forms to the Romance languages.
The dense, thrifty growth of garigue flora has recommended many of its shrubs and sub-shrubs for uses as ornamental plants in traditional and drought tolerant gardens. Many shrubs and flowering perennials of the garigue are mainstays of the English "mixed border" of herbaceous and woody plants found in English gardens, and around the world, though often grown under cooler, moister conditions.
Some have become invasive species in the Mediterranean forests, woodlands, and scrub biome's other ecoregions beyond the Mediterranean Basin on other continents, including the California chaparral and woodlands.
Grapes that are grown in the garigues region of France are said to produce wines with a "barnyard" or "earthy" tone, or "the herbal scent of lavender that fills the hills of Provence in the summer time." Some wines bottled in Southern France contain the word garigues as part of their appellation or label name.