Definitions for calluna
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Calluna, genus Calluna(noun)
A common European heath / heather of genus Calluna
Calluna vulgaris is the sole species in the genus Calluna in the family Ericaceae. It is a low-growing perennial shrub growing to 20 to 50 centimetres tall, or rarely to 1 metre and taller, and is found widely in Europe and Asia Minor on acidic soils in open sunny situations and in moderate shade. It is the dominant plant in most heathland and moorland in Europe, and in some bog vegetation and acidic pine and oak woodland. It is tolerant of grazing and regenerates following occasional burning, and is often managed in nature reserves and grouse moors by sheep or cattle grazing, and also by light burning. Referred to as Erica in all the old references, Calluna was separated from the closely related genus Erica by Richard Anthony Salisbury, who devised the generic name Calluna from the Greek kallunein, "beautify, sweep clean", in reference to its traditional use in besoms. The specific epithet vulgaris is Latin for 'common'. Calluna is differentiated from Erica by its corolla and calyx each being in four parts instead of five. Calluna has small scale-leaves borne in opposite and decussate pairs, whereas those of Erica are generally larger and in whorls of 3-4, sometimes 5. The flowers emerge in late summer; in wild plants these are normally mauve, but white-flowered plants also occur occasionally. Unlike Erica, Calluna sometimes sports double flowers. Calluna is sometimes referred to as Summer heather to distinguish it from Erica.
U.S. National Library of Medicine
A plant genus of the family ERICACEAE.
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