Prunella

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Prunella

 

a genus of perennial herbs of the family Labiatae. The opposite leaves range from entire to pinnatipartite. The flowers are in false whorls that form a dense spicate inflorescence; the corolla has an arched upper lip. The fruit consists of four nutlike lobes. There are five to seven species, distributed in temperate and subtropical zones of the northern hemisphere. The USSR has four species. Self-heal (P. vulgaris), with tiny violet flowers, is common along roads and in glades, forest margins, sparse forests, meadows, fields, and wastelands. P. grandiflora, with large violet or reddish flowers, occurs in the European USSR, mainly in the south, and in the Caucasus; it is cultivated as an ornamental.