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a genus of plants of the family Fumariaceae. They are annual herbs with alternate, narrowly dissected leaves. The corollas are rose-violet, sometimes white, with a single short spur, and there are two stamens. The fruit is nutlike. There are about 55 species in Europe, growing chiefly in the Mediterranean region, in the Caucasus, in Asia (as far as Central Asia and the Himalayas), and in Africa. In the USSR there are ten species. The best known species is fumitory (F. officinalis), with grayish leaves that appear smoky and rose-violet blossoms. This species may be found primarily in the forest zone of the European part of the USSR and in Western Siberia, where it grows in fields, on fallow, and in gardens. Fumitory, which contains fumaric acid, has been used in folk medicine.