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A category of classification ranking between the family and the species.

For example, the several species of oak collectively form the genus Quercus; of daylilies, the several species plus the many cultivars form the genus Hemerocallis; of horses, asses (note the comma between the two preceding words) and zebras, the genus Equus.

See Hemerocallis

Plural: genera.

© Copyright 2000, 2007, 2012 by the American Hemerocallis Society, Inc.
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