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Any of about 100 species of annual and perennial flowering carnivorous plants in four genera, notably Drosera, that make up the family Droseraceae (sundew family). Sundews are found throughout tropical and temperate regions. Their leaves are usually in a basal rosette. Both leaf surfaces are generally covered with sticky, gland-tipped hairs and sensitive tentacles that trap insects. After the trapped prey has been digested by enzymes secreted by the tentacles, the leaf reopens, resetting the trap. The best-known sundew is the Venus's-flytrap. See alsopitcher plant.
This entry comes from Encyclopædia Britannica Concise. For the full entry on sundew, visit Britannica.com.