Drosera species, distributed worldwide but most abundantly in Australia, occur for the most part in wet, boggy places with a sandy acid soil; they are predominantly perennials. The small, nodding, five-petaled white or pinkish flowers are borne on one side of a curving stem, 10 to 25 cm (4 to 10 inches) tall, which rises from a rosette of usually basal leaves. The roundish, often reddish-stalked basal leaves, less than 2.5 cm (1 inch) in diameter, are covered with gland-tipped hairs that exude a sticky substance attractive to insects. Insects are captured by flexible stalked glands on the upper surface of the leaf, and eventually become engulfed by a web of sticky glands (see photograph-->). After the trapped prey has been digested by enzymes secreted by the tentacles, the leaf reopens, resetting the trap.