The Collaborative International Dictionary of English v.0.48:

Lustwort \Lust"wort`\ n. (Bot.)
   See Sundew.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Sundew \Sun"dew`\, n. (Bot.)
   Any plant of the genus Drosera, low bog plants whose leaves
   are beset with pediceled glands which secrete a viscid fluid
   that glitters like dewdrops and attracts and detains insects.
   After an insect is caught, the glands curve inward like
   tentacles and the leaf digests it. Called also lustwort.
   [1913 Webster]