Starwort \Star"wort`\, n. (Bot.)
   (a) Any plant of the genus Aster. See Aster.
   (b) A small plant of the genus Stellaria, having star-shaped flowers; star flower; chickweed. --Gray.

Water starwort, an aquatic plant (Callitriche verna) having some resemblance to chickweed.

Yellow starwort, a plant of the genus Inula; elecampane.

Source: Webster's Revised Unabridged Dictionary (1913)