any of several chickweeds; esp., an Old World perennial (Stellaria holostea) with grasslike leaves
See stitchwort in American Heritage Dictionary 4
stitch·wort
noun
Any of several low-growing plants of the genus Stellaria, having opposite leaves and small, white, star-shaped flowers.
Origin: Middle English, from Old English sticwyrt, agrimony : stice, stich (from its alleged ability to cure sharp pains in the side); see stitch + wyrt, plant; see wort1.