tape grass

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. See eelgrass.

Century Dictionary and Cyclopedia

1. n. An aquatic plant, Vallisneria spiralis.

GNU Webster's 1913

1. n. (Bot.) a plant (Vallisneria spiralis) with long ribbonlike leaves, growing in fresh or brackish water; -- called also fresh-water eelgrass, and, in Maryland, wild celery.

WordNet 3.0

1. n. submerged aquatic plant with ribbonlike leaves; Old World and Australia