Domestic Encyclopædia (1802)/Pond-Weed

POND-WEED, the Broad-leaved, or Potamogeton natans, L. an indigenous perennial plant, growing in ponds and slow rivers; flowering in the months of July and August.—The leaves of this weed float upon the surface of the water, and thus afford an agreeable shade to fish: its roots are said to be exceedingly grateful to swans.