pondwort

English

Stratiotes aloides

Zannichellia palustris

Etymology

pond +‎ wort

Noun

pondwort (uncountable)

1. A submerged aquatic plant native to Europe and northwestern Asia (Stratiotes aloides).

   Synonyms: water soldier, water pineapple

   • 1857, Catherine Parr Strickland Traill, The Canadian Settler's Guide, page 208:

     […] and the arrow-shaped leaves of the blue spiked pondwort and rosy flowers of the persicaria, form a beautiful sight on hot sunny days.

   • 1863, Charles Lyell, The geological evidences of the antiquity of man, page 225:

     […] some of the same plants which were enumerated as common in the ancient lignite in 3', such as the yellow water-lily and pondwort […]

2. A plant, horned pondweed, found in fresh to brackish waters, with long, threadlike leaves (Zannichellia palustris).