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pondweed

ˈpondweed
  [f. pond n. + weed.]
  An aquatic herb that grows in ponds and still waters: spec. in Great Britain, the species of Potamogeton. With distinguishing prefix applied to other aquatic plants; as American pondweed, Canadian pondweed, or Choke P., Elodea canadensis (Anacharis Alsinastrum); Cape P., Aponogeton distachyon; Horned pondweed or Triple-headed P., Zannichellia palustris; Tassel P., Ruppia maritima (Treas. Bot. 1866).

1578 Lyte Dodoens i. lxxi. 104 The first..of these kindes of floting herbes..is called water spyke, or most commonly Pondeweede. 1657 S. Purchas Pol. Flying-Ins. i. xv. 94 Pondweed with a flower like Patience. 1760 J. Lee Introd. Bot. App. 323 Pond-weed, Potamogiton. Ibid., Pond-weed, Triple-headed, Zannichellia. 1789 J. Pilkington View Derbysh. I. 344 Potamogeton natans. Broad-leaved Pond-weed. 1855 Kingsley Glaucus (1878) 206 Some of the more delicate pond-weeds, such as Callitriche, Potamogeton pusillum. 1866 Treas. Bot., Zannichellia palustris, the Horned Pondweed. 1897 Westm. Gaz. 22 Nov. 2/1 In the stream,..the creamy Cape pond weed sent out the delicious perfume from its quaint large flowers. 1901 Ibid. 26 Nov. 12/2 The career of the Canadian pondweed (Anacharis alsinastrum..) is interesting because of the extraordinary rapidity with which it spreads itself throughout the country. 1902 Ibid. 17 Oct. 10/1 The American pondweed seems to be playing havoc with angling in Loch Leven.

Oxford English Dictionary

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