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Any of various plants of the genera Persicaria and Polygonum, having sheathlike stipules and small, densely clustered pink, white, or green flowers.


(Plants) any of several perennial aquatic plants of the genus Polygonum. Also called: water pepper



any of several weeds belonging to the genus Polygonum, of the buckwheat family, that have a smarting, acrid juice.
References in classic literature ?
I used to love to drift along the pale-yellow cornfields, looking for the damp spots one sometimes found at their edges, where the smartweed soon turned a rich copper colour and the narrow brown leaves hung curled like cocoons about the swollen joints of the stem.
I quickly reminded myself that the object of my admiration was a weed: smartweed.
Polygonaceae is the family of flowering plants known as knotweed or smartweed.
Instead of forest floors carpeted by picturesque arrays of trout lily or bloodroot, we have dense and oppressive monocultures of the ubiquitous garlic mustard, smartweed, Asiatic dayflower and Japanese stilt grass.
As a result, in 2011 we banded at Cattail Lakes, where a limited amount of wetland vegetation dominated by smartweed (Persicaria pensylvanica) and golden-fruited dock (Rumex chrysocarpus) was used by yellowthroats.
When water levels are high these shallow ponds are filled with aquatic vegetation like smartweed, sedge, duck potato, widgeon grass and wild millet.
Other prey items of interest, but that were rarely found in the diet, included glass shrimp (Palaemonetes kadiakensis), smartweed (Polygonum spp.
This opens the door for mat punchin'--heavy-duty, hand-tofin combat, especially where plants include gnarly alligatorweed, smartweed, or pennywort, or heavily matted milfoil and hydrilla.
He directed my attention to the cattails and swamp smartweed and searched for some purple prairie clover, which he was determined to have me smell.
While hunting a small pothole surrounded by woods, I shot a gadwall that sailed across the water and pitched into a jungle of downed timber, dried water lily stalks and smartweed.
walkeri were collected at the margin of the Lake in what the author described as "a dense smartweed swamp.
Without looking up from the pale smartweed Bud said, "Come in.