noun[mass noun] chiefly North American
A plant of the dock family, typically having slender leaves and a short spike of tiny compact flowers.
- Genus Polygonum, family Polygonaceae: several species.
- The list of weed species includes: morninglory, bindweed, buckwheat, Pennsylvania smartweed, Venice mallow, sweet clover, velvetleaf, lamb's quarters, and nightshade.
- It also controls certain broadleaf weeds, including Powell amaranth, jimsonweed, annual morningglory, redroot pigweed, Pennsylvania smartweed, common sunflower and wild mustard.
- A mixture of glyphosate plus an herbicide will improve control of prickly lettuce, dandelion, marestail, giant and common ragweed, Pennsylvania smartweed, velvetleaf, mustard species, and other broadleaf weeds.
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