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Japanese knotweed flowers are valued by some beekeepers as an important source of nectar for honeybees, at a time of year when little else is flowering. Japanese knotweed yields a monofloral honey, usually called bamboo honey by northeastern U.S. beekeepers, like a mild-flavored version of buckwheat honey (a related plant also in the Polygonaceae).
Reynoutria sachalinensis, the giant knotweed or Sakhalin knotweed, (syns. Polygonum sachalinense , Fallopia sachalinensis ) is a species of Fallopia native to northeastern Asia in northern Japan ( Hokkaidō , Honshū ) and the far east of Russia ( Sakhalin and the southern Kurile Islands ).
Persicaria amphibia (syn. Polygonum amphibium) is a species of flowering plant in the knotweed family known by several common names, including longroot smartweed, water knotweed, water smartweed, and amphibious bistort.
Illustration from the Japanese agricultural encyclopedia Seikei Zusetsu (1804) Persicaria is a genus of herbaceous flowering plants in the knotweed family, Polygonaceae. Plants of the genus are known commonly as knotweeds [2]: 436 or smartweeds. [3] It has a cosmopolitan distribution, with species occurring nearly worldwide.
Knotweed is a common name for plants in several genera in the family Polygonaceae. Knotweed may refer to: Fallopia; Persicaria; Polygonum; Reynoutria. Reynoutria japonica or Japanese knotweed, a highly invasive species in Europe and North America
Asian knotweed, crimson beauty, donkey rhubarb, fleeceflower, German sausage, Japanese bamboo, Japanese fleece flower, Japanese knotweed, Japanese polygonum, kontiki bamboo, Mexican bamboo, pea-shooter plant, reynoutria fleece flower, sally rhubarb Invasive in Europe, New Zealand, and North America. Native to Japan. Rhinella marina [m] Amphibian
Persicaria capitata, the pink-headed persicaria, [2] pinkhead smartweed, [3] pink knotweed, Japanese knotweed, or pink bubble persicaria, is an Asian species of plants in the genus Persicaria within the Polygonaceae (US: buckwheat) family.
Persicaria hydropiper (syn. Polygonum hydropiper), also known as water pepper, marshpepper knotweed, arse smart [2] or tade, is a plant of the family Polygonaceae. A widespread species, Persicaria hydropiper is found in Australia, New Zealand, temperate Asia, Europe and North America.