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A variegated variety of Japanese knotweed, used as a landscape plant. 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 ...
Reynoutria is a genus of flowering plants in the Polygonaceae, also known as the knotweed or buckwheat family.The genus is native to eastern China, Eastern Asia and the Russian Far East, although species have been introduced to Europe and North America. [1]
In the UK, the plant was first introduced in 1839, at the same time as giant hogweed and Japanese knotweed. [20] [21] These plants were all promoted at the time as having the virtues of "herculean proportions" and "splendid invasiveness" which meant that ordinary people could buy them for the cost of a packet of seeds to rival the expensive ...
Reynoutria sachalinensis is a herbaceous perennial plant growing to 2–4 m (79–157 in) tall, with strong, extensively spreading rhizomes forming large clonal colonies. The leaves are some of the largest in the family, up to 15–40 cm (6–15.5 in) long and 10–28 cm (4–11 in) broad, nearly heart-shaped, with a somewhat wavy, crenate margin.
Reynoutria multiflora (syn. Fallopia multiflora and Polygonum multiflorum) is a species of flowering plant in the buckwheat family Polygonaceae [1] native to central and southern China. [2] [3] It is known by the English common names tuber fleeceflower [4] and Chinese (climbing) knotweed. It is known as he shou wu (何首烏) in China and East ...
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.
Polygonum is a genus of about 130 species of flowering plants in the buckwheat and knotweed family Polygonaceae. Common names include knotweed and knotgrass (though the common names may refer more broadly to plants from Polygonaceae). In the Middle English glossary of herbs Alphita (c. 1400–1425), it was known as ars-smerte.
Aphalara itadori, the Japanese knotweed psyllid, is a species of psyllid from Japan which feeds on Japanese knotweed (Reynoutria japonica).. The UK Government licensed the use of this species as a biological control to counter the spread of Japanese knotweed in England; this was the first time that biological control of a weed was sanctioned in the European Union.