Flower ID: IMG_9768.JPG-09-26-2021 Flower name (scientific): Reynoutria japonica Houttuyn PY: 1777. Pronunciation guide: (phonetic spelling) rey-NU-tre-a (or ray-NU-tree-ah) juh-PON-ih-kuh Flower name (common): Japanese Knotweed Family name (common): Buckwheat Family name (scientific): Polygonaceae Scientific name origin: Genus: Named to honor Karel van Sint-Omaars (also known as Charles de Saint Omer) (1533–1569), whose title was Lord of Reynoutre (or Baron Van Reynoutre). Specific epithet: Latin for of or from Japan. Common name origin: The species is native to Japan and nearby countries, and a member of the Polygonaceae family, which is sometimes referred to as the knotweed family. Flower description: Size: 0.1 to 0.2 inches (3 to 5 mm) Petal count: 5 Color: white Other: flower arrangement, Panicle Plant description: Size: 48 to 120 inches (1.2 to 3 m) Stem hairy: Other: Leaf description: attachment is alternate, type is simple Size: Color: Hairy: Other: Shape: leaf, broadly ovate (IL), tapered to a sharply pointed tip (MB). Origin (native, introduced, invasive): Invasive/Restricted in Wisconsin Status (common, uncommon, threatened, rare): Common Bloom time (typical): August to September Cycle (annual, biennial, perennial): Perennial Habitat: Disturbed areas, waste areas, streambanks, fields, sun or semi shade, moist. Fruit: Seed: Importance to wildlife: Similar species (if any): No close lookalikes. Reynoutria sachalinensis (Giant Knotweed) has some resemblance at first glance, but this is typically a much taller plant (2 to 4 m) and has larger leaves. Ethnobotany: Latitude: 44.805820 Longitude: -91.499635 Altitude: 236.70 Distribution: In Wisconsin: (Ashland, Bayfield, Brown, Calumet, Columbia, Dane, Dodge, Door, Douglas, Dunn, Eau Claire, Fond du Lac, Forest, Grant, Green, Iowa, Kenosha, La Crosse, Langlade, Marinette, Marquette, Milwaukee, Oconto, Oneida, Pepin, Portage, Price, Racine, Richland, Rock, Rusk, Sauk, Sheboygan, Taylor, Vernon, Vilas, Walworth, Waukesha, Winnebago, Wood) Click here for distribution map In US: (AK, AR, CA, CO, CT, DC, DE, GA, IA, ID, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MS, MT, NC, NE, NH, NJ, NY, OH, OK, OR, PA, RI, SC, SD, TN, UT, VA, VT, WA, WI, WV) Click here for distribution map In Canada: (BC, MB, NB, NF, NS, ON, PE, QC) Click here for distribution map References: Synonym(s): Basionym: na Homotypic Synonym(s): POWO lists 4 homotypic synonyms for this species. Heterotypic Synonym(s): POWO lists 31 heterotypic synonyms for this species. Autonym: na Wetland Status (NC): FACU Wetland Status (MW): FACU