Flower ID: IMG_1178.JPG-09-16-2018 Flower name (scientific): Bidens cernua Linnaeus PY: 1753. Pronunciation guide: (phonetic spelling) BI-denz (or BYE-denz) SER-new-a Flower name (common): Nodding Bur-Marigold Family name (common): Aster Family name (scientific): Asteraceae Scientific name origin: Genus: From the Latin bis for two and dens a tooth, hence two teeth. Referencing the bristles (two-awned) on the achene (dry one-seeded fruit). Specific epithet: Latin for drooping, nodding, curving forward. Common name origin: Has similarities to the marigold and with seeds that stick to clothes like burrs. Nodding for the sometimes forward curvature of the flower heads. Flower description: Size: 0.8 to 1.5 inches (2.0 to 3.8 cm) Petal count: 6 to 8 ray florets usually, sometimes 0; disc florets typically 40 to 100. Color: yellow Other: flower arrangement, Cluster-flat Plant description: Size: 4 to 40 inches (10 to 102 cm) Stem hairy: Other: Leaf description: attachment is opposite, type is simple Size: Leaves are typically 4 to 10 cm long but may exceed 20 cm in length and typically 0.5 to 2.5 cm wide but may reach up to 4.5 cm in width. Color: Hairy: Other: Shape: leaf, lance-ovate or oblanceolate to lanceolate or linear (FNA) Origin (native, introduced, invasive): Native Status (common, uncommon, threatened, rare): Uncommon Bloom time (typical): August to October Cycle (annual, biennial, perennial): Annual Habitat: Wet soils, streambanks, swamps, marshes, ponds, shores, sun or part shade. Fruit: Seed: Importance to wildlife: Similar species (if any): Some of the Bidens are similar to each other. Flower head size, number of awns on the seed, number of bracts, presence or absence of ray florets, and leaf differences can help ID the seperate species. Some data for Bidens species: B. cernua flower head 25 - 51 mm, 4 awns commonly (2 - 4); B. connata flower 6 - 13 mm, 2 - 4 awns; B. discoidea flower 3 - 8 mm, 2 awns; B. frondosa flower 19 mm, 2 awns; B. trichosperma flower 38 - 51 mm, 2 awns; B. tripartita flower 13 - 19 mm, 3 awns; B. vulgata flower 25 mm, 2 awns. Species B. beckii is aquatic, species B. aristosa is uncommon in Wisconsin, and species B. pilosa can be identified by its white to pinkish ray florets. Ethnobotany: Latitude: 44.800178 Longitude: -91.508242 Altitude: 230.50 Distribution: In Wisconsin: (Adams, Ashland, Barron, Bayfield, Brown, Buffalo, Burnett, Calumet, Chippewa, Clark, Columbia, Crawford, Dane, Dodge, Door, Douglas, Dunn, Eau Claire, Florence, Fond du Lac, Forest, Grant, Green, Green Lake, Iowa, Iron, Jackson, Jefferson, Juneau, Kenosha, Kewaunee, La Crosse, Lafayette, Langlade, Lincoln, Manitowoc, Marathon, Marinette, Marquette, Menominee, Milwaukee, Monroe, Oconto, Oneida, Outagamie, Ozaukee, Pierce, Polk, Portage, Price, Racine, Richland, Rock, Rusk, Sauk, Sawyer, Shawano, Sheboygan, St. Croix, Taylor, Trempealeau, Vernon, Vilas, Walworth, Washburn, Washington, Waukesha, Waupaca, Waushara, Winnebago, Wood) Click here for distribution map In US: (AK, AL, AR, AZ, CA, CO, CT, DC, DE, GA, IA, ID, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MT, NC, ND, NE, NH, NJ, NM, NV, NY, OH, OK, OR, PA, RI, SD, TN, TX, UT, VA, VT, WA, WI, WV, WY) Click here for distribution map In Canada: (AB, BC, MB, NB, NS, NT, ON, PE, QC, SK, YT) Click here for distribution map References: Synonym(s): Basionym: na Homotypic Synonym(s): POWO lists 1 homotypic synonym for this species. Heterotypic Synonym(s): POWO lists 37 heterotypic synonyms for this species. Autonym: na Wetland Status (NC): OBL Wetland Status (MW): OBL