Flower ID: IMG_9727.JPG-09-26-2021 Flower name (scientific): Rorippa palustris (Linnaeus) Besser PY: 1821. Pronunciation guide: (phonetic spelling) ro-RIP-uh pal-US-triss Flower name (common): Bog Yellow-cress Family name (common): Mustard Family name (scientific): Brassicaceae Scientific name origin: Genus: From the old Saxon rorippen. A name used by the German physician and botanist Euricius Cordus (1486–1535) in his work Botanologicon, published in 1534, referring to an unknown Saxon weed, grass, or young plant. Specific epithet: Latin for swampy ground, referring to the web habitat where the plant is often found. Common name origin: Bog for the wet habitat where the plant frequents, and yellow for the flower color. Cress has a very long history, used for mostly edible cruciferous plants. Flower description: Size: 0.1 to 0.2 inches (3 to 5 mm) Petal count: 4 Color: yellow Other: flower arrangement, Raceme Plant description: Size: 18 to 40 inches (46 to 102 cm) Stem hairy: Other: Leaf description: attachment is alternate, type is simple and lobed Size: Color: Hairy: Other: Shape: leaf, lyrate-pinnatisect (FNA) Origin (native, introduced, invasive): Native Status (common, uncommon, threatened, rare): Uncommon Bloom time (typical): May to October Cycle (annual, biennial, perennial): Annual/Biennial Habitat: Streambanks, bogs, swamps, marshlands, mudflats, lake and pond margins, disturbed wetlands, sun or semi-shade, wet soils. Fruit: Seed: Importance to wildlife: Similar species (if any): Rorippa palustris can be distinguished from other Rorippa species in part by flower size. R. palustris has flowers about 3 mm wide, Rorippa sinuata (Spreading Yellow-cress) and Rorippa sylvestris (Creeping Yellow-cress) both have flowers about 6 mm wide, and Rorippa sessiflora (Sessile-Flowered Yellow Cress) has flowers less than 3 mm wide. Rorippa sylvestris has slender fruits about 10 to 20 mm long and 1 to 1.3 mm wide, Rorippa sinuata has fruits about 5 to 12 mm long and 1.5 to 2.5 mm wide, Rorippa sessiliflora has fruits about 6 to 9 mm long and 1.8 to 2.8 mm wide, whereas Rorippa palustris has fruits about 4 to 10 mm long and 1.7 to 3 mm wide. Rorippa palustris is the most widely distribued of the Rorippa species found in Wisconsin. Ethnobotany: Latitude: 44.802977 Longitude: -91.498612 Altitude: 241.20 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, 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, Waukesha, Waupaca, Waushara, Winnebago, Wood) Click here for distribution map In US: (AK, AL, AR, AZ, CA, CO, CT, DC, DE, FL, GA, IA, ID, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MS, MT, NC, ND, NE, NH, NJ, NM, NV, NY, OH, OK, OR, PA, RI, SC, SD, TN, TX, UT, VA, VT, WA, WI, WV, WY) Click here for distribution map In Canada: (AB, BC, LB, MB, NB, NF, NS, NT, ON, PE, QC, SK, YT) Click here for distribution map References: Synonym(s): Basionym: Sisymbrium amphibium var. palustre Linnaeus Sp. Pl. 2: 657. 1753. Homotypic Synonym(s): Heterotypic Synonym(s): Autonym: na Wetland Status (NC): OBL Wetland Status (MW): OBL