Bidens beckii

{{short description|Species of plant}}

{{Speciesbox

|image = Bidens beckii drawing 01.png

|image_caption = 1913 illustration1913 illustration from USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. 3 vols. Charles Scribner's Sons, New York. Vol. 3: 500

|status =

|status_system =

|status_ref =

|genus = Bidens

|species = beckii

|authority = Torr. ex Spreng.

|synonyms_ref = [http://www.theplantlist.org/tpl1.1/record/gcc-143773 The Plant List, Bidens beckii Torr. ex Spreng.]

|synonyms = Megalodonta beckii (Torr. ex Spreng.) Greene

|range_map = BIBE2.png

|range_map_caption = Range within North America

}}

Bidens beckii, commonly called Beck's water-marigold or simply water marigold{{PLANTS|id=BIBE|taxon=Bidens beckii|accessdate=28 May 2015}} is a species of flowering plant in the family Asteraceae. It is native to Canada and the northern United States.[http://bonap.net/MapGallery/County/Bidens%20beckii.png Biota of North America Program 2014 county distribution map]Scoggan, H. J. 1979. Dicotyledoneae (Loasaceae to Compositae). Part 4. 1117–1711 pp. In Flora of Canada. National Museums of Canada, OttawaRoberts, M. L. 1985. The cytology, biology and systematics of Megalodonta beckii (Compositae). Aquat. Bot. 21: 99–110.