Robert W. Freckmann Herbarium


  Bidens cernua L. image
Photographer: Richard Bauer           

Botanical Illustration

Botanical Illustration

Hugh H. Iltis

Kitty Kohout

Merel R. Black

Merel R. Black

Scott A. Milburn

Scott A. Milburn

Janice Stiefel

Janice Stiefel

Josh Sulman

Josh Sulman

Josh Sulman

Josh Sulman

Josh Sulman
Family Asteraceae
Bidens cernua L.
nodding beggar-ticks, nodding bur-marigold
Bidens: derived from Latin bis, "twice," and dens, "tooth," hence meaning "2-toothed" and referring to the bristles on the achenes
cernua: Latin for "nodding"
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Native
Plant: erect, annual, 4"-40" tall forb
Flower: head 1 1/4"-2" wide with yellow rays to 1/2" long, center disk to 1/2"-1" wide, leafy bracts usually longer than the disk; inflorescence of many hemispherical heads (often nodding with age) in large, loose, stalked clusters; blooms Aug.-Oct.
Fruit:dry, with 2-4 barbed awns fruit drawing
Leaf:mostly stalkless, undivided but with coarse teeth
Habitat: wet; meadows, marshes, shores
(Glossary)

More Information Natural Communities Herbarium Specimens
All Bidens list Google- Images or Text

Flora of North America (off site)
Synonyms 
Bidens cernua L. f. discoidea (Wimm. & Grab.) Briq. & Cavill.
Bidens cernua L. f. minima (Huds.) Larss.
Bidens cernua L. var. dentata (Nutt.) B.Boivin
Bidens cernua L. var. elliptica Wiegand
Bidens cernua L. var. integra Wiegand
Bidens cernua L. var. minima (Huds.) Pursh
Bidens cernua L. var. oligodonta Fernald & H.St.John
Bidens cernua L. var. radiata DC.
Bidens glaucescens Greene
Bidens minima Huds.

         
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