Robert W. Freckmann Herbarium


Because of technology changes and personnel changes at UWSP and the Wisconsin State Herbarium, the database of plant species housed at this site was merged with the database from the OLD WisFlora website to create a new Flora of Wisconsin website at Currently we are encouraging all Wisplant viewers to begin using the Flora of Wisconsin website as soon as possible. Wisplants will remain operational through July 13th. After that date, all traffic to Wisplants will be redirected to the Flora of Wisconsin website.

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  Bidens frondosa L. image
Photographer: Paul Drobot           

Botanical Illustration

Botanical Illustration

Emmet J. Judziewicz

Hugh H. Iltis

Matthew L. Wagner

Merel R. Black

Paul Drobot

Robert W. Freckmann
Family Asteraceae
Bidens frondosa L.
common beggar-ticks, devil's beggar-ticks
Bidens: derived from Latin bis, "twice," and dens, "tooth," hence meaning "2-toothed" and referring to the bristles on the achenes
frondosa: leafy
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Native
Plant: erect, annual, 8"-48" tall, mostly smooth forb
Flower: head with an orange to greenish-brown disk 1/3" wide, usually without rays, 5-9 leafy bracts usually longer than the disk; inflorescence a few long-stalked heads; blooms June-Oct.
Fruit:flat, brown to black, often hairy with 2-barbed awnsfruit drawing
Leaf:stalked, 3-5 pinnately-divided into lance-like, toothed, pointed leaflets
Habitat: wet to moist; disturbed areas

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

Flora of North America (off site)
Bidens comos (A.Gray) Wiegand X B. frondosa L.
Bidens frondosa L. f. anomala (Porter ex Fernald) Fernald
Bidens frondosa L. var. anomala Porter ex Fernald
Bidens frondosa L. var. caudata Sherff
Bidens frondosa L. var. frondosa
Bidens frondosa L. var. pallida Wiegand
Bidens frondosa L. var. puberula Wiegand
Bidens frondosa L. var. stenodonta Fernald & H.St.John

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