Authentic Wisconsin.  Canadian Lousewort - Pedicularis canadensis


Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 17, 2022.

Above: Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 17, 2022.


Canadian Lousewort - Pedicularis canadensis

Canadian Lousewort produces a broad whorl of tubular, yellow (sometimes reddish) hooded flowers on top of a segmented stalk. The flowers are 5-parted and about 3/4" - 1" long. The lower flower lip may be a lighter yellow or white in color. The flowers grow in a whirl around a conical spike that elongates with age.

This native flower grows in areas with dry to moderate moisture such as prairies, woods and forests.

Blooms April - June.

Other names include: Wood Betony, Forest lousewort.


Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 19, 2022.

Above: Canadian Lousewort leaves and stems in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 19, 2022. The leaves sometimes appear to be semi-evergreen, often reddish in spring or in full-sun.


For more information on Canadian Lousewort, visit Wikipedia.

Or, visit the UW-Madison Wisconsin State Herbarium website page about Canadian Lousewort - Pedicularis canadensis.


Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 17, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 17, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 17, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 17, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 17, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 17, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 17, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 19, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 19, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 19, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 19, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 19, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 19, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 19, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 19, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 19, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 19, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 19, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 19, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 19, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 19, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 19, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 19, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 19, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 19, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 19, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 19, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 19, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 19, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 19, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 21, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 21, 2022.
Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 21, 2022.

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Wisconsin Wildflowers


Canadian Lousewort
Pedicularis canadensis


Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 17, 2022.

Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 17, 2022.

Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 17, 2022.


Above: Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin (5/17/22)


Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 19, 2022.

Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 19, 2022.

Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin on May 19, 2022.


Above: Canadian Lousewort in UW Arboretum's Curtis Prairie in Madison, Wisconsin (5/19/22)


Canadian Lousewort (Pedicularis canadensis) specimen collected on May 28, 2015 in Douglas County one mile south of Cedar Island Airport.

Above: Canadian Lousewort (Pedicularis canadensis) specimen collected on May 28, 2015 in Douglas County one mile south of Cedar Island Airport.



1913 line drawing of Pedicularis canadensis.

Above: 1913 line drawing of Pedicularis canadensis.



Pedicularis canadensis line drawing from USDA  NRCS, Wetland flora Field office illustrated guide.

Above: Pedicularis canadensis line drawing from USDA NRCS, Wetland flora: Field office illustrated guide to plant species., USDA NRCS National Wetland Team.



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