PROTECTING WISCONSIN'S BIODIVERSITY

 
 
   
 
Scientific Name Common Name Global Rank State Rank Federal Status WI Status

Lake Huron Tansy (Tanacetum bipinnatum ssp. huronense)

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Photo by Kitty Kohout

 

Counties with Mapped NHI Occurrences

Lake Huron Tansy (Tanacetum bipinnatum ssp. huronense), a Wisconsin Endangered plant, is found along the Lake Michigan shore, including sandy beaches, dunes, and limestone pavements. Blooming occurs late-June through early-August, fruiting late-July through late-August. The optimal identification period for this species is late-June through early-September.

Chrysanthemum bipinnatum ssp. huronense, Tanacetum huronense, Tanacetum huronense var. bifarium, Tanacetum huronense var. floccosum, Tanacetum huronense var. huronense, Tanacetum huronense var. johannense, Tanacetum huronense var. terrae-novae

 
 
 

Lake Huron tansy is an erect forb, 1-8dm tall, with 1-3 main stems, usually with 1-15 daisy-type heads composed of many separate, small flowers, per stem. The disk florets are yellow, tightly arranged in the center, and 10-18mm. The ray flowers surrounding the disks are 2.5-4mm long. Fruits are 5-angled cypselae, 2-3.5mm long, and speckled with glands. Leaves are hairy, inconspicuously glandular-dotted, deeply twice or more divided, each segment has a short, dull point. Basal rosette leaves are persistent, 23-36cm long and 3-9cm wide, stem leaves successively smaller.

Strongly rhizomatous. Blooming occurs late-June through early-August, fruiting late-July through late-August.

Perennial. The optimal identification period for this species is late-June through early-September.

Associated species include Cirsium pitcheri, Ammophila breviligulata, Solidago simplex, Elymus lanceolatus ssp psammophilus, Calamovilfa longifolia var magna, Prunus pumila, and Salix species.

Lake Huron tansy is found along the Lake Michigan shore, including sandy beaches, dunes, and limestone pavements.

Avoid known individual plant locations and conduct operations elsewhere when they are least likely to cause damage. Ideally, this would involve frozen, snow-covered ground. However, in areas of the state where frozen conditions are unreliable, very dry soils late in the growing season might be the best available alternative. Consult with a biologist, if needed.

Avoid broadcast spraying of herbicides and use care with spot spraying.

Avoid disturbance to shorelines and the forest-beach interface.

Avoid any activities that destabilize the dune, including the use of off-road vehicles, removal of native vegetation, and pedestrian recreational overuse.

Minimize disturbance to hydrology, including soil disturbance from rutting.

Species of Greatest Conservation Need (SGCN) are associated with habitats (or natural communities) and places on the landscape. Understanding relationships among SGCN, natural communities and ecological landscapes help us make decisions about issues affecting SGCN and their habitat and how to respond. Download the Wildlife Action Plan association score spreadsheet to explore rare species, natural communities and ecological landscape associations

Conservation actions respond to issues or threats, which adversely affect species of greatest conservation need (SGCN) or their habitats. Besides actions such as restoring wetlands or planting resilient tree species in northern communities, research, surveys and monitoring are also among conservation actions described in the Wisconsin Wildlife Action Plan because lack of information can threaten our ability to successfully preserve and care for natural resources.