PROTECTING WISCONSIN'S BIODIVERSITY

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

Northwestern Sticky Aster (Canadanthus modestus)

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Photo by Scott Namestnik

 

Counties with Mapped NHI Occurrences

Northwestern Sticky Aster (Canadanthus modestus), a Wisconsin Special Concern plant, is found in a single wetland in Douglas County but may be found elsewhere in the boreal region in moist wooded or open areas, including bogs, alder thickets, and swamps. Blooming occurs from late-summer to early-fall. The optimal identification period for this species is late-August to early-September.

Aster major, Aster modestus, Aster unalaschensis var. major, Weberaster modestus

 
 
 

Northwestern sticky aster is an erect forb, usually with a solitary stem, 3-10dm tall, and few to many flower heads with purple ray flowers 7-15mm long, yellow disk flowers, 5-7mm long, and green involucres 7-11mm long. Its fruit are hairy achenes with prominent rib-like veins. Leaves are alternate, lanceolate, sessile (stalkless), and sparsely toothed, becoming smaller toward top of stem, which has gland-tipped hairs toward the top.

It is distinguished from A novae-angliae by its stalkless (vs clasping) leaves, solitary stems, and green involucres.

Blooming occurs from late-summer to early-fall, fruiting in early-fall.

Perennial. The optimal identification period for this species is late-August to early-September.

Associated species include Populus tremuloides, Alnus rugosa, Cornus stolonifera, Ribes hirtellum, Salix petiolaris, S pyrifolia, Rubus idaeus ssp strigosus, R pubescens, Athyrium filix-femina, Calamagrostis canadensis, Epilobium coloratum, Impatiens capensis, Polygonum sagittatum, Equisetum sylvaticum, Dryopteris cristata, Galium asperellum, Mentha arvensis v villosa, and Stellaria longifolia.

Northwestern sticky aster has been found in a single wetland in northern Wisconsin, but may occur elsewhere in moist wooded or open areas, including bogs, alder thickets, and swamps in the boreal region.

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.