PROTECTING WISCONSIN'S BIODIVERSITY

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

Glade Mallow (Napaea dioica)

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Photo by Thomas Meyer

 

Counties with Mapped NHI Occurrences

Glade Mallow (Napaea dioica), a Wisconsin Special Concern plant, is found in alluvial meadows, ditches, and forest margins near large rivers. Blooming occurs early-June through early-August, fruiting early-August through late-September. The optimal identification period for this species is early-July through August.

 
 
 

Glade mallow is an erect forb with many flowers in a large, terminal panicle. Its calyx is 5-8 mm, sparsely hairy or smooth, the lobes are shorter than the tube. Petals are white, those of staminate flowers are 5-9mm, those of pistillate flowers much smaller. Mature carpels are 5mm and ribbed on the back. Its leaves are round, 1-3dm, deeply 5-9-lobed or parted, the lobes are coarsely toothed or incised.

Blooming occurs early-June through early-August, fruiting early-August through late-September.

Perennial. The optimal identification period for this species is early-July through late-August.

Associated species include Heracleum lanatum, Angelica atropurpurea, Silphium perfoliatum, Rudbeckia laciniata, Potentilla arguta, Cypripedium candidum, Eryngium yuccifolium, and Eupatorium perfoliatum.

Glade mallow is found in alluvial meadows, ditches, and forest margins near large rivers.

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.

Prescribed burns and/or brushing may be beneficial, dependent on local site conditions and burn frequency. Rotational burns with annual unburned refugia may be preferred.

Minimize disturbance to hydrology, including soil disturbance from rutting.

Maintain and restore open habitat through selective clearing and brushing.

Survey for and control invasive plants prior to conducting timber operations, as these can be spread by vehicles and often respond vigorously to increased light. See forestry BMPs for invasive species.

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.