PROTECTING WISCONSIN'S BIODIVERSITY

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

Northern Wild-raisin (Viburnum cassinoides)

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Photo by Andy Clark

 

Counties with Mapped NHI Occurrences

Northern Wild-raisin (Viburnum cassinoides), a Wisconsin Special Concern plant, is found in open or brushy wetlands or, less commonly, on wet forest margins, mostly near Green Bay, where the water table fluctuates in concert with seasonal to decadal changes in Lake Michigan water levels. Blooming occurs through July, fruiting late-August through early-September. The optimal identification period for this species is early-July through early-September.

Viburnum nitidum, Viburnum nudum var. cassinoides

 
 
 

Northern wild-raisin is a shrub up to 4m tall, with an inflorescence that is at least partly terminal and winter buds that are yellow-brown or golden. Its fruits are blue-black drupes with elliptic stones and sweet pulp, 6-12mm. Its leaves are opposite, dull and firm, indistinctly veiny, ovate to lanceolate, rounded to tapering at base, and crenulate.

It can be distinguished from other un-lobed Viburnum species by the combination of its lacking star-shaped hairs on underside of leaf and having leaf veins that branch and reform before reaching the margins.

Blooming occurs throughout July, fruiting late-August through early-September.

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

Associated species include Fraxinus pennsylvanica, Acer saccharinum, Alnus rugosa, Cornus stolonifera, Calamagrostis canadensis, Carex stricta, Salix species, Rubus pubescens, and Impatiens capensis.

Northern wild-raisin prefers wet-mesic to mesic, neutral to basic soils and is found in open or brushy wetlands or, less commonly, on wet forest margins, mostly near Green Bay, where the water table fluctuates in concert with seasonal to decadal changes in Lake Michigan water levels.

Avoid locating landings, staging areas, or access routes on or near known populations.

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

This species overwinters above ground, meaning that seasonal restrictions like conducting the a project on frozen ground will not result in avoidance. Therefore, known individual plant locations should be avoided year-round. Consult with a biologist, if needed.

Follow BMPs, especially around streams and use care near ravines, steep slopes, cliffs, rock outcrops, etc.

Minimize disturbance to hydrology, including soil disturbance from rutting.

Avoid rapid and dramatic reductions in canopy cover and, basal area, in wet areas to reduce risk of swamping.

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.