PROTECTING WISCONSIN'S BIODIVERSITY

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

Veined Meadowrue (Thalictrum venulosum)

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Photo by USDA-NRCS

 

Counties with Mapped NHI Occurrences

Veined Meadowrue (Thalictrum venulosum), a Wisconsin Special Concern plant, is found in pine forests on Lake Superior barrier spits. In Michigan, it occurs on wet calcareous Great Lakes shores and thickets along riverbanks. It is also known from prairies, riparian woods, and coniferous, deciduous, and mixed forests, cobble shorelines, wet meadows, and calcareous rock outcrops along or near shorelines of large lakes, rocky or gravelly soil, often along shores, and alluvial or rocky river shores, and talus. Blooming occurs late-June through early-July, fruiting throughout July. The optimal identification period for this species is late-June through early-July.

 
 
 

Veined meadowrue is an erect forb with smooth stems arising 3-10dm from the upturned end of its rhizome. It has a slender panicle with ascending branches. Flowers are mostly unisexual and drooping. Sepals are pinkish to greenish white, filaments colored yellow to red, and are very exserted. Its fruits are small and dry with a single locule and a single seed attached to the ovary wall at a single point, 4-6mm, the lower margin is more convex than the upper. Leaved are usually at least sparsely glandular beneath, those below the inflorescence are petioled.

Rhizomatous. Blooming occurs late-June through early-July, fruiting throughout July.

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

Associated species include Pinus resinosa, P strobus, Prunus pensylvanica, Toxicodendron radicans, Populus balsamifera, and Rubus strigosus.

In Wisconsin, veined meadowrue is found in pine forests on Lake Superior barrier spits. In Michigan, it occurs on wet calcareous Great Lakes shores and thickets along riverbanks. It is also known from prairies, riparian woods, and coniferous, deciduous, and mixed forests, cobble shorelines, wet meadows, and calcareous rock outcrops along or near shorelines of large lakes, rocky or gravelly soil, often along shores, and alluvial or rocky river shores, and talus.

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.

Minimize disturbance to hydrology, including soil disturbance from rutting.

Maintain low canopy cover areas for savanna and barrens plant 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.