PROTECTING WISCONSIN'S BIODIVERSITY

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

Woodland Cudweed (Omalotheca sylvatica)

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Photo by Steve Garske

 

Counties with Mapped NHI Occurrences

Woodland Cudweed (Omalotheca sylvatica), a Wisconsin Special Concern plant, is found in openings in hardwoods and mixed woods and along old trails and shady, little used roads. Elsewhere in its range, this species is known from clearings, rocky slopes, and borders of woods and fields. Blooming occurs late-July through late-August, fruiting early-August through early-October. The optimal identification period for this species is early-August through early-October.

Gnaphalium sylvaticum

 
 
 

Woodland cudweed is an erect forb, 10-60cm tall, has a narrow, inflorescence, somewhat leafy-bracteate, with 10 or more heads. Pappus bristles are united into a ring at base. Involucre scarcely woolly, or woolly only at the base, 5 to 7 mm, its bract rounded or obtuse, light or greenish-stramineous toward the base, some or all with a conspicuous dark brown, commonly inverted V-shaped spot above the middle. Achenes are sparsely strigose. Leaves are alternate, linear or narrowly oblanceolate, numerous and overlapping, mostly glabrous above. Larger basal and lower cauline leaves 3-8mm wide. Leaves at the base of the inflorescence are 2-3mm wide.

Rhizomatous. Blooming occurs late-July through late-August, fruiting early-August through early-October.

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

Associated species include Abies balsamea, Clintonia borealis, Lycopodium digitatum, Rubus hispidus, R strigosus, Aster lateriflorus, Ranunculus acris, Trifolium repens, and Hieracium aurantiacum.

Woodland cudweed is found in openings in hardwoods and mixed woods and along old trails and shady, little used roads. Elsewhere in its range, this species is known from clearings, rocky slopes, and borders of woods and fields.

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

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

Although maintaining high overall forest canopy is important, silvicultural techniques that open small gaps in the canopy may be beneficial to this species. Seedlings and saplings of some species in openings may need to be protected from deer browse.

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.