PROTECTING WISCONSIN'S BIODIVERSITY

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

Clustered Broomrape (Orobanche fasciculata)

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Photo by R.C. Moran

 

Counties with Mapped NHI Occurrences

Clustered Broomrape (Orobanche fasciculata), a Wisconsin Threatened plant, is found in dry prairies and dunes (both near Lake Michigan and inland). Blooming occurs throughout June, fruiting throughout July. The optimal identification period for this species is throughout June.

Anoplanthus fasciculatus, Orobanche fasciculata var. franciscana, Thalesia fasciculata

 
 
 

Clustered broomrape is an erect forb, 5-15cm tall, with loose, flat-topped corymbs that surpass the stem, bractlets are absent, corolla are 1.5-3cm, calyx lobes are about equal to the tube. Leaves are reduced to scales, ovate, hairy, all or at least the upper ones with an abrupt, sharp point.

Its 4-10 pedicels, slightly, if at all, longer than the stem distinguish it from similar species.

Blooming occurs throughout June, fruiting throughout July.

Annual. The optimal identification period for this species is throughout June.

Root-parasite herb. Associated species include Ammophila breviligulata, Artemisia campestris, and Cirsium pitcheri.

Clustered broomrape prefers dry, sandy soils and is found in dry prairies and dunes (both near Lake Michigan and inland).

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

Because this plant is an annual, work may safely be conducted before the plants emerge or after they have developed mature seeds.

Avoid disturbance to shorelines and the forest-beach interface.

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.

Maintain and restore open habitat through selective clearing and brushing.

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.