Eupatorium sessilifolium
Upland boneset
Image of Eupatorium sessilifolium

Photo by Ryan P. O'Connor 

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Key Characteristics

Tall forb (1-1.5 m) of open dry woods; leaves opposite, sessile, and heart-shaped at the base; flowers white, borne in heads in open flat-topped clusters.

Status and Rank

  • State Status: T
  • State Rank: S1
  • Global Rank: G5

Occurrences

County NameNumber of OccurrencesYear Last Observed
Barry12012
Calhoun12008
Cass21985
Jackson21964
Kalamazoo22008
Newaygo11998
Washtenaw32001
Distribution map for Eupatorium sessilifolium

Updated 1/31/2017. Information is summarized from MNFI's database of rare species and community occurrences. Data may not reflect true distribution since much of the state has not been thoroughly surveyed.

Habitat

Found in remnant oak forests and oak savannas in southern Lower Michigan, often on wooded slopes and in steep topography.

Natural Community Types

Methodology

For each species, lists of natural communities were derived from review of the nearly 6,500 element occurrences in the MNFI database, in addition to herbarium label data for some taxa. In most cases, at least one specimen record exists for each listed natural community. For certain taxa, especially poorly collected or extirpated species of prairie and savanna habitats, natural community lists were derived from inferences from collection sites and habitat preferences in immediately adjacent states (particularly Indiana and Illinois). Natural communities are not listed for those species documented only from altered or ruderal habitats in Michigan, especially for taxa that occur in a variety of habitats outside of the state.

Natural communities are not listed in order of frequency of occurrence, but are rather derived from the full set of natural communities, organized by Ecological Group. In many cases, the general habitat descriptions should provide greater clarity and direction to the surveyor. In future versions of the Rare Species Explorer, we hope to incorporate natural community fidelity ranks for each taxon.

Feel free to send questions and comments to Brad Slaughter at slaugh14@msu.edu.

Associated Plants

Sassafras, black oak, white oak, red oak, pignut hickory, black cherry, chokecherry, witch hazel, redbud, fragrant sumac, green brier, Virginia creeper, bluestem goldenrod, Virginia snakeroot, wild licorice, jumpseed, enchanter's nightshade, lopseed, and horse-gentian.

Management

May require management that maintains and perpetuates oak savanna habitat, particularly prescribed fire. This species occurs within relatively closed-canopy forests but likely occurred within a savanna/barrens landscape prior to European settlement.

General Survey Guidelines

Random meander search covers areas that appear likely to have rare taxa, based on habitat and the judgment of the investigator.

Survey Methods

Page Citation

Michigan Natural Features Inventory. 2007. Rare Species Explorer (Web Application). Available online at http://mnfi.anr.msu.edu/explorer [Accessed Apr 27, 2017]

References

Survey References

Technical References

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