Erigeron hyssopifolius
Hyssop-leaved fleabane
Image of Erigeron hyssopifolius

Photo by Janet K. Marr 

Expand
More Images

Key Characteristics

Small forb (30 cm) of northern fens and calcareous shores; stem with numerous narrow, tapering leaves; flowers in a single head with numerous white rays and a yellow disk.

Status and Rank

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

Occurrences

County NameNumber of OccurrencesYear Last Observed
Keweenaw12014
Mackinac32016
Distribution map for Erigeron hyssopifolius

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

Very local in calcium-rich fens and marly openings within northern white-cedar swamps in the Mackinac Straits. One recently documented population occurs on volcanic bedrock along Lake Superior in Keweenaw County.

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.

Associated Plants

Butterwort, bulrush sedge, northern white cedar, Richardson's sedge, spikerush, linear-leaved sundew, black spruce, tamarack, small cranberry, shrubby cinquefoil, swamp laurel, leatherleaf, and false asphodel.

Management

Primarily requires protection of northern fen habitat, including perpetuation of hydrological and natural disturbance regime; needs open, wet, marly habitat. Protect from excessive foot traffic and ORVs. May be sensitive to cutting and harvesting of northern white cedar.

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 Jun 26, 2017]

References

Survey References

Technical References

Facebook link