Agoseris glauca
Prairie or pale agoseris
Image of Agoseris glauca

Photo by Susan R. Crispin 

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Key Characteristics

Clumped perennial (20-70 cm) of pine barrens; leaves slender with pale midvein, toothless, up to 30 cm long; flowers yellow, one head per tall leafless stalk.

Status and Rank

  • State Status: T
  • State Rank: S2
  • Global Rank: G5

Occurrences

County NameNumber of OccurrencesYear Last Observed
Crawford12004
Montmorency41995
Oscoda82013
Otsego32002
Distribution map for Agoseris glauca

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

Occurs in pine barrens, jack pine savanna, jack pine-red oak savanna, and open shrub-grassland in central northern Lower Michigan.

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

Rough fescue, big bluestem, little bluestem, blazing star, harebell, Hill's thistle, prairie willow, poverty grass, hair grass, yellow-pimpernel, sand cherry, sweet-fern, and blueberry.

Management

Prescribed burns are beneficial for this early successional species. Maintenance of openings via other means (mechanical tree and shrub removal) would likely also help perpetuate colonies. Furrowing and planting over areas with dense jack pine is not recommended, since severe soil disturbance and a dense canopy are detrimental to this species.

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 May 27, 2017]

More Information

See MNFI Species Abstract

References

Survey References

Technical References

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