Androsace occidentalis
Image of Androsace occidentalis

Photo by Emmet J. Judziewicz 

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Key Characteristics

Inconspicuous annual forb (5-10 cm); leaves forming a small basal rosette; flowers tiny, white, in umbels on a short stalk.

Status and Rank

  • State Status: E
  • State Rank: SX
  • Global Rank: G5


County NameNumber of OccurrencesYear Last Observed
Distribution map for Androsace occidentalis

Updated 5/15/2018. 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.


Known only from a single collection near Niles in southwestern Lower Michigan, where it was likely collected within an oak barrens or dry prairie.

Natural Community Types


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

Few data were noted from the one known site, only described as an old field. It is likely associated with oak savanna and/or dry prairie species.


Little oak savanna habitat remains in southwest Michigan. This species may possibly persist in small remnant habitats, where it could be easily overlooked. It may also remain in habitats similar to those known in Ohio. Management to maintain and restore oak barrens such as prescribed burning and controlling woody brush would be beneficial.

General Survey Guidelines

Random meander search covers areas that appear likely to have rare taxa, based on habitat and the judgment of the investigator. This is an early blooming species best sought in April.

Survey Methods

Page Citation

Michigan Natural Features Inventory. 2007. Rare Species Explorer (Web Application). Available online at [Accessed Aug 18, 2018]


Survey References

Technical References

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