Vaccinium cespitosum
Dwarf bilberry
Image of Vaccinium cespitosum

Photo by Susan R. Crispin 

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Key Characteristics

Very low prostrate shrub of open habitat in the Upper Peninsula; forming circular clones in dense mats up to several meters in diameter; small, roundish deciduous leaves have bristle-tipped teeth; single, pinkish, bell-shaped flowers are borne in the leaf axils.

Status and Rank

  • State Status: T - Threatened (legally protected)
  • State Rank: S1S2 - Rank is uncertain, ranging from critically imperiled to imperiled
  • Global Rank: G5 - Secure

Occurrences

County NameNumber of OccurrencesYear Last Observed
Alger42000
Keweenaw21986
Marquette32005
Ontonagon32007
Schoolcraft21987
Distribution map for Vaccinium cespitosum

Updated 10/1/2014. 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

Dwarf bilberry occurs in open or semi-open habitats in the Upper Peninsula on dry, sandy soil. It is also found in seasonally wet, meadow-like areas intermixed with dry northern forest and dry sand prairie.

Natural Community Types

Associated Plants

Big bluestem, little bluestem, Pennsylvania sedge, tower mustard, whorled milkweed, Ohio horse mint, old field balsam, hairy hawkweed, dwarf dandelion, rough blazing star, cylindrical blazing star, blue toadflax, wild lupine, horsemint, racemed milkwort, panic grass, Venus looking glass, grasses, and sedges.

Management

This species is the larval host plant for the state threatened northern blue butterfly. Disturbances to the sod should be avoided. Fire may play an important role in maintaining habitat, but never burn an entire site all at once. Active management to limit canopy closure may be needed if fire is not an option. The habitat of this species has been severely degraded and diminished.

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 Dec 22, 2014]

More Information

See MNFI Species Abstract

References

Survey References

Technical References