Collinsia parviflora
Small blue-eyed Mary
Image of Collinsia parviflora

Photo by Christopher Heckel 

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Key Characteristics

Small annual forb (10-40 cm) of rocky outcrops in the Upper Peninsula; leaves narrow (2-7 mm) and entire, opposite or whorled; flowers white to blue, small (5 mm).

Status and Rank

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

Occurrences

County NameNumber of OccurrencesYear Last Observed
Keweenaw351999
Marquette32005
Ontonagon112009
Schoolcraft11958
Distribution map for Collinsia parviflora

Updated 7/21/2017. 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 on bedrock outcrops in western Upper Peninsula, where it occurs on open, rocky ridge tops and cliff summits on thin, bare soil formed by eroding bedrock, and sometimes around the edges of low shrubs.

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

Bearberry, serviceberry, rock spikemoss, hairgrass, common juniper, Douglas's knotweed, early saxifrage, pussy-toes, common polypody, smooth cliff brake, and bush honeysuckle.

Management

Primarily needs open outcrop habitats and maintenance of natural disturbance regime. It may be vulnerable to excessive foot traffic, which has apparently impacted this plant at some of its localities.

General Survey Guidelines

Random meander search covers areas that appear likely to have rare taxa, based on habitat and the judgement 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 Aug 23, 2017]

References

Survey References

Technical References

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