Chelone obliqua
Purple turtlehead
Image of Chelone obliqua

Photo by Susan R. Crispin 

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Key Characteristics

Perennial forb of southern floodplain forests; leaves lanceolate and serrated; flower pinkish-purple.

Status and Rank

  • State Status: E
  • State Rank: S1
  • Global Rank: G4

Occurrences

County NameNumber of OccurrencesYear Last Observed
Washtenaw32004
Distribution map for Chelone obliqua

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

Known only from two small sites along the Huron River where is it found in floodplain thickets.

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.

Feel free to send questions and comments to Brad Slaughter at slaugh14@msu.edu.

Associated Plants

Silver maple, green ash, red maple, black walnut, hackberry, black maple, Ohio buckeye, box elder, black ash, black willow, cottonwood, swamp white oak, sycamore, spice bush, redbud, paw paw, Kentucky coffee tree, red mulberry, Virginia blue-bells, common trillium, red trillium, stinging nettle, poison ivy, moneywort, Canada moonseed, wild ginger, skunk cabbage, honewort, kidney-leaved buttercup, false mermaid, and rough bedstraw.

Management

Conserve hydrology of river system and corresponding cyclical floodplain regime. Maintain healthy intact, mature floodplain forests, and minimize forest fragmentation. Remove invasive species from occupied sites and adjacent areas.

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 Apr 30, 2017]

More Information

See MNFI Species Abstract

References

Survey References

Technical References

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