Chasmanthium latifolium
Wild oats
Image of Chasmanthium latifolium

Photo by Susan R. Crispin 

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Key Characteristics

Tall perennial grass (1-1.5 m) of river floodplains; leaves 1-2 cm wide; inflorescence nodding with large, conspicuously flattened spikelets.

Status and Rank

  • State Status: E
  • State Rank: S1
  • Global Rank: G5


County NameNumber of OccurrencesYear Last Observed
Distribution map for Chasmanthium latifolium

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.


The single Michigan site is a forested floodplain in Berrien County.

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

The little data available shows this species to be associated with aster, poison ivy, stinging nettle, wood nettle, silver maple, and red ash.


Michigan's only known site is from a floodplain forest, and a status survey is needed. It likely requires maintenance of natural disturbance regime and an intact forest canopy.

General Survey Guidelines

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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