Calamagrostis lacustris
Northern reedgrass

Key Characteristics

Tall perennial grass of rocky openings and shores; leaves narrow, flat, scabrous; inflorescence tightly contracted, awns of lemma twisted at base.

Status and Rank

  • State Status: SC
  • State Rank: S1
  • Global Rank: G3Q

Occurrences

County NameNumber of OccurrencesYear Last Observed
Houghton21953
Iron12004
Keweenaw42005
Marquette11900
Distribution map for Calamagrostis lacustris

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

Few habitat data are available. The few specimens that exist were noted as being collected from mossy rock crevices, rocky openings, the sandy shore of an inland lake, and a rich shrub-dominated fen.

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

No data are available concerning associates in Michigan.

Management

Little is known about this species; primary conservation need at present is to validate former localities and obtain better data.

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 Nov 22, 2017]

References

Survey References

Technical References

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