Glyceria melicaria
Slender manna grass

Key Characteristics

Large perennial grass of wet rich woods; resembling G. grandis, but with a very narrow, erect panicle with tightly ascending branches and smaller spikelets (4 mm instead of 5-6 mm long).

Status and Rank

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


County NameNumber of OccurrencesYear Last Observed
Distribution map for Glyceria melicaria

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.


Discovered in Michigan in 2002, this species is currently known from a lowland swamp, in both open and shaded conditions. Additional surveys are neeed for this newly listed species, which is disjunct from its main range to the east.

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 that exist describe the species as being associated with yellow birch, mountain maple, spicebush, and touch-me-not.


The primary need for this species at present is a status survey to determine if additional populations can be discovered. If found, protection of hydrology is likely to be critical. Control of invasive species is also likely important.

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 [Accessed Aug 18, 2018]


Survey References

Technical References

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