Photo by Ryan P. O'Connor
Tall aquatic grass (2-3 m) of emergent marshes, lakeshores, and slowly moving streams; leaves (submersed, floating or aerial) 1-4.5 cm wide; inflorescences terminal with female spikelets above and male spikelets below; pistillate lemmas thin and flexible, with a few stiff hairs between the nerves. Several other varieties also occur.
Status and Rank
- State Status: T
- State Rank: S2S3
- Global Rank: G5
|County Name||Number of Occurrences||Year Last Observed|
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.
Natural Community Types
- Emergent marsh
- Great lakes marsh
- Inland lake, littoral, benthic
- Mainstem stream (3rd-4th order), pool
- Mainstem stream (3rd-4th order), run
- River (5th-6th order), pool
- River (5th-6th order), run
- Southern wet meadow
- Prairie fen
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.
The species benefits from habitat protection and the maintenance of wetland hydrology, including the natural cycle of water fluctuations. Agricultural run-off has negative impacts, as does the spread of non-native species like narrow-leaf cattail, Phragmites, and purple loosestrife.
More InformationSee MNFI Species Abstract
- Elzinga, C.L., D.W. Salzer, and J.W. Willoughby. 1998. Measuring and Monitoring Plant Populations. The Nature Conservancy and Bureau of Land Management, Denver. BLM Technical Reference 1730-1. 477pp.
- Goff, G.F., G.A. Dawson, and J.J. Rochow. 1982. Site examination for Threatened and Endangered plant species. Environmental Management 6(4): 307-316
- Nelson, J.R. 1984. Rare Plant Field Survey Guidelines. In: J.P. Smith and R. York. Inventory of rare and endangered vascular plants of California. 3rd Ed. California Native Plant Society, Berkeley. 174pp.
- Nelson, J.R. 1986. Rare Plant Surveys: Techniques For Impact Assessment. Natural Areas Journal 5(3):18-30.
- Nelson, J.R. 1987. Rare Plant Surveys: Techniques for Impact Assessment. In: Conservation and management of rare and endangered plants. Ed. T.S. Elias. California Native Plant Society, Sacramento. 8pp.
- Braun, E. L. 1967. The Monocotyledoneae of Ohio. Cat-tails to Orchids. Ohio State University Press, Columbus. 464pp.
- Deam, C. C. 1940. Flora of Indiana. Department of Conservation, Indianapolis. 1236pp.
- Dore, W.G. and J. McNeill. 1980. Grasses of Ontario. Agriculture Canada Research Monographs 26: 566pp.
- Gleason, H. A., and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. Second edition. The New York Botanical Garden, Bronx. 910pp.
- Gray, A. 1950. Gray's Manual of Botany; eighth ed. Van Nostrand Reinghold, New York. 1632pp.
- Hitchcock, A. S. 1951. Manual of the Grasses of the United States. Second ed. Revised by A. Chase. U.S. Department of Agriculture Miscellaneous Publications 200. 1051pp.
- Holmgren, N.H. 1998. Illustrated Companion to Gleason and Cronquist's Manual. Illustrations of the vascular plants of Northeastern United States and adjacent Canada. New York Botanical Garden, Bronx. 937pp.
- Mohlenbrock, R.H. 1986. Guide to the Vascular Flora of Illinois. Southern Illinois University Press, Carbondale. 507pp.
- Swink, F. and G. Wilhelm. 1994. Plants of the Chicago Region, 4th ed. Indiana Academy of Science, Indianapolis. 921pp.
- Voss, E. G. 1972. Michigan Flora. Part I. Gymnosperms and Monocots. Bulletin of the Cranbrook Institute of Science and University of Michigan Herbarium. 488pp.