Photo by Lucinda Thomson
Tall bulrush (1.5 m) of wetland margins; culms sharply triangular in cross-section, similar to three-square (S. pungens); spikelets appear lateral, compact; scales of spikelet broadly triangular with rounded (not cleft) tip.
Status and Rank
- State Status: SC
- 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.
Torrey's bulrush is found in seasonally inundated wetlands, including intermittent wetlands and lake margins.
Specific Habitat Needs
Pool needed in Bog
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.
Common three-square, lance-leaved violet, arrowhead, one-flowered muhly grass, hardstem and softstem bulrush, strict sedge, and cat tail.
The primary conservation need for this species is the maintenance of hydrology and natural disturbance regime. It may also require prescribed fire over the long-term for perpetuation.
General Survey Guidelines
Random meander search covers areas that appear likely to have rare taxa, based on habitat and the judgement of the investigator.
- Meander search
Survey Period: From first week of July to fourth week of September
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