Sagittaria montevidensis
Arrowhead
Image of Sagittaria montevidensis

Photo by Dennis A. Albert 

Key Characteristics

Stout aquatic-emergent of marshes; leaves broadly arrow-shaped, much broader than long; flowers white, with sepals closely cupped around the flower and fruit.

Status and Rank

  • State Status: T
  • State Rank: S1S2
  • Global Rank: G4G5

Occurrences

County NameNumber of OccurrencesYear Last Observed
Monroe92001
Wayne31988
Distribution map for Sagittaria montevidensis

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

Broad-leaved arrowhead is found in wet to shallowly inundated mud flats and banks, lagoons, and estuaries.

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

Common arrowhead, wild celery, pickerel week, softstem bulrush, hibiscus, pondweed, and nodding smartweed.

Management

To protect this species, maintain hydrological cycles, including periodic natural drawdowns necessary for replenishment of seed bank. Control of invasive species like purple loosestrife and Phragmites may also be necessary at some locations.

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 Aug 23, 2017]

References

Survey References

Technical References

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