Myriophyllum farwellii
Farwell's water milfoil
Image of Myriophyllum farwellii

Photo by Robert W. Freckmann 

Key Characteristics

Slender aquatic forb of shallow lakes and beaver ponds; stems submerged with delicate branches and foliage, the leaves finely dissected and arranged both alternately and whorled; flowers and fruits borne in axils of submerged leaves.

Status and Rank

  • State Status: T
  • State Rank: S2
  • Global Rank: G5


County NameNumber of OccurrencesYear Last Observed
Distribution map for Myriophyllum farwellii

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.


Farwell's water-milfoil is found in shallow water of lakes, ponds, and marshes with mucky or peaty (occasionally sandy) bottoms in the Upper Peninsula.

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

Water plantain, water lobelia, narrow-leaved bur-reed, quillwort, spatterdock, and alga pondweed.


This species needs protection of its aquatic habitat, as well as adjoining wetlands and uplands.

General Survey Guidelines

Random meander search covers areas that appear likely to have rare taxa, based on habitat and the judgment of the investigator.

Survey Methods

Page Citation

Michigan Natural Features Inventory. 2007. Rare Species Explorer (Web Application). Available online at [Accessed Jul 20, 2018]


Survey References

Technical References

Facebook link