Carex lupuliformis
False hop sedge
Image of Carex lupuliformis

Photo by Bradford S. Slaughter 


Key Characteristics

Loosely clumped (or singular) robust sedge of wet forests, similar to C. lupulina; leaves 6-13 mm wide; spikes large and erect with inflated perigynia; achenes rhombic with very prominent knee-like knobs.

Status and Rank

  • State Status: T
  • State Rank: S2
  • Global Rank: G4


County NameNumber of OccurrencesYear Last Observed
St. Joseph11915
Van Buren11915
Distribution map for Carex lupuliformis

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.


Floodplain forests and swamps in southern Lower Michigan, usually in lower bottoms and at the margins of vernal pools.

Specific Habitat Needs

needed in Wet-mesic flatwoods Pool needed in Mesic southern forest

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

Buttonbush, silver maple, red ash, spicebush, poison ivy, and southern blue-flag.


Requires maintenance of hydrological regime, and is likely sensitive to overstory removal and other types of artificial disturbance. May be susceptible to direct and indirect impacts from excessive timber harvesting.

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 Sep 23, 2018]

More Information

See MNFI Species Abstract


Survey References

Technical References

Facebook link