Valerianella umbilicata
Corn salad

Key Characteristics

Small branching forb (60 cm) of forested floodplains; leaves alternate and rounded, becoming narrower up the hairy stem; small, white, tubular flowers borne in hemispherical clusters with two narrow, lance-shaped bracts at the base; tiny (1.5-2 mm) fruiting pods are triangular in cross-section.

Status and Rank

  • State Status: T
  • State Rank: S2
  • Global Rank: G4G5

Occurrences

County NameNumber of OccurrencesYear Last Observed
Monroe41990
Distribution map for Valerianella umbilicata

Updated 1/31/2017. 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

This species is found in floodplain forests in southeast Michigan. It is presently only known in Monroe County.

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.

Feel free to send questions and comments to Brad Slaughter at slaugh14@msu.edu.

Associated Plants

Few collection data are known from Michigan. In the Chicago region, this species is associated with wild ginger, sedge (Carex blanda), hackberry, black walnut, wild licorice, Virginia creeper, black cherry, and poison ivy.

Management

This species requires protection from human disturbances such as development, deforestation, and alterations in hydrological regimes. There is little detailed habitat information for this species, thus status surveys are recommended in order to better understand ecological requirements.

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 Mar 24, 2017]

References

Survey References

Technical References