Lactuca floridana
Woodland lettuce

Key Characteristics

Very tall forb (2 m) of open woods; leaves mostly with petioles, ranging from elliptic with serrated margins to deeply dissected; flowers blue in an open, widely spreading inflorescence.

Status and Rank

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

Occurrences

County NameNumber of OccurrencesYear Last Observed
Lenawee11988
Monroe11994
Wayne32011
Distribution map for Lactuca floridana

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

Collected in lakeplain areas and sandy oak woods in southeast Lower Michigan.

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

In one site near Lake Erie, this species occurred on fill soil, associated with Eastern cottonwood, boxelder, white mulberry, dame's rocket, white avens, late figwort, Virginia creeper, and bur cucumber.

Management

The primary need at the present is a status survey. If found, it would likely benefit from maintenance of natural disturbance associated with dry woods and savannas such as prescribed fire.

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 http://mnfi.anr.msu.edu/explorer [Accessed May 27, 2017]

References

Survey References

Technical References

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