Rumex occidentalis
Western dock

Key Characteristics

Stout forb of riverbanks in the Upper Peninsula; leaves oblong, abruptly cordate at the base; inflorescence a terminal raceme of tiny red to green flowers; inner tepals 4-7 cm wide, without an enlarged protuberance on the midrib.

Status and Rank

  • State Status: E
  • State Rank: S1
  • Global Rank: G5T5

Occurrences

County NameNumber of OccurrencesYear Last Observed
Marquette21990
Distribution map for Rumex occidentalis

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 from two localities along the banks of the Escanaba River, with no other data provided. Elsewhere, this northeastern and western North American species is known generally from wet soil.

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

Minimal collection data provide no information on associates.

Management

A status survey is necessary to compile information that will help identify the habitat requirements of this species. Protection of hydrology is likely to be critical.

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 Jul 20, 2017]

References

Survey References

Technical References

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