Euphorbia commutata
Tinted spurge
Image of Euphorbia commutata

Photo by Brad Slaughter 

Key Characteristics

Small forb of open woods and stream borders; upright stems arising from a prostrate base; leaves obovate, alternate, sap milky; leafy bracts below flower opposite and joined at base; flowers with tiny crescent-shaped glands; seeds with small pits on surface.

Status and Rank

  • State Status: T
  • State Rank: S1
  • Global Rank: G5

Occurrences

County NameNumber of OccurrencesYear Last Observed
Allegan11931
Berrien41997
Kent31901
Muskegon11901
Ottawa11901
Wayne11889
Distribution map for Euphorbia commutata

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

Known from sandy hillsides and mesic forests bordering rivers and in sandy soil of open woods.

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

Red cedar, ground juniper, dogwood, little bluestem, basswood, sassafras, smooth horsetail, rattlesnake fern, woolly blue violet, wild licorice, common fleabane, jack-in-the-pulpit, red elderberry, sweet cicely, ironwood, tulip tree, and white ash.

Management

This species, which has been collected infrequently in Michigan, is poorly understood. It has been observed only twice within the last 20 years or so, with one occurrence observed within a mesic forest. No specific management is known for this habitat. Status surveys are necessary to better document and understand the biology and ecology of this species in Michigan.

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 23, 2017]

More Information

See MNFI Species Abstract

References

Survey References

Technical References

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