Plants and Animals
Cypripedium arietinum Ram's head lady's-slipper
Very small orchid (10-30 cm) of upland and lowland conifer-dominated systems; leaves narrowly elliptic; flowers small with a deeply pouched lower lip marked with dark red, netted venation.
Status and Rank
US Status: No Status/Not Listed
State Status: SC - Special Concern (rare or uncertain; not legally protected)
Global Rank: G3 - Vulnerable
State Rank: S3 - Vulnerable
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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.
Found primarily on cedar-fir-spruce beach ridges and in forests along the Great Lakes shoreline in northern Michigan. Also occurs in upland jack, red, and white pine forests, in conifer-dominated swamps, and at the margins of bedrock glades. The species has not been documented south of Mason County since 1928.
Natural Community Types
- Boreal forest
- Dry northern forest
- Dry-mesic northern forest
- Granite bedrock glade
- Great lakes barrens
- Hardwood-conifer swamp
- Limestone bedrock glade
- Poor fen
- Rich conifer swamp
- Rich tamarack swamp
- Volcanic bedrock glade
- Volcanic bedrock lakeshore
- Wooded dune and swale complex
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.
White cedar, balsam fir, white and black spruce, ram's head orchid, dwarf lake iris, ebony sedge, beauty sedge, Canada mayflower, starflower, gaywings, twinflower, blue-bead lily, goldthread, fly honeysuckle, naked miterwort, and kidney-leaved violet.
This species is vulnerable to excessive logging and impacts to hydrology. Requires protection of habitat and natural disturbance (wind throw) and hydrological regimes.
Random meander search covers areas that appear likely to have rare taxa, based on habitat and the judgement of the investigator.
Survey Period: From third week of May to third week of June
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