Plants and Animals
Pycnanthemum verticillatum Whorled mountain mint
Tall forb (1 m) of moist shores and meadows; stems densely pubescent; minty-aromatic leaves sessile and lanceolate, more than 3 times long as wide, pubescent only on the veins on the undersurface; flowers white, borne in dense terminal clusters.
Status and Rank
State Status: SC - Special Concern (rare or uncertain; not legally protected)
Global Rank: G5 - Secure
State Rank: S2 - Imperiled
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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.
Whorled mountain-mint is found in seasonally flooded wetlands formed in shallow depressions and potholes in glacial lakeplain and outwash landscapes.
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.
Numerous graminoids associated with coastal plain marshes, including Engelmann's spikerush, panic grasses, meadow beauty, autumn-grass, blue-eyed-grass, lance-leaved violet, and bulrushes.
The species requires conservation and protection of hydrology of intermittent wetlands. It is also vulnerable to ORV impacts and dredging and filling of sites.
Random meander search covers areas that appear likely to have rare taxa, based on habitat and the judgment of the investigator.
Survey Period: From first week of August to fourth week of September
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