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Low Calamint (Calamintha arkansana)
Low Calamint (Calamintha arkansana), a State Special Concern plant, is found most typically on wet dolomite flats on Lake Michigan (Door County), as well as fens and wet prairies. Blooming occurs late June through late September; fruiting occurs late July through late September. The optimal identification period for this species is early July through late August.
Synonyms: Calamintha glabella, Clinopodium arkansanum, Clinopodium glabrum, Hedeoma arkansana, Hedeoma glabra, Micromeria glabella, Satureja arkansana, Satureja glabra, Satureja glabella
- Distinguishing characteristics: Entire plant minty-aromatic when crushed; leaves linear or inversely lance-shaped, and at least 4 times as long as wide; stems square and glabrous, except for a small tuft of hair where each leaf originates.
- Flower characteristics: Flowers 2 to 8, pale purple, tube-shaped, located just above each leaf on the upper part of the plant; petals 8 to 15 mm long.
- Fruit characteristics: Nutlets reticulate, smooth with 1 seed each.
- Leaf characteristics: Linear or inversely lance-shaped, at least 4 times as long as wide, becoming smaller as they near the tip of the plant.
- Blooming phenology: late June through late September
- Fruiting phenology: late July through late September
- Optimum time to identify: early July through late August
- Growth form: Forb-erect
- Vegetative reproduction:
- Life cycle: Perennial
- Comments: Associated Species: Lobelia kalmii, Potentilla fruticosa, Hypeicum kalmianum, Parnassia glauca, Gentiana procera, Solidago ohioensis, Pycnanthemum virginianum, Selaginella eclipes.
Status and Natural Heritage Inventory documented occurrences in Wisconsin
The table below provides information about the protected status - state and federal - and the rank (S and G Ranks) for Low Calamint (Calamintha arkansana). See the Working List Key for more information about abbreviations. Counties shaded blue have documented occurrences for this species in the Wisconsin Natural Heritage Inventory database. The map is provided as a general reference of where this species has been found to date and is not meant as a range map.
|Federal Status in Wisconsin||none|
|Tracked by NHI||Y|
Habitats and landscapes
The Natural Heritage Inventory has developed scores indicating the degree to which each of Wisconsin's rare plant species is associated with a particular natural community or ecological landscape. This information is similar to that found in the Wildlife Action Plan for animals. As this is a work in progress, we welcome your suggestions and feedback.
General habitat information
- Habitat description: Found most typically on wet dolomite flats on Lake Michigan (Door County), as well as fens and wet prairies.
- Soils: Moist, calcareous soils.
This table lists the natural communities that are associated with Low Calamint. Scores for natural community associations are: "significant" association (score=3), "moderate association" (score=2) or the species can be present but is only weakly associated with the community (score=1).
This table lists the ecological landscape association scores for Low Calamint. The scores (3=High, 2=Moderate, 1=Low, 0=None) also correspond to the map.
The Endangered Resources Program has developed avoidance measures and management guidelines for plants on the Natural Heritage Working List. These are a work in progress, and we welcome your suggestions and feedback. Sources used in developing this information can be found here.
These are specific actions designed to avoid "take" (mortality) of this species.
- Avoid known individual plant locations and conduct operations elsewhere when they are least likely to cause damage. Ideally, this would involve frozen, snow-covered ground. However, in areas of the state where frozen conditions are unreliable, very dry soils late in the growing season might be the best available alternative. Consult with a biologist, if needed.
- Avoid broadcast spraying of herbicides; use care with spot spraying.
Management guidelines are additional considerations that may help maintain or enhance habitat for this species
- Minimize disturbance to hydrology, including soil disturbance from rutting.
- Maintain and restore open habitat through selective clearing and brushing.
- Avoid disturbance to shorelines and the forest-beach interface.
- Prescribed burns and/or brushing may be beneficial (dependent on local site conditions).
- Survey for and control invasive plants prior to conducting timber operations, as these can be spread by vehicles and often respond vigorously to increased light; see forestry BMPs for invasive species.
Links to additional Low Calamint information
Other links related to vascular plants (all exit the DNR website)
- Wisconsin Vascular Plants
- Freckmann Herbarium
- Atlas of Wisconsin Prairie and Savanna Flora - Wisconsin State Herbarium
- USDA - NRCS Plants Database
- USGS Midwestern Wetland Flora - field office guide to plant species
- Cofrin Center for Biodiversity Herbarium
- Intermountain Herbarium Grasses of North America
- Orchids of Wisconsin
Support for Wisconsin's rare plant information has been provided by the Division of Forestry, the Endangered Resources Fund and the Wisconsin Rare Plant Preservation Fund. To donate, visit the Natural Resources Foundation of Wisconsin.