Gentiana linearis
Narrow-leaved gentian
Image of Gentiana linearis

Photo by Daniel C. Nepstad 

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Key Characteristics

Medium-sized forb (70 cm) of open to partially wooded wetlands in the western Upper Peninsula; leaves opposite, linear (<1 cm wide); tubular flowers blue in terminal clusters and upper leaf axils.

Status and Rank

  • State Status: T
  • State Rank: S2
  • Global Rank: G4G5

Occurrences

County NameNumber of OccurrencesYear Last Observed
Baraga21981
Keweenaw22009
Marquette172009
Distribution map for Gentiana linearis

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

Found primarily in wet meadows, bogs, fens, springy areas, river and stream margins, kettle-holes, and borrow pits in the western Upper Peninsula. It usually occurs in association with granite-derived substrates.

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

Abies balsamea (balsam fir), Acer rubrum (red maple), Agrostis scabra (ticklegrass), Alnus incana (speckled alder), Andromeda glaucophylla (bog-rosemary), Calamagrostis canadensis (blue-joint), Carex diandra, C. lasiocarpa, C. stricta, Chamaedaphne calyculata (leatherleaf), Doellingeria umbellata (flat-topped white aster), Drosera rotundifolia (round-leaved sundew), Glyceria canadensis (rattlesnake grass), Ilex verticillata (mountain holly), Iris versicolor (wild blue flag), Larix laricina (tamarack), Lycopus uniflorus (northern bugle weed), Mentha canadensis (wild mint), Myrica gale (sweet gale), Onoclea sensibilis (sensitive fern), Osmunda regalis (royal fern), Picea mariana (black spruce), Pinus strobus (white pine), Rhododendron groenlandicum (Labrador-tea), Rhynchospora alba (beak-rush), Rubus hispidus (swamp dewberry), Solidago uliginosa (bog goldenrod), Sphagnum spp. (sphagnum mosses), Symphyotrichum puniceum (swamp aster), Thalictrum dasycarpum (purple meadow-rue), Thuja occidentalis (northern white-cedar), Triadenum fraseri (marsh St. John's-wort), Vaccinium angustifolium (low sweet blueberry), V. myrtilloides (Canada blueberry), V. oxycoccos (small cranberry).

Management

Sensitive to hydrological alterations and requires protection from both extreme flooding and excessive drainage.

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 Jun 27, 2017]

References

Survey References

Technical References

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