| Gentiana linearis |
| Narrow-leaved Gentian |
Key Characteristics
Medium-sized forb (70 cm) of open moist granitic soils 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 - Threatened (legally protected)
- State Rank: S2 - Imperiled
- Global Rank: G4G5 - Rank is uncertain, ranging from apparently secure to secure
Occurrences
| County Name | Number of Occurrences | Year Last Observed |
|---|---|---|
| Baraga | 2 | 1981 |
| Keweenaw | 1 | 1934 |
| Marquette | 17 | 2005 |
![Occurrence Map for [Sname]](https://webarchive.library.unt.edu/eot2008/20090116104749im_/http://web4.msue.msu.edu/mnfi/maptmp/NFR_Distributions12321026503260.png)
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, 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
Associated Plants
Sedges, grasses, Rubus sp., rattlesnake grass, purple meadow-rue, asters, and bulrush.
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
- Meander search
Survey Period: From first week of July to first week of September
References
Survey References
- Elzinga, C.L., D.W. Salzer, and J.W. Willoughby. 1998. Measuring and Monitoring Plant Populations. The Nature Conservancy and Bureau of Land Management, Denver. BLM Technical Reference 1730-1. 477pp.
- Goff, G.F., G.A. Dawson, and J.J. Rochow. 1982. Site examination for Threatened and Endangered plant species. Environmental Management 6(4): 307-316
- Nelson, J.R. 1984. Rare Plant Field Survey Guidelines. In: J.P. Smith and R. York. Inventory of rare and endangered vascular plants of California. 3rd Ed. California Native Plant Society, Berkeley. 174pp.
- Nelson, J.R. 1986. Rare Plant Surveys: Techniques For Impact Assessment. Natural Areas Journal 5(3):18-30.
- Nelson, J.R. 1987. Rare Plant Surveys: Techniques for Impact Assessment. In: Conservation and management of rare and endangered plants. Ed. T.S. Elias. California Native Plant Society, Sacramento. 8pp.
Technical References
- Gleason, H. A., and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. Second edition. The New York Botanical Garden, Bronx. 910pp.
- Gray, A. 1950. Gray's Manual of Botany; eighth ed. Van Nostrand Reinghold, New York. 1632pp.
- Holmgren, N.H. 1998. Illustrated Companion to Gleason and Cronquist's Manual. Illustrations of the vascular plants of Northeastern United States and adjacent Canada. New York Botanical Garden, Bronx. 937pp.
- Scoggan, H.J. 1978. The Flora of Canada. National Museum of Natural Science Publications Botany 4: 1711pp.
- Voss, E.G. 1996. Michigan Flora. Part III. Dicots (Pyrolaceae-Compositae). Bulletin of the Cranbrook Institute of Science and University of Michigan Herbarium. 622pp.