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Montana Field Guides

Northern Rattlesnake-plantain - Goodyera repens

Species of Concern

Global Rank: G5
State Rank: S3
* (see State Rank Reason below)

Agency Status
USFWS:
USFS: SENSITIVE
BLM:
MNPS Threat Rank: 2
C-value: 6

External Links






State Rank Reason (see State Rank above)
A widespread species that is found in Montana in the Little Belt and Big Snowy Mountains and at one site in Glacier National Park. The species occupies moist, montane forests with a mossy understory. Occurrences are vulnerable to disturbances that open or reduce the canopy such as timber harvesting and fire. Monitoring of the species in the Little Belt Mountains have documented negative impacts associated with both disturbances. However, Goodyera repens is known from approximately 20 moderate to large-sized populations and many additional, smaller occurrences. Recent trends are unknown.
  • Details on Status Ranking and Review
    Northern Rattlesnake-plantain (Goodyera repens) Conservation Status Review
    Review Date = 06/13/2012
    View State Conservation Rank Criteria
    Population Size

    Score1 - Moderate: Generally 10,000-100,000 individuals.

    Range Extent

    Score1 - Peripheral, Disjunct or Sporadic Distribution in MT: Widespread species that is peripheral, disjunct or sporadically distributed within MT such that it occurs in <5% of the state (<7,500 sq. miles or the combined area of Beaverhead and Ravalli Counties) or is restricted to 4-5 sub-basins.

    Area of Occupancy

    Score1 - Moderate: Generally occurring in 11-25 Subwatersheds (6th Code HUC’s).

    Environmental Specificity

    Score1 - Moderate: Species is restricted to a specific habitat that is more widely distributed or to several restricted habitats and is typically dependent upon relatively unaltered, good-quality habitat (C Values of 5-7).

    Trends

    ScoreNA - Rank factor not assessed.

    Threats

    Score1 - Medium: 11-30% of the populations are being negatively impacted or are likely to be impacted by one or more activities or agents, which are expected to result in decreased populations and/or habitat quality and/or quantity.

    CommentAny activities or events that substantially reduce the overstory and/or removes the duff/litter layer, such as thinning and logging operations or severe fires are likely to have adverse impacts.

    Intrinsic Vulnerability

    Score2 - High Vulnerability: Very specific biological attributes, unusual life history characteristics or limited reproductive potential makes the species highly susceptible to extirpation from stochastic events or other adverse impacts to its habitat and very slow to recover.

    Raw Conservation Status Score

    Score 7 total points scored out of a possible 16 (Rarity factors and threats only).

 
General Description
Northern Rattlesnake-plantain is an herbaceous perennial with unbranched stems that are 1-2 dm high and which arise from extensive rhizomes. The mostly basal leaves have a broad petiole that is 5-15 mm long and an elliptic blade that is 15-30 cm long. The leaves are dark green, and the stem is glandular above. Sessile flowers are borne on one side of the upper stem. The white to pale green flowers consist of a hood-like upper petal that is 3-4 mm long and of a pouched lower petal that is ca. 2 mm deep and has a sepal on each side. The corolla arises from the top of the oblong ovary. The club-shaped, many-seeded capsule is ca. 1 cm long.

Phenology
Flowering in August.

Diagnostic Characteristics
The inflorescence of G. oblongifolia is mostly greater than 6 cm long, and the leaf blades are more than 3 cm long and generally have a broad, white midvein.

Species Range
Montana Range

Click the legend blocks above to view individual ranges.
 


Range Comments
Circumboreal south to AZ, NM, SD, TN and NC. Known from Flathead and Judith Basin counties (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 273

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat
North-facing, mossy forested slopes in the montane zone.
Predicted Suitable Habitat Model

This species has a Predicted Suitable Habit Model available.

To learn how these Models were created see http://mtnhp.org/models

Ecological Systems Associated with this Species

References
  • Additional ReferencesLegend:   View Online Publication
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    • Achuff, P. and L.A. Schassberger. 1991. Status review of Goodyera repens, USDA Forest Service, Region 1, Lewis and Clark National Forest. Unpublished report to the Lewis and Clark National Forest. Montana Natural Heritage Program, Helena, Montana. 52 pp.
    • Achuff, P.L. 1992. Status review update of Goodyera repens, Lewis and Clark National Forest. Unpublished report to the Lewis and Clark National Forest. Montana Natural Heritage Program, Helena, MT. 38 pp.
    • Alexander, C. and G. Hadley. 1984. The effect of mycorrhizal infection of Goodyera repens and its control by fungicide. New Phytologist. 97:391-400.
    • Barclay-Estrup, P., Duralia, T.E., and A.G. Harris. 1991. Flowering sequence of the orchid genus Goodyera in Thunder Bay District, Ontario. Rhodora 93(874):141-147.
    • Catling, P. M. 1983. Autogamy in eastern Canadian Orchidaceae: a review of current knowledge and some new observations. Naturaliste Canada 110:37-53.
    • Lesica, P., M. T. Lavin, and P. F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Phillips, H.W. 1989. Noteworthy collection - Montana (Goodyera repens). Madrono 36:174.
    • Phillips, H.W. 1995. Conservation strategy for northern rattlesnake-plantain (Goodyera repens), Lewis and Clark National Forest. Unpublished report. Lewis and Clark National Forest. 6 pp. plus maps.
    • Sood, S.K. 1988. Development of gametophytes, embryogeny and pericarp in Goodyera repens (Orchidaceae, Neottieae). Proceedings of Indian Academy of Science (Plant Sci.) 98:149-156.
    • Vij, S. P. and G. C. Gupta. 1975. Cytological investigations into W. Himilayan Orchidaceae 1. Chromosome numbers and karyotypes of taxa from Kashmir. Cytologia 40:613-621.
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Citation for data on this website:
Northern Rattlesnake-plantain — Goodyera repens.  Montana Field Guide.  .  Retrieved on , from