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Montana Field Guide

Montana Field Guides

Leatherleaf Saxifrage - Leptarrhena pyrolifolia


Global Rank: G5
State Rank: S4
* (see State Rank Reason below)

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 8

External Links






State Rank Reason (see State Rank above)
Limited distribution in Montana.
  • Details on Status Ranking and Review
    Leatherleaf Saxifrage (Leptarrhena pyrolifolia) Conservation Status Review
    Review Date = 09/04/2012
    View State Conservation Rank Criteria
    Population Size

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

    CommentPopulation size is unknown for Montana, but due to its sparse distribution is estimated to be <100,000 plants.

    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.

    CommentPeripheral and sporadically distributed in northwest Montana.

    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

    Score0-1 - Stable to Minor Declines:

    CommentTrends are unknown, though habitat is generally stable and populations have probably not declined significantly.

    Threats

    Score0-1 - Low to Medium.

    CommentThreats to the species' viability appear to be insignificant to low.

    Intrinsic Vulnerability

    Score0 - Low Vulnerability: Species does not have any unusual or specific life history or biological attributes or limted reproductive potential which makes it susceptible to extirpation from stochastic events or other adverse impacts to its habitat and thus slow to recover.

    CommentNo specific factors are known which are believed to increase the species' vulnerability.

    Raw Conservation Status Score

    Score 4 to 6 total points scored out of a possible 19.

 
General Description
Perennial from horizontal rootstocks. Stems simple, 10–30 cm, glabrous to glandular-hairy. Leaves glabrous, mostly basal, short-petiolate; the blades obovate, dentate, 2–7 cm long, shiny and leathery; stem leaf solitary, sessile, ovate. Inflorescence a terminal, glandular, short-branched panicle. Flowers 5-merous, regular, perfect, perigynous, saucer-shaped; calyx barely adnate to the ovary, 2–3 mm across with oblong lobes ca. 1 mm long; petals white, oblanceolate, unequal, 1–2 mm long; ovary slightly inferior; stamens 10, barely longer than the petals. Fruit reddish, narrowly ovoid follicles 5–10 mm long including the divergent beaks; seeds numerous (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
AK to WA, ID and MT (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 1

(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
Moist to wet soil of meadows, fens, cliffs, often along streams; subalpine, alpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Leatherleaf Saxifrage — Leptarrhena pyrolifolia.  Montana Field Guide.  .  Retrieved on , from