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Montana Field Guides

Western Featherbells - Stenanthium occidentale
Other Names:  Anticlea occidentalis


Global Rank: G4G5
State Rank: S4
* (see State Rank Reason below)

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 7

External Links






State Rank Reason (see State Rank above)
See rank details.
  • Details on Status Ranking and Review
    Western Featherbells (Stenanthium occidentale) Conservation Status Review
    Review Date = 09/04/2012
    View State Conservation Rank Criteria
    Population Size

    Score0-1 - Moderate to Large: Population size is imprecisely known but is believed to be >10,000 individuals.

    CommentPopulation size is unknown for Montana, though it may be more than 100,000 plants.

    Range Extent

    Score0 - Widespread species within Montana (occurs in 5% or more of the state or generally occurring in 6 or more sub-basins.) as well as outside of Montana.

    CommentSporadically distributed in western Montana, though it likely occurs in more than 6 sub-basins.

    Area of Occupancy

    Score0 - High: Occurs in >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.

    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

    Score0-1 - Low to Moderate Vulnerability.

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

    Raw Conservation Status Score

    Score 1 to 3 total points scored out of a possible 16 (Rarity factors and threats only).

 
General Description
Glabrous perennial from an elongate bulb. Stems ascending to erect, 15–55 cm. Leaves petiolate, basal; blades linear-oblanceolate, 5–25 cm × 2–20 mm. Inflorescence a simple or branched, linear-bracteate raceme with 3 to 20 well-separated, nodding flowers. Flowers regular, campanulate, yellow-green to purplish; tepals united at the base, 8–15 mm long, linear-lanceolate with spreading, acuminate tips; stamens barely included; ovary superior or slightly inferior; style deeply 3-branched. Fruit a lanceoloid, 3-beaked capsule ca. 15 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
BC, AB south to CA, ID and MT (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 11

(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, often shallow soil of coniferous forest, often along streams, cool shaded slopes, cliffs; valleys to lower alpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Western Featherbells — Stenanthium occidentale.  Montana Field Guide.  .  Retrieved on , from