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Montana Field Guide

Montana Field Guides

Lyall Phacelia - Phacelia lyallii

Native Species

Global Rank: G3G4
State Rank: S3S4
(see State Rank Reason below)

Agency Status
MNPS Threat Rank:

External Links

State Rank Reason (see State Rank above)
Phacelia lyallii is known from most major mountain ranges in western Montana. The number of occurrences plus its habitat preference (high elevation, alpine sites) significantly reduce any concerns for the species’ viability.
  • Details on Status Ranking and Review
    Lyall Phacelia (Phacelia lyallii) Conservation Status Review
    Review Date = 05/31/2012
    View State Conservation Rank Criteria
    Population Size

    Score1-2 - Small to Moderate. Population size is imprecisely known but is believed to be >2,000 individuals and <100,000 individuals.

    CommentAs most observation records are from specimen collections, population levels are poorly documented.

    Range Extent

    Score2 - Regional or State Endemic or Small Montana Range: Generally restricted to an area <100,000 sq. miles (equivalent to 2/3 the size of Montana or less) or Montana contributes 50% or more of the species’ range or populations OR limited to 2-3 Sub-basins in Montana.

    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).


    Score0-1 - Stable to Minor Declines:

    CommentLikely stable to minor declines as its habitat is not being negatively impacted.


    Score0-1 - Low to Medium.

    Intrinsic Vulnerability

    Score0-1 - Low to Moderate Vulnerability.

    Raw Conservation Status Score

    Score 4 to 8 total points scored out of a possible 19.

General Description
Perennial, often with a branched caudex. Stems ascending to erect, usually simple, 5–25 cm. Herbage sparsely strigose, hirsute above. Leaves mostly basal; blade 2–8 cm long, oblanceolate, pinnately lobed ca. halfway into deltoid segments. Inflorescence a densely flowered, compound, terminal cyme. Flowers: calyx hirsute 4–6 mm long; corolla campanulate, blue, pubescent, 5–9 mm long, lobes 3–5 mm long; stamens, exserted, ca. 2 times as long as corolla; style exserted, divided <1/2-way. Seeds several, reticulate (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range

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

Observations in Montana Natural Heritage Program Database
Number of Observations: 74

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



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

Meadows, along streams, rocky slopes; subalpine, alpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Lackschewitz, K. 1991. Vascular plants of west-central Montana--identification guidebook. U.S. Forest Service Intermountain Research Station, Ogden, UT. 648 pp.
    • Lesica, P., M. T. Lavin, and P. F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
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Citation for data on this website:
Lyall Phacelia — Phacelia lyallii.  Montana Field Guide.  .  Retrieved on , from