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Montana Field Guide

Montana Field Guides

White-margin Phlox - Phlox albomarginata


Global Rank: G4
State Rank: S4
* (see State Rank Reason below)

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

External Links






State Rank Reason (see State Rank above)
See rank details. Most of the species' distribution and populations are in Montana.
  • Details on Status Ranking and Review
    White-margin Phlox (Phlox albomarginata) Conservation Status Review
    Review Date = 04/26/2013
    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.

    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

    Score0-1 - Moderate to High. Occurs in >10 Subwatersheds (6th Code HUC’s), though the species' distribution is not sufficiently documented to place it within one class.

    Environmental Specificity

    Score0 - Low: Species is a generalist that occurs in a variety of habitats and/or is tolerant of disturbed or degraded habitats (C -Values of 1-4).

    Trends

    ScoreNA - Rank factor not assessed.

    Threats

    ScoreNA - Rank factor not assessed.

    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.

    Raw Conservation Status Score

    Score 2 to 4 total points scored out of a possible 13 (Rarity factors only).

 
General Description
Taprooted, loosely mat-forming. Stems prostrate to ascending, 2–5 cm, sparsely hirsute, glandular above. Leaves stiff, ovate to oblanceolate, 2–6 mm long, mostly puberulent, basally ciliate, white-margined. Flowers solitary; pedicels 0–10 mm long; calyx glandular-hirsute, 6–10 mm long with flat intercostal membranes; corolla white to light blue, the tube 9–12 mm long, lobes 6–9 mm long; style 5–8 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
White-margined phlox is known from southwestern Montana and adjacent Idaho and southwest Wyoming.


Summary of Observations Submitted for Montana
Number of Observations: 3

(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
Stony, calcareous soil of grasslands, rock outcrops; valleys to (rarely) subalpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
White-margin Phlox — Phlox albomarginata.  Montana Field Guide.  .  Retrieved on , from