White-margin Phlox - Phlox albomarginata
(see State Rank Reason below)
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
Score0-1 - Moderate to Large: Population size is imprecisely known but is believed to be >10,000 individuals.
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.
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).
ScoreNA - Rank factor not assessed.
ScoreNA - Rank factor not assessed.
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
2 to 4 total points scored out of a possible 13 (Rarity factors only).
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 et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX
White-margined phlox is known from southwestern Montana and adjacent Idaho and southwest Wyoming.
Observations in Montana Natural Heritage Program Database
Number of Observations:
(Click on the following maps and charts to see full sized version)
Map Help and Descriptions
(Observations spanning multiple months or years are excluded from time charts)
Stony, calcareous soil of grasslands, rock outcrops; valleys to (rarely) subalpine (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX
The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap: Bombus vagans
, Bombus flavifrons
, Bombus melanopygus
, Bombus pensylvanicus
, Bombus bimaculatus
, Bombus griseocollis
, Bombus impatiens
, and Bombus kirbiellus
(Shaw and Taylor 1986, Colla and Dumesh 2010).
- Literature Cited AboveLegend: View Online Publication
- Colla, S.R. and S. Dumesh. 2010. The bumble bees of southern Ontario: notes on natural history and distribution. Journal of the Entomological Society of Ontario 141:39-68.
- Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
- Shaw, D.C. and R.J. Taylor.1986. Pollination ecology of an alpine fell-field community in the North Cascades. Northwest Science 60:21-31.
- Additional ReferencesLegend: View Online Publication
Do you know of a citation we're missing?
- Chadde, S.W. 1985. Initial recovery patterns of southwestern Montana foothill range. M.Sc. Thesis. Bozeman, MT: Montana State University. 103 p.
- Simanonok, M. 2018. Plant-pollinator network assembly after wildfire. Ph.D. Dissertation. Bozeman, MT: Montana State University. 123 p.
- Simanonok, M.P. and L.A. Burkle. 2019. Nesting success of wood-cavity-nesting bees declines with increasing time since wildfire. Ecology and Evolution 9:12436-12445.