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White-stemmed globemallow - Sphaeralcea munroana
State Rank Reason (see State Rank above)
Peripheral in southwest Montana where it is known from a few locations. Additional survey and monitoring data are needed. Most documented locations are along roads and 2-tracks, as such, at least several of the populations may be adventive or introduced. Species appears to be tolerant of or perhaps benefits from some disturbance activity. Additional information concerning the conservation needs and population dynamics of this species in Montana is needed to clarify its status.
- Details on Status Ranking and Review
Population Size
Score3 - Vey Small: Generally <2,000 individuals.
CommentA few hundred plants reported at the documented locations.
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
Score2 - Low: Generally occurring in 4-10 Subwatersheds (6th Code HUC’s).
Environmental Specificity
Score0-1 - Low to Moderate.
CommentThe majority of documented occurrences are from roadsides or along 2-tracks.
Trends
ScoreNA - Rank factor not assessed.
CommentTrends are unknown, though habitat is generally stable. Some populations may be adventive, establishing along roads.
Threats
Score0-1 - Low to Medium.
CommentThreats to the species' viability appear to be minor.
Intrinsic Vulnerability
Score0-1 - Low to Moderate Vulnerability.
Raw Conservation Status Score
Score
7 to 10 total points scored out of a possible 16 (Rarity factors and threats only).
General Description
White-stemmed Globe-mallow is a perennial herb with several stems that are 2-8 dm high and arising from a thick, branched taproot. The alternate, petiolate leaves have spade-shaped blades that are 2-6 cm long with shallowly lobed and coarsely toothed margins. The foliage is covered with short, grayish hairs. 1 to a few short-stalked flowers are borne in clusters in a terminal, leafy, spike-like inflorescence. Each of the orange to reddish flowers has a 5-lobed, hairy calyx and 5 separate, oblong, shallowly bilobed petals that are 1-2 cm long. Numerous stamens are united into a tube surrounding the style. The numerous stigmas are globose. The fruit is a flattened-globose capsule with many sections that are ca. 3 mm long; it has the appearance of a peeled orange.
Phenology
Flowering in June-July.
Diagnostic Characteristics
The more common Sphaeralcea coccinea is generally shorter with deeply cleft leaf blades. Sidalcea oregana has pink flowers and linear stigmas.
Species Range
Montana Range
Range Descriptions
Native
Range Comments
WA to sw. MT, south to WY, UT, NV, and CA. Peripheral.
Observations in Montana Natural Heritage Program Database
Number of Observations: 15
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Relative Density
Recency
(Observations spanning multiple months or years are excluded from time charts)
Habitat
Open, often calcareous soil of sagebrush- grasslands in the valley and foothill zones.
Ecological Systems Associated with this Species
References
- Additional ReferencesLegend:
View Online Publication
Do you know of a citation we're missing?- Culver, D.R. 1993. Sensitive plant species inventory in the Centennial Valley, Beaverhead County, Montana. Unpublished report to the Butte District, Bureau of Land Management. Montana Natural Heritage Program, Helena, 42 pp. plus appendices.
Culver, D.R. 1994. Floristic analysis of the Centennial Region, Montana. M.Sc. Thesis. Montana State University, Bozeman. 199 pp.- Lesica, P. and J. Vanderhorst. 1995. Sensitive plant survey of the Sage Creek area, Beaverhead County, Montana, Dillon Resource Area, Bureau of Land Management. Unpublished report to the Bureau of Land Management. Montana Natural Heritage Program. 36 pp. plus appendices.
- Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
- Lesica, P., M.T. Lavin, and P.F. Stickney. 2022. Manual of Montana Vascular Plants, Second Edition. Fort Worth, TX: BRIT Press. viii + 779 p.
- Quire, R.L. 2013. The sagebrush steppe of Montana and southeastern Idaho shows evidence of high native plant diversity, stability, and resistance to the detrimental effects of nonnative plant species. M.Sc. Thesis. Bozeman, MT: Montana State University. 124 p.
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