Sand Springbeauty - Claytonia arenicola
State Rank Reason (see State Rank above)
Rare in Montana, where it is currently known from only one localized area in the western portion of the state. As an annual, populations likely fluctuate widely from year to year. No specific threats have been identified.
- Details on Status Ranking and Review
Score1-2 - Small to Moderate. Population size is imprecisely known but is believed to be >2,000 individuals and <100,000 individuals.
Score3 - Local Endemic or Very Small Montana Range: Generally restricted to an area <10,000 sq. miles (equivalent to the combined area of Phillips and Valley Counties) or <6 Sub-basins (4th code watersheds) Range-wide OR limited to one Sub-basin in Montana
Area of Occupancy
Score3 - Very Low: Generally occurring in 3 or fewer Subwatersheds (6th Code HUC’s).
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).
ScoreNA - Rank factor not assessed.
CommentTrends unknown, though populations are likely stable or experiencing only minor declines. Habitat generally appears to be stable.
Score0-1 - Low to Medium.
Score1 - Moderate Vulnerability: Specific biological attributes, unusual life history characteristics or limited reproductive potential makes the species susceptible to extirpation from stochastic events or other adverse impacts to its habitat and slow to recover.
Raw Conservation Status Score
9 to 11 total points scored out of a possible 16 (Rarity factors and threats only).
Sand Springbeauty is an annual with usually several lax to erect 5-15 cm long stems which arise from a slender taproot. The linear to narrowly spatulate leaves are 15-60 mm long and occur in a basal rosette; they are opposite on the lower stem. Foliage is glabrous. Several well-separated flowers are borne on spreading stalks that are up to 2 cm long and located at the top of the stem. Each flower has 5 pink-veined, white petals, that are 6-9 mm long; each flower also has 2 sepals that are ca. 2 mm long and 5 stamens. The fruit is a 3-seeded capsule that is approximately as long as the sepals.
Flowering in May.
Potentially confused with Montia dichotoma and M. linearis but these have alternate, linear leaves.
In MT only known from Sanders County; a regional endemic from eastern WA, OR and adjacent ID (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Observations in Montana Natural Heritage Program Database
Number of Observations:
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Map Help and Descriptions
(Observations spanning multiple months or years are excluded from time charts)
Mossy, forested, north-facing talus slopes in the lower montane zone.
- Additional ReferencesLegend: View Online Publication
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- Lesica, P., M. T. Lavin, and P. F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.