Stalk-leaved Monkeyflower - Mimulus ampliatus
Mimulus patulus, Mimulus washingtonensis
State Rank Reason (see State Rank above)
See rank details.
- 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.
CommentPopulation levels are poorly documented and likely fluctuate widely from year to year.
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
Score1 - Moderate: Generally occurring in 11-25 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 are unknown, though there is no indication that the species' has experienced severe declines in Montana.
Score0-1 - Low to Medium.
CommentSome occurrences are near areas of human-use and have the potential to be negatively impacted. However, no threats have been identified that would be high in terms of scope or severity.
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
6 to 8 total points scored out of a possible 16 (Rarity factors and threats only).
Annual. Stems erect, simple or branched, 2–12 cm. Herbage glabrate to glandular-puberulent. Leaves petiolate; blade ovate, dentate, 2–10 mm long. Flowers: calyx purplish, 4–8 mm long, ca. 0.5 mm long; pedicel 2-3 times as long as calyx; corolla yellow, 10–15 mm long, bilabiate, lower lip longer, little deflexed from the upper lip. Capsule 3–6 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
Flowering in late June - early July.
MT specimens have previously been incorrectly referred to M. patulus or M. washingtonensis. Additionally, most past reports of M. floribundus were mis-identified and belong here.
Endemic to central ID and western MT (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)
Open seeps and vernally moist soil along slopes, cliffs and streams from the valleys to the subalpine 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.