Small-flower Ipomopsis - Ipomopsis minutiflora
Gilia minutiflora, Microgilia minutiflora
State Rank Reason (see State Rank above)
Rare and peripheral in Montana. Currently documented in the state from one collection from the Bitterroot Valley. Very little is known about this species in the state. Additional surveys are needed. Species may be overlooked/undercollected or perhaps the Montana occurrence could be the result of a more recent and isolated establishment event.
- Details on Status Ranking and Review
Score3 - Vey Small: Generally <2,000 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).
Score1-2 - Moderate to High.
ScoreNA - Rank factor not assessed.
ScoreNA - Rank factor not assessed.
Score1-2 - Moderate to High Vulnerability.
Raw Conservation Status Score
11 to 13 total points scored out of a possible 13 (Rarity factors only).
Small-flower Standing-cypress is an annual with a central stem that is 1-3 dm (4-12) tall, and with branches arising from most leaf axils. The alternate stem leaves are up to 3 cm long and are divided into 3 linear segments below, while above they are simple and linear with entire margins. Basal leaves are lacking. Foliage is glabrous to densely glandular. Small flowers are in the upper leaf axils or solitary at the tips of the numerous ultimate branches. The white or pale blue, tubular corolla is 4-7 mm long and flares to 5 lobes with 5 anthers held just beyond the mouth. The calyx is 5-lobed. The fruit is a rounded capsule with 1-3 seeds.
The plant superficially resembles Epilobium paniculatum but the latter has 4 separate petals. Our other species of Ipomopsis have basal rosettes.
Ravalli County; BC, MT south to OR and ID (Lesica et al. 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, sparsely vegetated slopes with sagebrush on fine-textured soils in the foothills zone.
The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap: Bombus occidentalis
(Pyke et al. 2012).
Threats or Limiting Factors
STATE THREAT SCORE REASON
Threat impact not assigned because threats are not known (MTNHP Threat Assessment 2021).
- Literature Cited AboveLegend: View Online Publication
- Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
- Pyke, G.H., D.W. Inouye, and J.D. Thomson. 2012. Local geographic distributions of bumble bees near Crested Butte, Colorado: competition and community structure revisited. Environmental Entomology 41(6): 1332-1349.
- Additional ReferencesLegend: View Online Publication
Do you know of a citation we're missing?
- Abrams, L. 1951. Illustrated flora of the Pacific states: Washington, Oregon, and California. Vol. 3. Geraniaceae to Scrophulariaceae. Stanford Univ. Press, Stanford, California. 866 pp.
- Argus, G. W. and K. M. Pryer. 1990. Rare vascular plants in Canada our natural heritage. Canadian Museum of Nature, Ottawa, Canada. 191 pp. plus maps.
- Booth, W. E. and J. C. Wright. 1966. Flora of Montana-Part II: dicotyledons. Montana State University, Bozeman, MT. 305 pp.
- Heidel, B. L. 1996. Noteworthy collections - Montana. Madrono 43(3):436-440.
- Hitchcock, C.L., A. Cronquist, M. Ownbey and J.W. Thompson. 1959. Vascular plants of the Pacific Northwest, Part 4. Ericaceae through Campanulaceae. Seattle, WA and London, UK: University of Washington Press. 510 p.
- Peck, M.E. 1961. A manual of the higher plants of Oregon. 2nd edition. Binsford & Mort, Portland, Oregon. 936 pp.