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Montana Field Guide

Montana Field Guides

Ballhead Ipomopsis - Ipomopsis congesta ssp. crebrifolia
Other Names:  Gilia congesta var. crebrifolia

Species of Concern

Global Rank: G5T3T4
State Rank: S2S3
* (see State Rank Reason below)

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank: 3
C-value:

External Links






State Rank Reason (see State Rank above)
Rare and peripheral in Montana. Currently known from only a small geographic area encompassing parts of the Centennial Mountains to the Monida Pass area in southwest Montana. Additional data on population levels are needed, though it is expected that populations are stable. Potential threats to the known occurrences appear to be minimal or non-existent at the current time.
  • Details on Status Ranking and Review
    Ballhead Ipomopsis (Ipomopsis congesta ssp. crebrifolia) Conservation Status Review
    Review Date = 05/29/2013
    View State Conservation Rank Criteria
    Population Size

    Score1-2 - Small to Moderate. Population size is imprecisely known but is believed to be >2,000 individuals and <100,000 individuals.

    Range Extent

    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

    Score2 - Low: Generally occurring in 4-10 Subwatersheds (6th Code HUC’s).

    Environmental Specificity

    Score1-2 - Moderate to High.

    Trends

    ScoreNA - Rank factor not assessed.

    Threats

    Score0-1 - Low to Medium.

    Intrinsic Vulnerability

    Score0-1 - Low to Moderate Vulnerability.

    Raw Conservation Status Score

    Score 7 to 11 total points scored out of a possible 16 (Rarity factors and threats only).

 
General Description
Ballhead Gilia is an herbaceous, sometimes mat-forming perennial with several ascending to nearly prostrate, usually unbranched stems that are up to 12 cm tall and arising from a branched rootcrown. The strap-shaped, entire-margined, basal leaves are up to 2 cm long, but the alternate stem leaves become smaller upward. Foliage is light green and glabrous. Numerous flowers are borne in a spherical cluster at the tops of the stems. The white, tubular corolla is 3-4 mm long and flares into 5 lobes at the mouth; the 5 anthers are held just beyond the mouth. The calyx tube has 5 pointed lobes. The fruit is a rounded capsule that is 2-4 mm long and has 1-3 seeds.

Phenology
Flowering in June-July, fruiting in late July.

Diagnostic Characteristics
The entire leaves and sprawling habit separate this from other species of Ipomopsis. Colloima debilis will also form loose mats, but the flowers are not so tightly clustered.

Species Range
Present
 


Range Comments
Regional endemic of southwestern Montana, western Wyoming, western Utah, and northern New Mexico.


Summary of Observations Submitted for Montana
Number of Observations: 16

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat
Open, often eroding sandy soil of sagebrush steppe in the foothill zone.

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.
    • Lesica, P., M. T. Lavin, and P. F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
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Citation for data on this website:
Ballhead Ipomopsis — Ipomopsis congesta ssp. crebrifolia.  Montana Field Guide.  .  Retrieved on , from