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Montana Field Guide

Montana Field Guides

Bloom Peak Douglasia - Douglasia conservatorum

Species of Concern

Global Rank: G1G2
State Rank: S1
* (see State Rank Reason below)

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

External Links






State Rank Reason (see State Rank above)
Described as a new species in 2010 from a single location along the Idaho/Montana border. The population of this newly described species is apparently closely allied to Douglasia idahoensis, D. laevigata and D. nivalis (Bjork 2010). Additional research may be needed to determine if this population warrants recognition at the specific level or if it should be treated as conspecific with D. idahoensis or D. nivalis. However, the discovery of this population is significant in that it is a new addition to the state flora no matter if it is treated as a distinct species or as a population of one of the previously mentioned species.
  • Details on Status Ranking and Review
    Bloom Peak Douglasia (Douglasia conservatorum) Conservation Status Review
    Review Date = 06/14/2012
    View State Conservation Rank Criteria
    Population Size

    Score3 - Vey Small: Generally <2,000 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

    Score3 - Very Low: Generally occurring in 3 or fewer Subwatersheds (6th Code HUC’s).

    Environmental Specificity

    Score2 - High: Species is restricted to a highly specialized and limited habitat and is typically dependent upon unaltered, high-quality habitat (C Values of 8-10).

    Trends

    ScoreNA - Rank factor not assessed.

    CommentTrends are unknown, though the habitat appears to be stable. Warming or drying trends may lead to declining population levels.

    Threats

    ScoreNA - Rank factor not assessed.

    CommentHabitat is remote, though a forest road and informal parking area are adjacent to the population.

    Intrinsic Vulnerability

    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

    Score 12 total points scored out of a possible 13. (Rarity factors only).

 
General Description
Mat-forming. Scapes solitary, 12–30 mm long, stellate-pubescent. Leaves papillose, linear to linear-elliptic, 7–17 mm long. Inflorescence a bracteate umbel with 2 to 10 flowers. Flowers on pedicels 3-8 mm long, bractless; calyx pubescent; corolla 10-12 mm long, the 5 lobes 5–6 mm long. Capsule 2–3 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Phenology
Flowering during June.

Diagnostic Characteristics
Douglasia conservatorum can be distinguished from Montana's only other Douglasia species (D. montana) by its longer flowering stems (12-30 mm long vs. 5-20 mm) and the greater number of flowers on each stem (usually 3 or more vs. 1 to 2 in D. montana).

Species Range
Present
 


Range Comments
Currently thought to be restricted to a single location along the Idaho/Montana border.

Summary of Observations Submitted for Montana
Number of Observations: 4

(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, subalpine ridges and slopes with shallow, gravelly soils (Bjork 2010).

References
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Citation for data on this website:
Bloom Peak Douglasia — Douglasia conservatorum.  Montana Field Guide.  .  Retrieved on , from