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Mojave Brickellbush - Brickellia oblongifolia
State Rank Reason (see State Rank above)
Brickellia oblongifolia is rare in Montana with only a few known occurrences. Data on these occurrences is at least 20 years old. The status of one historical occurrence documented from a 1921 collection near Wilsall is unknown. Reported threats to the species in Montana are rated as low to moderate. Population trends, though undocumented, are presumed as relatively stable.
Surveys that bring forth current information on distributions, population counts, habitat condition, and threats is greatly needed. Surveys in potentially suitable habitat is also needed to help assign a more accurate state conservation rank.
General Description
Glandular-puberulent herb or subshrub, 1-6 dm tall, generally with many stems from near the base. Leaves all cauline, mostly sessile, alternate or occasionally opposite to subopposite, entire or nearly so, lance-linear to oblong or elliptic, 1-4 cm long and up to 15 mm wide. Leaves mostly 2-8 times as long as wide. Heads terminating the branches or subcorymbosely clustered and relatively large. The involucres 10-20 mm high with acute to acuminate bracts. Flowers ochroleucous, numerous with about 40-50 flowers in each head. Achenes 4.5-6 mm long.
Diagnostic Characteristics
Similar to Brickellia grandiflora, which differs in having broad, toothed leaves. B. eupatorioides closely resembles B. oblongifolia, but has toothed leaves and feathery (plumose) pappus bristles on the top of the fruit. Only the typic variety of B. oblongifolia is known in Montana.
Species Range
Montana Range
Range Descriptions
Native
Range Comments
BC south to CA, AZ and NM (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Observations in Montana Natural Heritage Program Database
Number of Observations: 13
(Click on the following maps and charts to see full sized version)
Relative Density
Recency
(Observations spanning multiple months or years are excluded from time charts)
Habitat
Grows on rock outcrops, talus and scree, and on dry, sparsely-vegetated, southerly slopes.
National Vegetation Classification System Groups Associated with this Species
Shrubland
Arid - Saline Shrubland
Foothills - Montane Shrubland
Sagebrush Shrubland
Sparse and Barren
Sparse and Barren
Stewardship Responsibility
Threats or Limiting Factors
Reported threats to Montana's populations of Mojave Brickellbush include the presence of noxious weeds and off-highway vehicle (OHV) use. One population is located where concentrated OHV activity is the dominant land use; however, data to document the impact is lacking.
References
- 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.
MTNHP Threat Assessment. 2021. State Threat Score Assignment and Assessment of Reported Threats from 2006 to 2021 for State-listed Vascular Plants. Botany Program, Montana Natural Heritage Program, Helena, Montana.
- Additional ReferencesLegend: View Online Publication
Do you know of a citation we're missing?- Lesica, P., M.T. Lavin, and P.F. Stickney. 2022. Manual of Montana Vascular Plants, Second Edition. Fort Worth, TX: BRIT Press. viii + 779 p.
- Web Search Engines for Articles on "Mojave Brickellbush"
