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Clustered Broomrape - Orobanche fasciculata
Native Species
Global Rank:
G4G5
State Rank:
S4
(see State Rank Reason below)
C-value:
Agency Status
USFWS:
USFS:
BLM:
External Links
State Rank Reason (see State Rank above)
Numerous collections at MONTU from Toole, Glacier, Teton, Ravalli, Beaverhead, Powder River, Phillips, Garfield, Broadwater...and others.
Usually present in small numbers, but may have a lengthy dormancy period while living off their hosts.
Found over a very wide area of Montana.
- Details on Status Ranking and Review
Population Size
Score1 - Moderate: Generally 10,000-100,000 individuals.
CommentPopulation size is estimated.
Range Extent
Score0 - Widespread species within Montana (occurs in 5% or more of the state or generally occurring in 6 or more sub-basins.) as well as outside of Montana.
Area of Occupancy
Score0 - High: Occurs in >25 Subwatersheds (6th Code HUC’s).
Environmental Specificity
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).
Trends
Score1 - Minor Declines: Species has experienced declines of 10-30% in population size, range extent and/or occupied area in the recent past (approximately 30 years).
CommentTrends are undocumented but likely to be declining due to reductions in sagebrush.
Threats
Score1 - Medium: 11-30% of the populations are being negatively impacted or are likely to be impacted by one or more activities or agents, which are expected to result in decreased populations and/or habitat quality and/or quantity.
Intrinsic Vulnerability
Score1-2 - Moderate to High Vulnerability.
Raw Conservation Status Score
Score
5 to 6 total points scored out of a possible 19.
General Description
Stems 3–8 cm above ground. Herbage yellow to purplish, glandular-puberulent. Inflorescence a short, bracteate, glandular raceme of 3 to 10 flowers; pedicels erect, 2–8 cm long. Flowers: calyx 7–10 mm long; sepals deltoid, 3–6 mm long; corolla 15–30 mm long, brownish-red, yellow within the mouth, the lobes 2–6 mm long. Capsule 10–13 mm long (
Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Species Range
Montana Range
Range Descriptions
Native
Range Comments
YT south to Mexico, OK and IN (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Observations in Montana Natural Heritage Program Database
Number of Observations: 138
(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
Ecology
POLLINATORS The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap:
Bombus pensylvanicus (Colla and Dumesh 2010).
References
- Literature Cited AboveLegend:
View Online Publication
Colla, S.R. and S. Dumesh. 2010. The bumble bees of southern Ontario: notes on natural history and distribution. Journal of the Entomological Society of Ontario 141:39-68.- Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
- Additional ReferencesLegend: View Online Publication
Do you know of a citation we're missing?- Culver, D.R. 1994. Floristic analysis of the Centennial Region, Montana. M.Sc. Thesis. Montana State University, Bozeman. 199 pp.
- Harvey, S.J. 1990. Responses of steppe plants to gradients of water soil texture and disturbance in Montana, U.S.A. Ph.D. Thesis. Bozeman, MT: Montana State University. 34 p.
- Hawkins, P.H. 1903. The alpine flora of Montana. M.Sc. Thesis, Bozeman, MT: Montana State University. 24 pp.
- Jorgensen, H.E. 1970. Ecological aspects of the life history of Agropyron smithii Rydb. in Central Montana, with related effects of selective herbicide treatments of rangeland. Ph.D. Dissertation. Bozeman, MT: Montana State University. 118 p.
- 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.
- Quire, R.L. 2013. The sagebrush steppe of Montana and southeastern Idaho shows evidence of high native plant diversity, stability, and resistance to the detrimental effects of nonnative plant species. M.Sc. Thesis. Bozeman, MT: Montana State University. 124 p.
- Rundquist, V.M. 1973. Avian ecology on stock ponds in two vegetational types in north-central Montana. Ph.D. Dissertation. Bozeman, MT: Montana State University. 112 p.
- Seipel, T.F. 2006. Plant species diversity in the sagebrush steppe of Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 87 p.
- Tschache, O.P. 1970. Effects of ecological changes induced by various sagebrush control techniques on small mammal populations. M.Sc. Thesis. Bozeman, MT: Montana State University. 51 p.
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