Spreading Fleabane - Erigeron divergens
Taprooted biennial or short-lived perennial. Stems erect, 10–40 cm, often branched at the base of a simple caudex. Herbage short-hirsute; hairs spreading or ascending. Leaves basal and cauline; blades obovate to oblanceolate, 1–5 cm long, entire; basal usually withered at flowering; cauline becoming sessile, linear above. Heads at least several, radiate, nodding in bud. Involucres hemispheric, 3–5 mm high; phyllaries in 3 to 4 series, glandular, hirsute with a brown midvein. Rays 70 to 150, white, 4–8 mm long. Disk corollas 2–3 mm long. Achenes ca. 1 mm long (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX
BC, AB south to CA, AZ, NM, TX and Mexico (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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(Observations spanning multiple months or years are excluded from time charts)
Grasslands, sagebrush steppe, open forest, roadsides; plains, valleys, montane (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX
The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap: Bombus bifarius
, Bombus centralis
, Bombus fervidus
, Bombus flavifrons
, Bombus huntii
, Bombus melanopygus
, Bombus mixtus
, Bombus rufocinctus
, Bombus occidentalis
, and Bombus insularis
(Thorp et al. 1983, Wilson et al. 2010, Colla and Dumesh 2010, Koch et al. 2012).
- 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.
- Koch, J., J. Strange, and P. Williams. 2012. Bumble bees of the western United States. Washington, DC: USDA Forest Service, Pollinator Partnership. 143 p.
- Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
- Thorp, R.W., D.S. Horning, and L.L. Dunning. 1983. Bumble bees and cuckoo bumble bees of California (Hymenoptera: Apidae). Bulletin of the California Insect Survey 23:1-79.
- Wilson, J.S., L.E. Wilson, L.D. Loftis, and T. Griswold. 2010. The montane bee fauna of north central Washington, USA, with floral associations. Western North American Naturalist 70(2): 198-207.
- Additional ReferencesLegend: View Online Publication
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- Cope, M.G. 1992. Distribution, habitat selection and survival of transplanted Columbian Sharp-tailed Grouse (Tympanuchus phasianellus columbianus) in the Tobacco Valley, Montana. M.Sc. Thesis. Bozeman, Montana: Montana State University. 60 p.
- Douglass, R.J. 1973. Spatial interactions and microhabitat selections of two locally sympatric voles, Microtus montanus and Microtus pennsylvanicus. Ph.D. Dissertation. Bozeman, Montana: Montana State University. 48 p.
- Durham, R. A., D. L. Mummey, L. Shreading, and P.W. Ramsey. 2017. Phenological patterns differ between exotic and native plants: Field observations from the Sapphire Mountains, Montana. Natural Areas Journal, 37(3), 361–381.
- 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.
- Martinka, R.R. 1970. Structural characteristics and ecological relationships of male blue grouse (Dendragapus obscurus (Say)) territories in southwestern Montana. Ph.D Dissertation. Bozeman, MT: Montana State University. 73 p.
- Simanonok, M. 2018. Plant-pollinator network assembly after wildfire. Ph.D. Dissertation. Bozeman, MT: Montana State University. 123 p.
- Simanonok, M.P. and L.A. Burkle. 2019. Nesting success of wood-cavity-nesting bees declines with increasing time since wildfire. Ecology and Evolution 9:12436-12445.
- Skilbred, Chester L. 1979. Plant succession on five naturally revegetated strip-mined deposits at Colstrip, Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 128 pp.