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Orange Sneezeweed - Helenium hoopesii
Other Names:
Dugaldia hoopesii, Hymenoxys hoopesii
General Description
Orange Sneezeweed is an herbaceous perennial with several stems that are 20-100 cm tall and which arise from a short rhizome or branched, fibrous-rooted crown. The oblong, lance-shaped, entire-margined basal leaves are 10-30 cm long and 1-5 cm wide with a wide petiole. The numerous, alternate stem leaves become smaller and sessile upward. Foliage is glabrous or sparsely long-hairy. Several flower heads are borne in a flat-topped inflorescence at the top of the stem. Each head has two series of narrow, pointed, hairy involucral bracts. The 17-25 yellowish-orange rays are 15-30 mm long and 3-lobed at the tip. The numerous yellow disk flowers are ca. 5 mm long. The hairy, 4-angled achenes are topped by 5-10 stiff, white, long-pointed scales.
Phenology
Flowering in July-August.
Diagnostic Characteristics
The tall, leafy stems and 3-lobed, orange rays are diagnostic.
Range Comments
OR to MT, south to CA, AZ and NM. One collection from Beaverhead County (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Habitat
Moist, often disturbed soil of meadows and grasslands in the montane zone.
Ecology
POLLINATORS The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap:
Bombus bifarius,
Bombus frigidus,
Bombus sylvicola,
Bombus impatiens, and
Bombus insularis (Thorp et al. 1983, Colla and Dumesh 2010, Pyke et al. 2012, Williams et al. 2014).
Stewardship Responsibility
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.
- Pyke, G.H., D.W. Inouye, and J.D. Thomson. 2012. Local geographic distributions of bumble bees near Crested Butte, Colorado: competition and community structure revisited. Environmental Entomology 41(6): 1332-1349.
- 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.
- Williams, P., R. Thorp, L. Richardson, and S. Colla. 2014. Bumble Bees of North America. Princeton, NJ: Princeton University Press. 208 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.
- Lackschewitz, K., P. Lesica, and J. S. Shelly. 1988. Noteworthy collections: Montana. Madrono 35:355-358.
- 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.
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