Helenium autumnale Linnaeus (Q2705)

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Helenium autumnale is a taxon with the rank species within the genus Helenium
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Helenium autumnale Linnaeus
Helenium autumnale is a taxon with the rank species within the genus Helenium

    Statements

    taxon/id/Helenium autumnale Linnaeus
    0 references
    Helenium autumnale Linnaeus
    Helenium autumnale
    Linnaeus
    FNA Editorial Committee. 2006. Flora of North America north of Mexico. Volume 21: Magnoliophyta: Asteridae, part 8: Asteraceae, part 3. Oxford University Press, New York.
    accepted
    hélénie automnale (French)
    hélénie d'automne (French)
    common sneezeweed (English)
    sneezeweed (English)
    fall sneezeweed (English)
    swamp sunflower (English)
    Common sneezeweed (English)
    hélénie automnale (English)
    1 reference
    Klinkenberg, B. (ed.). 2010+. E-Flora BC: Electronic Atlas of the Plants of British Columbia. Lab. for Advanced Spatial Analysis, Department of Geography, University of British Columbia, Vancouver, B.C. http://www.eflora.bc.ca http://www.eflora.bc.ca/
    1 reference
    Moss, E.H. 1983. Flora of Alberta. 2nd edition, revised by J.G. Packer. University of Toronto Press, Toronto. 687 pp.
    1 reference
    Harms, V.L. 2006. Annotated catalogue of Saskatchewan vascular plants. http://www.biodiversity.sk.ca/Docs/AnnotatedCatalogueSKVascPlants2006.pdf
    1 reference
    Newmaster, S.G. & S. Ragupathy. 2005. Flora Ontario - Integrated Botanical Information System (FOIBIS), Phase I. University of Guelph, Canada. http://www.uoguelph.ca/foibis http://www.uoguelph.ca/foibis/
    1 reference
    Marie-Victorin, Fr. 1995. Flore laurentienne. 3e éd. Mise à jour et annotée par L. Brouillet, S.G. Hay, I. Goulet, M. Blondeau, J. Cayouette et J. Labrecque. Gaétan Morin éditeur. 1093 pp.
    1 reference
    Porsild, A.E. & W.J. Cody. 1980. Vascular Plants of the Continental Northwest Territories, Canada. National Museum of Natural Sciences, Ottawa, Ont. 667 pp.
    Flowering (Jul–)Aug–Oct(–Nov).
    roadsides
    fields
    streams
    ditches
    seepage areas
    Stems 1 (–7), branched distally, strongly winged, sparsely to densely hairy proximally, moderately to densely hairy distally.
    Leaves usually moderately to densely hairy, sometimes glabrous;
    basal blades (withered by flowering) lanceolate, oblanceolate, or obovate, entire or weakly lobed;
    distal blades oblanceolate to lanceolate, entire or dentate.
    Heads 5–70 (–100+) per plant, in paniculiform arrays.
    Peduncles 3–10 cm, moderately to densely hairy.
    Involucres globoid, 8–20 × 8–23 mm.
    Phyllaries (connate proximally) moderately to densely hairy.
    Ray-florets 8–21, pistillate, fertile;
    corollas yellow, 10–23 × 4–10 mm.
    Disc-florets 200–400 (–800+);
    corollas yellow proximally, yellow to yellowbrown distally, 2.4–4 mm, lobes 5.
    Cypselae 1–2 mm, sparsely to moderately hairy;
    pappi of 5–7 entire, aristate scales (0.5–) 0.9–1.5 (–1.8) mm.