Helianthus giganteus Linnaeus (Q2754)
Helianthus giganteus is a taxon with the rank species within the genus Helianthus
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Helianthus giganteus Linnaeus
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Helianthus giganteus is a taxon with the rank species within the genus Helianthus
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Statements
taxon/id/Helianthus giganteus Linnaeus
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Helianthus giganteus Linnaeus
Helianthus giganteus
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
1 reference
CA-BC
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Douglas, G.W., G.B. Straley, D.V. Meidinger & J. Pojar. 1998. Illustrated Flora of British Columbia. B.C. Ministry of Environment, Lands & Parks and B.C. Ministry of Forests. Victoria. Crown Publications. 8 vols.
CA-AB
1 reference
Gould, J. 2010. (pers. comm.)
CA-SK
1 reference
Harms, V.L. 2003. Checklist of the Vascular Plants of Saskatchewan and the provincially and nationally rare native plants in Saskatchewan. University of Saskatchewan, University Extension Press.
CA-MB
1 reference
Manitoba Checklist, 2002
CA-ON
1 reference
Newmaster, S.G., A. Lehela, M.J. Oldham, P.W.C. Uhlig & S. McMurray. 1998. Ontario Plant List. Ontario Forest Research Institute, Sault Ste. Marie, Ontario. Forest Information Paper No. 123. 550 pp.
CA-QC
present
introduced
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.
CA-NB
1 reference
Hinds, H.R. 2000. Flora of New Brunswick : a manual for the identification of the vascular plants of New Brunswick. 2nd edition. Biology Department, University of New Brunswick, Fredericton. 699 pp.
CA-NS
1 reference
Zinck, M. 1998. Roland's Flora of Nova Scotia. Nimber Publishing & Nova Scotia Museum. Halifax, N. S. 2 vols. 1297 pp.
Newfoundland, CA
excluded
1 reference
Maunders, J. 2009. (pers. comm.)
CA-NB
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CA-NL
Nfld. and Labr. (Nfld.)
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CA-NS
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CA-ON
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CA-QC
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US-CT
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US-DE
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US-DC
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US-GA
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US-IL
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US-IN
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US-IA
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US-KS
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US-KY
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US-ME
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US-MD
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US-MA
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US-MI
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US-MN
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US-MS
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US-NJ
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US-NY
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US-NC
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US-OH
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US-PA
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US-SC
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US-TN
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US-VT
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US-VA
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US-WV
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US-WI
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10–600+ m
10 meter
600 meter
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Stems (usually reddish) erect, hairy.
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petioles 0–1.2 cm (ciliate);
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blades (3-nerved from bases) lanceolate to lanceovate, 7–20 × 1.2–3.5 cm, bases cuneate, margins serrulate to subentire (± flat), abaxial faces scabrous or ± hirsute, sometimes glanddotted.
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Peduncles 8–12 mm.
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Involucres hemispheric, 10–24 mm diam.
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Phyllaries 20–25 (loose or spreading), linear, 8–15 × 1.2–2 mm, (margins usually ciliate) apices acute to attenuate, abaxial faces sparsely strigose, not glanddotted.
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Paleae 7–9 mm, entire or ± 3-toothed (apices acute, hairy).
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Ray-florets 12–20;
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laminae (often pale-yellow) 15–25 mm (abaxial faces not glanddotted).
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Disc-florets 60+;
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corollas 5–6 mm, lobes yellow;
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anthers dark-brown or black, appendages dark.
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Cypselae 3–4 mm, glabrate;
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pappi of 2 aristate scales 2.4–3 mm. 2n = 34.
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