Cirsium undulatum (Nuttall) Sprengel (Q3021)
Cirsium undulatum is a taxon with the rank species within the genus Cirsium
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Cirsium undulatum (Nuttall) Sprengel
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Cirsium undulatum is a taxon with the rank species within the genus Cirsium
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Statements
taxon/id/Cirsium undulatum (Nuttall) Sprengel
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Cirsium undulatum (Nuttall) Sprengel
Cirsium undulatum
(Nuttall) Sprengel
FNA Editorial Committee. 2006. Flora of North America north of Mexico. Volume 19: Magnoliophyta: Asteridae, part 6: Asteraceae, part 1. Oxford University Press, New York.
accepted
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CA-BC
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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/
CA-AB
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Moss, E.H. 1983. Flora of Alberta. 2nd edition, revised by J.G. Packer. University of Toronto Press, Toronto. 687 pp.
CA-SK
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Harms, V.L. 2006. Annotated catalogue of Saskatchewan vascular plants. http://www.biodiversity.sk.ca/Docs/AnnotatedCatalogueSKVascPlants2006.pdf
CA-MB
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Manitoba Checklist, 2002
CA-AB
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CA-BC
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CA-MB
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CA-SK
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US-AZ
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US-CA
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US-CO
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US-GA
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US-ID
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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-MI
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US-MN
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US-MO
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US-MT
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US-NE
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US-NM
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US-ND
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US-OK
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US-OR
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US-PA
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US-SD
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US-TX
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US-UT
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US-WA
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US-WI
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US-WY
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100–2800 m
100 meter
2,800 meter
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deeply seated runner roots that produce adventitious-buds.
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Stems 1–several, erect or ascending, densely gray-tomentose;
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branches 0–few, usually above middle, ascending.
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Leaves: blades elliptic to oblong or ovate, 10–40 × 1–10 cm, margins strongly undulate, coarsely dentate or shallowly to deeply lobed, lobes ascending to spreading, ± triangular, well separated to closely spaced, spinulose and coarsely dentate or usually cleft into 2–3 lanceolate to triangular, often entire-margined, spine-tipped divisions, main spines (yellowish), 2–12+ mm, abaxial densely gray-tomentose, adaxial faces thinly tomentose;
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basal sometimes present at flowering, winged-petiolate;
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principal cauline becoming sessile and progressively reduced distally, widest at base, bases ± auriculate-clasping to short-decurrent;
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distal reduced, spinier.
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Heads 1–10+, terminal on branches, in leafy, ± corymbiform arrays.
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Peduncles 0–25+ cm.
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Involucres ovoid to hemispheric or broadly campanulate, 2.5–4.5 × 1.5–4.5 cm, loosely arachnoid on phyllary margins or glabrate.
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Phyllaries in 8–12 series, imbricate, ovate to lanceolate (outer) to linear-lanceolate (inner), abaxial faces with prominent glutinous ridge;
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outer and middle appressed, spines spreading, 1.5–5 mm;
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apices of inner narrow, often flexuous, flat, ± entire, spineless or weakly spiny.
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Corollas lavender to pink, purple, or white, 24–50 mm, tubes 12–28 mm, throats 6–14 mm, lobes 6.5–13 mm;
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style tips 5–7.5 mm.
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Cypselae light to dark-brown, 6–7 mm, bodies and apical collars concolorous, narrow;
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coarsely dentate or
shallowly deeply lobed
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reduced
progressively; distally
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less auriculate-clasping
short-decurrent
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hemispheric or broadly campanulate
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