Cirsium drummondii Torrey & A. Gray (Q3013)

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Cirsium drummondii is a taxon with the rank species within the genus Cirsium
Language Label Description Also known as
English
Cirsium drummondii Torrey & A. Gray
Cirsium drummondii is a taxon with the rank species within the genus Cirsium

    Statements

    taxon/id/Cirsium drummondii Torrey & A. Gray
    0 references
    Cirsium drummondii Torrey & A. Gray
    Cirsium drummondii
    Torrey & A. Gray
    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
    chardon de Drummond (French)
    Drummond's thistle (English)
    dwarf thistle (English)
    short-stemmed thistle (English)
    Drummond’s or dwarf or short-stemmed thistle (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
    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 summer (Jun–Aug).
    dry to moist soil
    prairies
    pastures
    meadows
    forest edges
    woodland openings
    roadsides
    Stems erect, stout, fleshy, leafy, simple or distally branched, villous or tomentose with long, septate trichomes;
    branches usually short, stout, ascending.
    Leaves: blades oblongelliptic to oblanceolate, 15–30+ × 3–7 cm, usually shallowly to deeply pinnatifid, lobes ovate to broadly triangular, spreading, usually separated by broad U-shaped sinuses, spinose-dentate or coarsely lobed, main spines 2–5 (–8) mm, slender, abaxial faces villous with septate trichomes, at least along veins, sometimes thinly arachnoid, adaxial villous with septate trichomes;
    basal often present at flowering, spiny winged-petiolate;
    principal cauline winged-petiolate or sessile, not much reduced distally;
    distal reduced, similar to proximal, crowded around heads.
    Heads 1–5 (–9), borne singly or crowded in corymbiform arrays at tips of main-stems, often closely subtended and overtopped by 1–several distal leaves.
    Peduncles 0–5 (–10) cm, leafy-bracted.
    Involucres broadly ovoid to hemispheric, 3.5–5 × 3.5–5 cm (appearing much wider and ± campanulate in pressed specimens), loosely arachnoid on phyllary margins or glabrate.
    Phyllaries in 4–6 series, strongly imbricate, ovate or broadly lanceolate (outer) to lance-linear (inner), abaxial faces with ± narrow glutinous ridge;
    outer and mid appressed, spines erect to ascending, 2–3 mm;
    apices of mid and inner narrowed and scabrid-denticulate, innermost spineless, with expanded, flexuous, erose-denticulate tips.
    Corollas purple (white), 30–48 mm, tubes 17–30 mm, throats 6.5–11 mm, lobes 5–7 mm;
    style tips 5–7 mm.
    Cypselae stramineous to light-brown, 3.5–5.5 mm, apical collar yellow, narrow;
    pappi 30–42 mm.