Cirsium discolor (Muhlenberg ex Willdenow) Sprengel (Q3012)

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Cirsium discolor is a taxon with the rank species within the genus Cirsium
Language Label Description Also known as
English
Cirsium discolor (Muhlenberg ex Willdenow) Sprengel
Cirsium discolor is a taxon with the rank species within the genus Cirsium

    Statements

    taxon/id/Cirsium discolor (Muhlenberg ex Willdenow) Sprengel
    0 references
    Cirsium discolor (Muhlenberg ex Willdenow) Sprengel
    Cirsium discolor
    (Muhlenberg ex Willdenow) 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
    (Muhlenberg ex Willdenow) Sprengel
    chardon discolore (French)
    circe discolore (French)
    field thistle (English)
    pasture thistle (English)
    Field thistle (English)
    chardon discolore (English)
    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
    Catling, P.M., D.S. Erskine & R.B. MacLaren. 1985. The Plants of Prince Edward Island with new records, nomenclatural changes, and corrections and deletions. Agriculture Canada, Research Branch, Ottawa. Publication 1798. 272 pp.
    Flowering summer–fall (Jun–Oct).
    tallgrass prairies
    deciduous woodlands
    forest openings
    disturbed sites
    damp soil
    taproots and often cluster of coarse fibrous-roots, roots without tuberlike enlargements.
    Stems single, erect, villous with septate trichomes, sometimes ± glabrate, distally ± tomentose;
    branches few–many, ascending.
    Leaves: blades oblanceolate to elliptic or ovate, 10–25 (–50) × 1–13 (–25) cm, usually deeply divided more than halfway to midveins, proximal sometimes undivided, lobes linear-lanceolate, margins revolute, ascending, entire or spinulose to remotely few toothed or sharply lobed, main spines 1–5 mm, abaxial faces white-tomentose, adaxial faces green, villous with septate trichomes or glabrate;
    basal usually absent at flowering, winged-petiolate, bases tapered;
    principal cauline well distributed, gradually reduced, bases narrowed, sometimes weakly clasping, not decurrent;
    distal cauline well developed.
    Heads 1–many in corymbiform or paniculiform arrays.
    Peduncles 0–5 cm (not overtopped by crowded distal cauline leaves).
    Involucres ovoid to broadly cylindric or campanulate, 2–3.5 (–4) × 1.5–3 cm, thinly arachnoid.
    Phyllaries in 10–12 series, strongly imbricate, greenish with subapical darker central zone, ovate (outer) to lanceolate (inner), abaxial faces with narrow glutinous ridge, outer and middle bodies appressed, margins entire, spines abruptly spreading to deflexed, slender, 3–9 mm;
    spines slender, 3–9 mm;
    apices of inner phyllaries spreading, narrow, flattened, finely serrulate.
    Corollas pink to purple (white), 25–32 mm, tubes 12–16 mm, throats 7–10 mm, (noticeably wider than tubes), lobes 6–9 mm;
    style tips 4–6 mm.
    Cypselae tan to brownish, 4–5 mm, apical collars straw-colored, 0.5–75 mm;
    pappi 18–25 mm. 2n = 20, 21, 22.