Cirsium helenioides (Linnaeus) Hill (Q3016)

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Cirsium helenioides is a taxon with the rank species within the genus Cirsium
Language Label Description Also known as
English
Cirsium helenioides (Linnaeus) Hill
Cirsium helenioides is a taxon with the rank species within the genus Cirsium

    Statements

    taxon/id/Cirsium helenioides (Linnaeus) Hill
    0 references
    Cirsium helenioides (Linnaeus) Hill
    Cirsium helenioides
    (Linnaeus) Hill
    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
    circe fausse hélénie (French)
    melancholy thistle (English)
    Melancholy thistle (English)
    Greenland, GL
    1 reference
    Böcher, T.W., B. Fredskild, K. Holmen & K. Jakobsen. 1978. Grønlands Flora. P. Haase & Søns Forlag, København. 326 pp.
    Greenland
    Iceland
    Europe
    Flowering summer (Jul–Aug).
    Stems single, erect, ± arachnoid-tomentose;
    branches 0 or few, ascending.
    Leaves oblong to broadly lanceolate, 20–40 × 4–8 cm, finely spinulose-dentate or proximal cauline pinnatifid, lobes undivided, finely spinulose-dentate, main spines 1–2 mm, abaxial faces white-tomentose (with non-septate trichomes), adaxial glabrous;
    basal present at flowering, petiolate, bases tapered;
    cauline sessile, reduced distally, bases clasping, not decurrent;
    distal (few, well separated), oblong or linear, the uppermost reduced to linear bracts.
    Heads borne singly or less commonly 2–5 in terminal clusters.
    Peduncles 2–10 (–30) cm (elevated above distal leaves).
    Involucres broadly ovoid, 2–3 × 2–3.5 cm, glabrous or loosely arachnoid.
    Phyllaries in 8–10 series, imbricate, green, ovate or lanceolate (outer) to linear-lanceolate (inner), abaxial faces with a prominent elongate glutinous ridge, outer and middle tightly appressed, margins entire, apices with ascending, weak spines 0–1 mm;
    apices of inner phyllaries attenuate, flat.
    Corollas red-purple, 25–30 mm, tubes 10–23 mm, throats 8–14 mm (noticeably wider than tubes), lobes 7–10 mm;
    style tips 4–5 mm.
    Cypselae light-brown, 3–5 mm, bodies and apical collars concolorous;
    pappi 20–30 mm. 2n = 34.