Difference between revisions of "Cirsium helenioides (Linnaeus) Hill (Q3016)"
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Latest revision as of 12:47, 24 June 2022
Cirsium helenioides is a taxon with the rank species within the genus Cirsium
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Cirsium helenioides (Linnaeus) Hill
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Cirsium helenioides is a taxon with the rank species within the genus Cirsium
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Statements
taxon/id/Cirsium helenioides (Linnaeus) Hill
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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
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Greenland, GL
present
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Böcher, T.W., B. Fredskild, K. Holmen & K. Jakobsen. 1978. Grønlands Flora. P. Haase & Søns Forlag, København. 326 pp.
Stems single, erect, ± arachnoid-tomentose;
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branches 0 or few, ascending.
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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;
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basal present at flowering, petiolate, bases tapered;
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cauline sessile, reduced distally, bases clasping, not decurrent;
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distal (few, well separated), oblong or linear, the uppermost reduced to linear bracts.
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Heads borne singly or less commonly 2–5 in terminal clusters.
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Peduncles 2–10 (–30) cm (elevated above distal leaves).
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Involucres broadly ovoid, 2–3 × 2–3.5 cm, glabrous or loosely arachnoid.
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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;
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apices of inner phyllaries attenuate, flat.
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Corollas red-purple, 25–30 mm, tubes 10–23 mm, throats 8–14 mm (noticeably wider than tubes), lobes 7–10 mm;
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style tips 4–5 mm.
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Cypselae light-brown, 3–5 mm, bodies and apical collars concolorous;
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pappi 20–30 mm. 2n = 34.
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arachnoid-tomentose
more or less
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