Difference between revisions of "Cirsium edule Nuttall (Q3025)"
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Latest revision as of 12:44, 24 June 2022
Cirsium edule is a taxon with the rank species within the genus Cirsium
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Cirsium edule Nuttall
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Cirsium edule is a taxon with the rank species within the genus Cirsium
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taxon/id/Cirsium edule Nuttall
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Cirsium edule Nuttall
Cirsium edule
Nuttall
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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US-AK
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US-OR
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US-WA
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Stems usually 1, erect, simple to openly branched in distal 1/2, ± villous with jointed trichomes, sometimes finely arachnoid, sometimes ± glabrate;
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branches 0–many, ascending.
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Leaves: blades oblong to elliptic or oblanceolate, 5–50 × 1–10 cm, plane to moderately undulate, coarsely dentate to deeply pinnatifid, lobes 5–10 well separated, linear, narrowly to broadly triangular, spinulose to spiny-dentate or shallowly lobed, main spines 3–10 mm, abaxial faces thinly to densely villous along major veins with septate trichomes, sometimes thinly arachnoid-tomentose, sometimes glabrescent, adaxial glabrous to sparsely villous or shaggy-tomentose along midveins with septate trichomes;
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basal often absent at flowering, spiny winged-petiolate or sessile;
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principal cauline well distributed, only gradually reduced, bases auriculate-clasping;
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distal moderately to strongly reduced, thin, often spinier than the proximal.
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Heads 1–many, erect, often crowded and ± sessile in tight clusters at stem tips, closely subtended by clusters of leafy bracts or not, collectively forming corymbiform or paniculiform arrays.
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Peduncles 0–5 (–30) cm.
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Involucres narrowly ovoid to hemispheric or campanulate, 1.5–3.5 × 1.5–4 cm (including spines), loosely to densely arachnoid with fine, non-septate trichomes.
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Phyllaries in 4–8 series, subequal, green or often purplish, bodies short, appressed, abaxial faces without glutinous ridge, apices stiffly radiating to ascending, straight or flexuous, narrowly linear, plane to acicular, spines straight, slender, 1–10+ mm;
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outermost spiny-fringed or entire, mid entire or minutely serrulate;
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apices of inner straight, sometimes expanded and erose, flat.
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Corollas purple (pink or white), (15–) 18–22 (–33) mm, tubes 7–11 mm, throats (4–) 5–8.5 (–13) mm, lobes linear but not filiform, not knobbed at tips, (2–) 4.5–7 (–10) mm;
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style tips 3–4 (–5) mm, conspicuously exserted beyond corolla lobes.
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Cypselae dark-brown, 3.5–6.5 mm, apical collars not differentiated;
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pappi 9–19 (–25) mm.
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glabrate
sometimes more or less
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elliptic or oblanceolate
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moderately undulate coarsely dentate
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moderately undulate coarsely dentate
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narrowly broadly triangular
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narrowly broadly triangular
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arachnoid-tomentose
sometimes thinly
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glabrous
sparsely villous or shaggy-tomentose
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reduced
moderately to strongly
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narrowly ovoid
hemispheric or campanulate
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