Eupatorium Linnaeus (Q2596)
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Eupatorium is a taxon with the rank genus within the tribe Eupatorieae
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Eupatorium Linnaeus
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Eupatorium is a taxon with the rank genus within the tribe Eupatorieae
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Statements
taxon/id/Eupatorium Linnaeus
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Eupatorium Linnaeus
Eupatorium
Linnaeus
FNA Editorial Committee. 2006. Flora of North America north of Mexico. Volume 21: Magnoliophyta: Asteridae, part 8: Asteraceae, part 3. Oxford University Press, New York.
accepted
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Stems erect, usually not branched proximal to arrays of heads (from caudices or rhizomes).
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Leaves mostly cauline;
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petiolate or sessile;
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blades usually 3-nerved from or distal to bases, or pinnately nerved, mostly deltate or ovate to lanceolate or linear (and intermediate shapes, sometimes elliptic, oblong, rhombic, or suborbiculate, sometimes pinnatifid, 1–2-pinnately, ternately, or palmately lobed), ultimate margins entire or toothed, faces glabrous or puberulent, pubescent, scabrous, or setulose, usually glanddotted.
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Heads discoid, in corymbiform or diffuse to dense, paniculiform arrays.
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Involucres obconic to ellipsoid, 1–3 (–5+) mm diam.
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Phyllaries persistent, 7–15+ in 2–3 (–4+) series, (usually green) 2–3-nerved, or not notably nerved, or pinnately nerved, elliptic, lanceolate, oblong, or obovate, usually unequal, sometimes ± equal (margins scarious, hyaline, apices rounded to acute or acuminate sometimes mucronate, faces usually puberulent or villous, usually glanddotted, rarely glabrous).
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Receptacles flat or convex, epaleate.
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Florets (3–) 5 (–15+);
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corollas usually white, rarely pinkish, throats funnelform to campanulate, lobes 5, triangular;
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styles: bases sometimes enlarged, usually puberulent (glabrous in E. capillifolium), branches mostly filiform.
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Cypselae (brownish to black) prismatic, 5-ribbed, usually glabrous, usually glanddotted;
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pappi persistent, of 20–50 (whitish) barbellulate bristles in 1 series.
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