Eutrochium Rafinesque (Q2601)
Eutrochium is a taxon with the rank genus within the tribe Eupatorieae
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Eutrochium Rafinesque
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Eutrochium is a taxon with the rank genus within the tribe Eupatorieae
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Statements
taxon/id/Eutrochium Rafinesque
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Eutrochium Rafinesque
Eutrochium
Rafinesque
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 (sometimes ± purple, sometimes glaucous, internodes usually shorter than leaves) erect, unbranched.
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Leaves mostly cauline;
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blades pinnately veined or ± 3-nerved from at or near bases, deltate-ovate, lance-elliptic, lanceolate, lanceovate, or ovate (bases gradually or abruptly tapered), margins serrate (usually with gland at apex of each tooth, apices acuminate), abaxial faces usually glanddotted and hirsute, puberulent, pubescent, scabrous, or stipitate-glandular, sometimes glabrate, adaxial faces mostly puberulent to scabrous-hirsute and glabrescent, sometimes glabrate or glabrous.
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Heads discoid, in (flat-topped or convex to rounded) compound, corymbiform arrays.
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Involucres cylindric, 2.5–7 mm diam.
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Phyllaries persistent, 10–22 in 5–6 series, (pale-pink to purple, rarely white, tightly appressed) striate or 1-nerved, mostly lanceovate to lanceolate, unequal (outer 2–3 obtuse, densely pubescent or glabrescent, often glanddotted, innermost glabrous or glabrescent).
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Receptacles flat or convex, epaleate.
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corollas usually purplish or pinkish, rarely white, throats funnelform, lobes 5, ovate to deltate;
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styles: bases enlarged, puberulent, branches ± filiform to clavate (slightly dilated or flattened distally, papillose).
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Cypselae (dark-brown to black or yellowish-brown) prismatic, 5-ribbed, usually glanddotted, sometimes scabrellous on ribs;
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pappi persistent, of 25–40 (cream to pinkish purple) barbellate bristles in 1 series.
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mostly puberulent
scabrous-hirsute
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scabrellous
usually; sometimes
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