Eutrochium Rafinesque (Q2601)

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Eutrochium is a taxon with the rank genus within the tribe Eupatorieae
Language Label Description Also known as
English
Eutrochium Rafinesque
Eutrochium is a taxon with the rank genus within the tribe Eupatorieae

    Statements

    taxon/id/Eutrochium Rafinesque
    0 references
    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
    Joepyeweed (English)
    eupatoire (English)
    North America
    Stems (sometimes ± purple, sometimes glaucous, internodes usually shorter than leaves) erect, unbranched.
    Leaves mostly cauline;
    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.
    Heads discoid, in (flat-topped or convex to rounded) compound, corymbiform arrays.
    Involucres cylindric, 2.5–7 mm diam.
    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).
    Receptacles flat or convex, epaleate.
    corollas usually purplish or pinkish, rarely white, throats funnelform, lobes 5, ovate to deltate;
    styles: bases enlarged, puberulent, branches ± filiform to clavate (slightly dilated or flattened distally, papillose).
    Cypselae (dark-brown to black or yellowish-brown) prismatic, 5-ribbed, usually glanddotted, sometimes scabrellous on ribs;
    pappi persistent, of 25–40 (cream to pinkish purple) barbellate bristles in 1 series.