Eupatorium serotinum Michaux (Q2600)

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Eupatorium serotinum is a taxon with the rank species within the genus Eupatorium
Language Label Description Also known as
English
Eupatorium serotinum Michaux
Eupatorium serotinum is a taxon with the rank species within the genus Eupatorium

    Statements

    taxon/id/Eupatorium serotinum Michaux
    0 references
    Eupatorium serotinum Michaux
    Eupatorium serotinum
    Michaux
    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
    eupatoire tardive (French)
    late boneset (English)
    late-flowering thoroughwort (English)
    Lateflowering thoroughwort (English)
    1 reference
    Newmaster, S.G. & S. Ragupathy. 2005. Flora Ontario - Integrated Botanical Information System (FOIBIS), Phase I. University of Guelph, Canada. http://www.uoguelph.ca/foibis http://www.uoguelph.ca/foibis/
    Flowering Aug–Oct.
    open sites
    open sites
    roadsides
    Stems (from short caudices) single, sparsely to densely branched distally, pubescent throughout (sometimes reddish to purplish).
    petiolate (petioles 10–25 mm);
    blades ± 3-nerved, lanceolate, 20–90+ × 5–40 mm, bases rounded to slightly oblique, margins entire or serrate, apices acute, faces puberulent, glanddotted.
    Heads in corymbiform arrays.
    Phyllaries 8–12 in 1–2 series, elliptic to oblong, 1–3 × 0.5–1 mm, apices slightly rounded to acute, abaxial faces puberulent, glanddotted.
    Florets 9–15;
    corollas 2.5–3 mm.
    Cypselae 1–1.5 mm;
    pappi of 20–30 bristles 2–2.5 mm. 2n = 20.