Tanacetum Linnaeus (Q2113)

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Tanacetum is a taxon with the rank genus within the subtribe Anthemidinae
Language Label Description Also known as
English
Tanacetum Linnaeus
Tanacetum is a taxon with the rank genus within the subtribe Anthemidinae

    Statements

    taxon/id/Tanacetum Linnaeus
    0 references
    Tanacetum Linnaeus
    Tanacetum
    Linnaeus
    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
    Tansy (English)
    tanaisie (English)
    North America
    Europe
    n Africa
    some species widely cultivated
    Stems 1 or 2–5+, erect or prostrate to ascending, branched proximally and/or distally, glabrous or hairy (hairs basifixed and/or medifixed, sometimes stellate).
    petiolate or sessile;
    blades mostly obovate to spatulate, usually 1–3-pinnately lobed, ultimate margins entire, crenate, or dentate, faces glabrous or hairy.
    Heads usually radiate, sometimes disciform (or quasi-radiate or radiant), usually in lax to dense, corymbiform arrays, rarely borne singly.
    Involucres mostly hemispheric or broader, (3–) 5–22+ mm diam.
    Phyllaries persistent, (20–) 30–60+ in (2–) 3–5+ series, distinct, ± ovate to oblong or oblong to lanceolate or lance-linear (sometimes carinate), unequal, margins and apices (pale to dark-brown or blackish) scarious (tips sometimes dilated).
    Receptacles flat to conic or hemispheric (sometimes hairy), epaleate.
    Ray-florets usually 10–21+ (pistillate and fertile or neuter; corollas pale-yellow to yellow or white, usually with yellowish bases [pink], laminae oblong to flabellate), sometimes 0 (in disciform or quasi-radiate or radiant heads, peripheral pistillate florets 8–30+; corollas pale-yellow, ± zygomorphic, lobes 3–4, sometimes ± raylike).
    Disc-florets 60–300+, bisexual, fertile;
    corollas yellow, tubes ± cylindric, throats narrowly funnelform to campanulate, lobes (4–) 5, ± deltate.
    Cypselae obconic or ± columnar (circular in cross-section), ribs (4–) 5–10 (–12+), faces usually gland-dotted, sometimes glabrous (pericarps without myxogenic cells or resin sacs, embryo-sac development tetrasporic);
    x = 9 (polyploidy).