Silybum Adanson (Q3046)

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Silybum is a taxon with the rank genus within the tribe Cardueae
Language Label Description Also known as
English
Silybum Adanson
Silybum is a taxon with the rank genus within the tribe Cardueae

    Statements

    taxon/id/Silybum Adanson
    0 references
    Silybum Adanson
    Silybum
    Adanson
    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
    Milk thistle (English)
    Mediterranean region
    Annuals or biennials, taprooted, 15–300 cm, herbage glabrous, puberulent, or slightly tomentose, spiny.
    Stems erect, usually simple.
    petiolate (basal and proximal cauline) or sessile (distal cauline);
    blades adaxially variegated, margins dentate and often coarsely pinnately lobed, teeth and lobes spine-tipped, glabrous or puberulent.
    Heads discoid, borne singly, terminal and in distal axils.
    (Peduncles with reduced leaflike bracts.) Involucres ovoid to spheric, 15–60 mm diam.
    Phyllaries many in 4–6 series, unequal, outer and mid with appressed bases and spreading, lanceolate to ovate, spiny-fringed, terminal appendages, at least mid spine-tipped, innermost with erect, flat, entire, spineless apices.
    Receptacles flat, epaleate, covered with whitish bristles.
    Florets 25–100+;
    corollas pink to purple, tubes slender, distally bent, abruptly expanded into short throats, lobes linear;
    stamen filaments connate, anther bases sharply short-tailed, anther appendages oblong;
    style-branches: fused portions with slightly swollen subterminal nodes, distally cylindric, distinct portions minute.
    Cypselae ovoid, slightly compressed, not ribbed, apices with smooth, entire rims, glabrous, basal attachment scars slightly angled;
    pappi falling in rings, outer of many minutely barbed, basally connate, subulate scales, inner of minute smooth bristles.