Grindelia squarrosa (Pursh) Dunal (Q2255)

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Grindelia squarrosa is a taxon with the rank species within the genus Grindelia
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English
Grindelia squarrosa (Pursh) Dunal
Grindelia squarrosa is a taxon with the rank species within the genus Grindelia

    Statements

    taxon/id/Grindelia squarrosa (Pursh) Dunal
    0 references
    Grindelia squarrosa (Pursh) Dunal
    Grindelia squarrosa
    (Pursh) Dunal
    FNA Editorial Committee. 2006. Flora of North America north of Mexico. Volume 20: Magnoliophyta: Asteridae, part 7: Asteraceae, part 2. Oxford University Press, New York.
    accepted
    curly-cup gumweed (English)
    herbe à gomme commune (French)
    Flowering Jul–Sep(–Oct).
    plains
    roadsides
    streams
    subalkaline soils
    (10–)200–2900 m
    Mexico (Chihuahua)
    in Asia (Ukraine)
    Biennials, perennials, or subshrubs (perhaps flowering first-year, usually short-lived), (10–) 40–100 cm.
    Stems erect, usually whitish or stramineous, sometimes reddish or grayish, glabrous.
    Cauline leaf-blades oval, ovate, obovate, or oblong to spatulate, oblanceolate, lanceolate, or linear, (10–) 15–70 mm, lengths 2–5 (–10) times widths, bases ± clasping, margins usually crenate to serrate (teeth mostly 3–6+ per cm, rounded to obtuse, resin-tipped), rarely entire, apices obtuse to acute, faces glabrous, strongly gland-dotted.
    Heads usually in open to crowded, corymbiform arrays, rarely borne singly.
    Involucres broadly urceolate to hemispheric or globose, 6–11 × 8–20+ mm.
    Phyllaries in 5–6 series, reflexed to spreading or appressed, filiform or linear to lance-linear or lance-subulate, apices usually looped to hooked, sometimes recurved to nearly straight, subterete to subulate, moderately to strongly resinous.
    Ray-florets 0 or (12–) 24–36 (–40);
    laminae 8–14 mm.
    Cypselae whitish, stramineous, brown, or gray, 1.5–4.5 mm, apices smooth, coronate, or knobby, faces smooth, striate, or ± furrowed;
    pappi of 2–3 (–8), straight or contorted to curled, smooth or barbellulate to barbellate, subulate scales or setiform awns 2.5–5.5 mm, shorter than disc corollas.