Cirsium pumilum (Nuttall) Sprengel (Q3027)

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Cirsium pumilum is a taxon with the rank species within the genus Cirsium
Language Label Description Also known as
English
Cirsium pumilum (Nuttall) Sprengel
Cirsium pumilum is a taxon with the rank species within the genus Cirsium

    Statements

    taxon/id/Cirsium pumilum (Nuttall) Sprengel
    0 references
    Cirsium pumilum (Nuttall) Sprengel
    Cirsium pumilum
    (Nuttall) Sprengel
    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
    pasture thistle (English)
    chardon nain (French)
    Pasture thistle (English)
    United States
    Stems erect, villous with septate trichomes and sometimes thinly arachnoid tomentose;
    branches 0–few, distal, ascending.
    Leaves: blades oblongelliptic, 5–30+ × 2–10 cm, ± undulate, shallowly to deeply pinnatifid, lobes ovate to broadly triangular, usually separated by broad sinuses, spinose-dentate or lobed, main spines 1.5–7 mm, slender to stout, abaxial faces villous with septate trichomes, at least along veins, sometimes thinly arachnoid, adaxial faces villous with septate trichomes and thinly arachnoid tomentose or subglabrous;
    basal often present at flowering, bases tapered;
    principal cauline sessile, moderately reduced distally, bases often auriculate-clasping;
    distal reduced, similar to proximal.
    Heads 1–few, borne singly at tips of main-stem and branches, often closely subtended by 1–several bracts.
    Peduncles 0–15+ cm (above distal leaves), leafy-bracted.
    (appearing much wider and hemispheric to campanulate in pressed specimens), loosely arachnoid on phyllary margins or glabrate.
    Phyllaries in 8–10 series, imbricate, ovate or lanceolate (outer) to lance-linear (inner), abaxial faces with ± prominent glutinous ridge, outer and middle appressed, apices ascending to spreading, spines 1.5–6 mm;
    apices of middle and inner narrowed and scabrid-denticulate, innermost spineless, tapered and entire or with expanded, erose-denticulate, flexuous tips.
    Corollas pink to purple (white), 40–60 mm, tubes 20–35 mm, throats 11–15 mm, lobes 7–10 mm;
    style tips 3–7 mm.
    Cypselae stramineous to brown, 3.5–5 mm, apical collars yellow or colored like body;
    pappi 35–45 mm. 2n = 30.