Hieracium Linnaeus (Q3095)

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Hieracium is a taxon with the rank genus within the tribe Cichorieae
Language Label Description Also known as
English
Hieracium Linnaeus
Hieracium is a taxon with the rank genus within the tribe Cichorieae

    Statements

    taxon/id/Hieracium Linnaeus
    0 references
    Hieracium Linnaeus
    Hieracium
    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
    Hawkweed (English)
    épervière (English)
    North America
    Mexico
    Central America
    South America
    Europe
    Africa
    Stems usually 1, usually erect, usually branched distally, sometimes throughout, sometimes scapiform, glabrous or hairy (induments often complex, see discussion).
    petiolate or sessile;
    blades mostly elliptic, lanceolate, oblanceolate, oblong, or spatulate, margins entire, denticulate, or dentate [laciniate to pinnatifid] (faces glabrous or hairy, induments often complex, see discussion).
    Heads borne singly or in corymbiform, paniculiform, thyrsiform, umbelliform, or nearly racemiform arrays.
    Peduncles (terminal and axillary) not inflated, often bracteate.
    Calyculi 0 or of 3–13 (–16+), deltate to lanceolate or linear bractlets (in 1–2+ series; sometimes intergrading with phyllaries).
    Involucres hemispheric or campanulate to cylindric, 3–9 [–12+] mm diam.
    Phyllaries 5–21 (–40+) in 2+ series, lanceolate to linear, subequal to unequal (reflexed in fruit), margins usually little, if at all, scarious, apices obtuse to acute or acuminate.
    Receptacles flat, pitted, glabrous, epaleate.
    Florets 6–150+;
    corollas usually yellow, sometimes white or ochroleucous, sometimes tinged with cyan or red, rarely orange (then often drying scarlet or purplish).
    Cypselae usually redbrown or black (tan in H. horridum), usually ± columnar or prismatic, sometimes ± urceolate (slightly bulbous proximally and narrower distally) or nearly fusiform, not distinctly beaked, ribs (or grooves) usually 10, faces glabrous;
    pappi persistent (fragile), of 20–80+, distinct, white, sordid, stramineous, or rufous, ± equal or unequal, barbellulate bristles in 1–2+ series.