Hieracium Linnaeus (Q3095)
Hieracium is a taxon with the rank genus within the tribe Cichorieae
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Hieracium Linnaeus
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Hieracium is a taxon with the rank genus within the tribe Cichorieae
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Statements
taxon/id/Hieracium Linnaeus
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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
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Stems usually 1, usually erect, usually branched distally, sometimes throughout, sometimes scapiform, glabrous or hairy (induments often complex, see discussion).
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petiolate or sessile;
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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).
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Heads borne singly or in corymbiform, paniculiform, thyrsiform, umbelliform, or nearly racemiform arrays.
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Peduncles (terminal and axillary) not inflated, often bracteate.
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Calyculi 0 or of 3–13 (–16+), deltate to lanceolate or linear bractlets (in 1–2+ series; sometimes intergrading with phyllaries).
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Involucres hemispheric or campanulate to cylindric, 3–9 [–12+] mm diam.
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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.
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Receptacles flat, pitted, glabrous, epaleate.
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corollas usually yellow, sometimes white or ochroleucous, sometimes tinged with cyan or red, rarely orange (then often drying scarlet or purplish).
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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;
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pappi persistent (fragile), of 20–80+, distinct, white, sordid, stramineous, or rufous, ± equal or unequal, barbellulate bristles in 1–2+ series.
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scapiform
sometimes throughout; throughout; sometimes
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in corymbiform , paniculiform , thyrsiform , umbelliform or nearly racemiform , arrays
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of 3-13(-16+) , deltate to lanceolate or linear bractlets
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tinged with cyan or tinged with red
sometimes
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columnar
usually more or less
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urceolate
sometimes more or less
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