Synonym:  Hieracium floribundum  Wimm.  and  Grab.

              

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Perennials.  Sap is milky white.  Plants are rhizomatous and stoloniferous.  Stolons are often produced by flowering.  Stems are scapose, glaucous and sparsely pubescent, with 1 or 2 very small leaves.  Typical height is 60 to 80 cm.

Inflorescences are flat-topped, somewhat open.

Flower heads are ligulate.  All florets are bisexual and fertile.  Corollas are bright yellow.  Involucres are thinly covered with black, stalked glands, long bristles and minute stellate hairs.  Peduncles are relatively longer than those of P. caespitosa.

Basal and stolon leaves (persistent for most of the season, are oblanceolate to narrowly elliptic, glaucous, mostly glabrous on the upper surface and bristly on midribs of the lower surface.

Plants of fields, roadsides, open, disturbed ground.  Flowers May to June.  Not native.

[ Presumed to be a hybrid of P. caespitosa  and P. lactucella ]

 

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Similar species include P. caespitosa and P. piloselloides.

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For additional information on this and other hawkweed species, as well as a list of selected references, see my article, "Understanding Hawkweeds".

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