Perennial herb to 60 cm tall with leafy stolons above and below ground. Leaves elliptic to oblanceolate, to 20 cm long, to 5 cm wide, margins more or less entire, hairy. Capitula in dense clusters, to 2.5 cm across; summer. Florets orange to orange-red. [Hieracium aurantiacum L.]
Europe
P. officinarum F.W. Schultz & Sch. Bip. from Europe and Asia is a stoloniferous perennial herb with rosettes of more or less entire hairy leaves, solitary capitula on long stalks and lemon-yellow florets. [Hieracium pilosella L.]
Source: (2002). Dahlia. In: . Horticultural Flora of South-eastern Australia. Volume 4. Flowering plants. Dicotyledons. Part 3. The identification of garden and cultivated plants. University of New South Wales Press.