Wiktionary
orange hawkweed
n. (taxlink Pilosella aurantiaca species noshow=1), a flowering plant of the family Asteraceae, native to alpine regions of central and southern Europe.
WordNet
orange hawkweed
n. European hawkweed having flower heads with bright orange-red rays; a troublesome weed especially as naturalized in northeastern North America; sometimes placed in genus Hieracium [syn: Pilosella aurantiaca, Hieracium aurantiacum]