hieracium

noun

hi·er·a·ci·um | \ ˌhīəˈrāshēəm\

Definition of hieracium

1 capitalized : a very large and nearly cosmopolitan genus of weedy perennial herbs (family Compositae) having simple often basal leaves and heads of yellow or reddish orange ray flowers — see orange hawkweed

2 plural hieracia or hieraciums : any plant of the genus Hieracium

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