SINCE 1828
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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