SafePlants

Rough Hawksbeard (Crepis biennis)

Rough Hawksbeard, scientifically known as Crepis biennis, is a flowering plant belonging to the Daisy Family (Compositae, subfamily Cichorioideae, formerly Chicory Family). It is also sometimes written as Rough Hawk's-beard.

Taxonomy and Nomenclature

• Scientific Name: Crepis biennis
• Common Names: Rough Hawksbeard, Rough Hawk's-beard
• Family: Daisy Family (Compositae, subfamily Cichorioideae, formerly Chicory Family)
• Synonyms: The text mentions translating "Rough hawksbeard hawk's beard crepis setosa syn aegoseris setosa apargia setosa barkhausia setosa crepidium asperum hieracioides setosum" implying these may be synonyms or related terms.

Distribution and Habitat

• Rough Hawksbeard is native to Europe and Asia Minor.
• It has also naturalized in North America, with a range extending from New England to Pennsylvania, westward.
• The text mentions it growing at the base of a concrete wall on a farm in Powys, Wales.

Ecological Role

• Rough Hawksbeard is noted as an invasive species. This implies it can spread aggressively and potentially displace native plants in certain environments.

Morphological Characteristics and Growth Habits

• Crepis biennis is a biennial plant.
• It propagates by seeds.
• It is one of several tall yellow composites that can easily be confused with other similar species.
• The text mentions it is difficult to differentiate between this and smooth / beaked Hawksbeard.

Interactions with Other Organisms

• The text mentions a green bug observed on Rough Hawksbeard.
• It is noted as a plant that small tortoiseshell butterflies visit.
• It is also shown flowering in a field with Field poppies.

Further Information

• Encyclopedia of Life provides articles about Crepis biennis.
• Images are available from Pixabay.
• Stock photos are available from Shutterstock and iStock.
• Wikimedia Commons contains media related to Crepis biennis.