Detailed view

© Botanic Garden Bln GFDL
© GFDL
© K. Stueber GFDL
Print page

Rudbeckia laciniata

Identity

Common name: Cutleaf coneflower
Synonyms: Rudbeckia digitata, Rudbeckia quinata
Origin: North America
Plant type: Herbaceous
Life cycle: Perennial
Code of conduct: Annex II
Invasive status (ISEIA protocol): Watch list
Main ornemental function: Mixed border

Description

Rhizomatous perennial herb up to 2.5 m tall. Stems and leaves usually glabrous or with sparse short hairs. Ovate leaves, divided in 3 to 5 lobes, irregulalry serrate. Flowers gathered in solitary capitula with yellow ray florets and greenish-brown disc florets.

Spread

Medium dispersal capacities. The plant reproduces sexually, but seeds may only germinate from bare soils. The low germination and recruitment rates in undisturbed sites reduce plant capacity to colonise natural plant communities. The species also reproduces vegetatively by rhizomes which may be transported over long distances by rivers.

Habitat

The plant mostly grows in open ruderal and alluvial habitats (e.g. riverbanks, wetlands). It prefers wet and nutrient-rich soils

Impact

Species classified B1 in Belgium. Mentionned as highly invasive in Austria and Hungrary. Listed as invasive in Switzerland. In open habitats with a low vegetation cover, R. laciniata is very competitive and forms dense monospecific populations from rhizomes. Plant height may reach 2.5 meters. It locally decreases plant species richness and hinders colonisation of open habitats by tree species. But its impact is lower on natural habitats covered by vegetation. The plant is toxic for livestock but also very melliferous. For more information, click here

Recommendation

Avoid planting this species near riverbanks and wet habitats, especially in the vicinity of protected areas (natural reserves, Natura 2000 sites, etc.).

Possible native alternative

Main ornemental function

Mixed border

[ Back ]