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Aster lanceolatus

Identity

Common name: Panicled Aster
Synonyms: A. paniculatus, A. salicifolius, A. recurvatus, A. simplex
Origin: North America
Plant type: Herbaceous
Life cycle: Perennial
Code of conduct: Annex I (consensus list)
Invasive status (ISEIA protocol): Black list
Main ornemental function: Mixed border

Description

This factsheet is common for 3 North American aster species relatively similar, all listed as invasive : Aster lanceolatus, A. novi-belgii, A. x salignus. Herbaceous plants up from 0,9 to 1,5 m tall with lance-like leaves to linear. A. lanceolatus can be distinguished from A. novi-belgii by the sessile leaves with rounded bases. The inflorescence is a capitula with a yellow disk surrounded by white rays. Flowering in autumn.

Spread

Medium spread potential. In Belgium, this plant only reproduces asexually by rhizomes. No viable seeds are observed in the wild, probably due to the late flowering of this plant.

Habitat

American asters colonise both ruderal areas (wastelands, railways, roadways, etc.) and wetlands (riverbanks, megaphorbs, alluvial forests, wet meadows, etc.), especially on rich soils.

Impact

Species classified A2 in Belgium. Widespread throughout Europe. North American asters are listed as invasive in several countries like France, Switzerland, Austria, Hungary. They can invade habitat of high conservation value like wetlands. Due to their strong vegetative development, North American asters can form dense and monospecific colonies displacing native plant species. In Belgium, only populations of Aster lanceolatus and A. x salignus are observed in natural habitats of ecological value, specially along riverbanks. For more information, click here

Recommendation

Do not plant, do not buy this species.

Possible native alternative

Main ornemental function

Mixed border

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