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© A. Monty
© A. Monty
© P. Brusselen
© P. Brusselen
© P. Brusselen

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Senecio inaequidens

Identity

Common name: South african ragwort
Synonyms: Senecio harveianus, Senecio vimineus
Origin: South Africa
Plant type: Herbaceous
Life cycle: Perennial
Code of conduct: Annex I (consensus list)
Invasive status (ISEIA protocol): Watch list
Main ornemental function: Mixed border

Description

Short-lived perennial herb (longevity between 5 to 10 years), up to 0.5 -1.2 m tall, woody at the base. Leaves alternate, glabrous, narrowly lanceolate-linear, margins crenulate. Yellow flowers gathered in capitula. Long flowering period (from May to December).

Spread

High dispersal capacities. The species reproduces by seeds. One individual can procuce up to 10 000 seeds, easily dispersed by wind, water or animals. No vegetative reproduction. Dispersal along roads is promoted by vehicules. S. inaequidens is not an ornemental plant. Accidental introduction from wool trade containing seeds of S. inaequidens.

Habitat

It colonises disturbed areas (ruderal sites, wastelands, roadsides, railways), rock outcrops, sand dunes. S. inaequidens prefers dry soils but can also grow on wet soils, calcarous or acidic.

Impact

Species classified B3 in Belgium. Included in the black list in Switzerland and in the watch list in Austria. Its distribution is increasing over Europe. The species is problematic in mediterranean region (France, Italy, Spain). Widepsread in Belgium, the environmental impact of S. inaequidens is moderate as the species colonises disturbed habitats of medium conservation value. Nevertheless, it can form dense populations. It produces allelopathic substances which inhibit the growth of other species. The plant is toxic. 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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