Weed Science & Agronomy
INRA-Dijon
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Unité de Malherbologie & Agronomie Weed Science & Agronomy INRA-Dijon |
Bayer Code : erifl
Synonym(s) of Sc. name: Conyza altisssima Bonnet, Conyza nandini Bonnet, Conyza albida Willdenow ex Sprengel
Classification: Compositae, Dicotyledonous
Common name: guernsey Fleabane
Synonym(s) of Common name:
Name per country: DE : Weißliches Berufskraut ; ES : coniza ; FR : vergerette blanchâtre ; IT : saeppola di Naudin ; PT : avoadinha-marfim ; EN : guernsey Fleabane ;
Biological type: Annual, Biennial
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- Cotyledons elongate, spoonlike, glabrous.
- Leaves entire, elliptical or ovate, margin entire.
- Height: 30-200cm. Plant pubescent, hispid.
- Stem strong, erect sometimes branched from the base. Stem hairy, grooved, very foliate.
- Basal leaves in rosette, entire,stalked, ovate-elliptical, dentate. Upper leaves first elliptic- dentate, then lanceolate - dentate nearly lobed, narrowing in a leafy stalk, white hairs short or long. Stem leaves alternate and pubescent.
- Flowers white (sometimes pink) in heads, ray -florets no longer than the disk-florets, less than 1 mm long. Upper head 1 cm in diameter and gathering 50-100 flowers.
- Fruits : achenes with a reddish pappus.
- Spreading in crops. Paraquat resistant populations in Japan.
- Risk of confusion with Conyza canadensis .
- Biological type: annual or biennial.
Mistake with: Conyza canadensis
Ecological profile (click on flags):
Present
Present
Present
