Phalaris paradoxa

Unité de Malherbologie & Agronomie
Weed Science & Agronomy
INRA-Dijon

Bayer Code : phapa

Synonym(s) of Sc. name:

Classification: Gramineae, Monocotyledonous

Common name: awned canary-grass

Synonym(s) of Common name:

Name per country: ES : alpiste vanillo ; FR : alpiste paradoxal ; IT : scagliola sterile ; PT : alpista ; EN : awned canary-grass ;

Biological type: Annual

Seed:

Seedling:

- Shoot rolled, leaf sheath terete.

- Leaf blade 20-50 times longer than broad, leaf glabrous.

- Ligule membranous, acute or toothed, leaf blade undulate at the base.

Adult plant:

- Height: 20-120 cm. Plant tufted.

- Stem spreading then ascending. Abundant tillering with numerous forks arising from nodes.

- Leaves with tendrils, long and narrow (8-11 cm x 04 cm), somewhat rough. Leaf blade with marked veins, hairy, light-green.

- Inflorescence spike -like, narrowed at both ends; usually and partly enclosed in the leaf sheath. Seeds 6-7 in flattened spikelet.

- Frequency increasing in crops. Populations exist which are resistant to triazines in Israel.

- Risk of confusion at seedling stage with the other species of Phalaris .

- Biological type: annual.

Mistake with: Phalaris

Ecological profile (click on flags): Present Present Rare Present Present