Phalaris paradoxa

Scientific Name Phalaris paradoxa
Common Names English: Hood canarygrass; German: Seltsames Glanzgras; French: Alpiste paradoxal; Spanish: Alpiste
Description Annual grass.

Descriptions

Characteristic Features

Glumes with marked teeth, panicle 4-5 cm (1.57 - 1.97 inch) long, 1-1.5 cm (0.39 - 0.59 inch) wide.

Young Plant

Plant tufted, leaves with a flat blade, youngest leaf rolled, abundant tillering with numerous forks arising from nodes.

Stems

30-120 cm (11.81 - 47.24 inch) high, stem spreading then ascending.

Leaves

Membranous and truncate ligule.
With auricles.
Leaf-sheath open.
Upper leaves have a swollen leaf-sheath which envelopes the inflorescence before flowering.

Propagatio Organs

Flowers

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

Flowering Period

Early summer.

Fruit

Caryopsis, 2.5 mm (0.098 inch) long.

Seeds

Germination in autumn and winter.

Viability Of Seeds

Short lived seed bank.

Propagation

By seeds.
Persistent seed bank, emerging from shallow depths (< 3 cm, 1.18 inch) depth in the soil.

Occurrence

Habitat

P. paradoxa is an aggressive annual grass weed of many crops in moderate and warm areas (Mediterranean basin, Asia, Australia, Mexico, Southern States of the USA, Southern Europe, East Europe).

Soil

Hood canarygrass prefers alluvial, sandy-clay or clay texture soils with high soil moisture.

Additional Crop Information

Cereals (summer and winter annual).

Agricultural Importance

P. paradoxa is frequency increasing in crops.

Control

Integrated Crop Management

Crop competition and high density sowing may reduce P. paradoxa.

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