Veronica hederifolia

Scientific Name Veronica hederifolia L.
Common Names English: Ivy-leaved speedwell; German: Efeublättriger Ehrenpreis, Ehrenpreis; French: Véronique à feuilles de lierre, véronique
Description Hibernating, annual or hardy-annual seed weed with creeping growth and taproot, branched, light-demanding, up to 20 cm (7.87 inch) long.

Descriptions

Characteristic Features

Ivy-leaved true leaves, small blue flowers, low growth.

Young Plant

Stems weak, prostrate to ascending, 5-40 cm (1.97 - 15.75 inch) long, branched at the base, spreading-hairy.

Cotyledons

Long-petiolated, haired oval, notched at apex.

Stems

Prostrate, branched at the base, hairy.

Leaves

Suborbicular, obcordate, 3-7 lobed with a broader terminal lobe.
Hairy, little lobed first true leaves.

Propagatio Organs

Flowers

Small, solitary in leaf-axils, lilac or blue, on long stalks. Calyx 4-lobed.

Flowering Period

Early spring.

Fruit

Capsule, flattened perpendicular to septum, generally obcordate, plump, wider than long, scarcely notched at the tip, smooth.
Seeds 1 or 2 per chamber, cup-shaped, cross-wrinkled.

Seeds

Germination in early spring and autumn.
Seeds are rounded, deeply lobed, soft yellow-brown, long-petiolated, haired oval, notched at apex.
V. hederifolia responds to a brief cold period before germination (cold-germinator), and needs a flat seed bed for germination.

Viability Of Seeds

More than 10 years.

Propagation

By seeds.
200-300 seeds /plant.

Occurrence

Habitat

Cultivated ground.

Soil

Aerated, nutritive sand and loam soils.

Additional Crop Information

Also brushes and waysides.

Agricultural Importance

Veronica hederifolia requires sufficient open space for establishment during emergence and tillering of winter cereals and during youth development of row crops. It competes for nutrients and significant yield loss only occurs at densities higher than 25 plants/m² (2.3/sq. ft.).

Control

Integrated Crop Management

Mechanical weed control at early growth stages results in good control of this weed.

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