Raphanus raphanistrum

Scientific Name Raphanus raphanistrum
Common Names English: Wild radish, jointed charlock; German: Acker-Rettich, Hederich; French: Raifort sauvage; Spanish: Rábano silvestre
Description Annual, seed-propagated weed with short taproot.

Descriptions

Characteristic Features

White-yellow flowers, sepals erect, and purple in color (mustard spreads out sepals perpendicularly to flower stalk!).

Cotyledons

Vigorous, broad, heart-shaped, tip very retracted, long-petiolate.

Stems

Erect, ramified, with spread-apart or downward-pointed hairs, up to 60 cm (23.62 inch) high.

Leaves

Lyre-shaped pinnatifid, both surfaces with ovate, irregularly dentate lobes, side lobes increasing in size toward the tip, end lobes very large.
Upper leaves lanceolate, not lobed.

Propagatio Organs

Flowers

Pale yellow or white, veined violet or dark yellow, in clusters of few blossoms.
Sepals erect, adjacent to the floral leaves.
The 4 petals are spread out diagonally forming a cross shaped corolla.
Raceme simple, elongated.
Indeterminate cluster with stalked flowers.

Flowering Period

Summer - autumn.

Fruit

Dry dehiscent pod-like fruit which is longer, often many times than broad, having the shape of an elongated pouch.

Seeds

Germination in spring.
Seed germination depth 1-2 cm (0.39 - 0.78 inch), shallow germinator.
Seeds are round to oval, yellowish to dark brown and dark.

Viability Of Seeds

> 16 years.

Propagation

By seeds.
100-300 seeds/plants.

Occurrence

Habitat

Weedy places in fields and roadsides. Also frequent in waste grounds and coastal areas.

Soil

Primarily on lesser, somewhat acidic, low lime soils.

Agricultural Importance

R. raphanistrum is a common weed worldwide, however, it is easy to control and is not a very strong competitor with infested crops.

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