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Brassica rapa

Species category

Agricultural, Vegetable

Common name

field mustard

Diagnostic characters

Planting unit

True seedTrue seed:
A mature fertilized ovule consisting of an embryo, with or without and external food reserve (e.g., endosperm) enclosed by the testa.

Shape

Globose

Size

  • Length: 2 mm
  • Width: 2 mm
  • Thickness: 2 mm

Color

Reddish-bronze

Texture

Reticulum strong and with stipplesStipples:
Numerous small dots or specks.
.

Other structures

HilumHilum:
The scar on the seed coat at the place of its detachment from the seed stalk (funiculus).
 rises slightly above the seed surface.

Identification notes

Seeds are spherical. Reticulum well-developed. StipplesStipples:
Numerous small dots or specks.
 are present on the reticulum and in the interspaces. Color bronze to reddish.

Comments

Seed of this species is considered noxious only as a contaminant. Check individual states for interpretations.

Noxious weed seed categories

State Noxious Weed: Alabama, Arizona, Connecticut, Florida, Georgia, Illinois, Kansas, Louisiana, Maine, Massachusetts, Mississippi, Nebraska, New Hampshire, North Carolina, Oklahoma, Rhode Island, South Carolina, Tennessee, Texas, Virginia, Vermont

AOSA examination list

Included

More information

For more information, see ISMA fact sheet.

Nomenclature

Family

Brassicaceae

Valid name

Brassica rapa L.

Brassica rapa. Seeds with stipples present on the reticulum and in the interspaces. 
Brassica rapa. Seeds with stipples present on the reticulum and in the interspaces. 
Brassica rapa.  Surface detail. Reddish-bronze seeds with stipples present on the reticulum and in the interspaces. 
Brassica rapa. Surface detail. Reddish-bronze seeds with stipples present on the reticulum and in the interspaces. 
Brassica rapa. Seeds with stipples present on the reticulum and in the interspaces. 
Brassica rapa. Seeds with stipples present on the reticulum and in the interspaces.