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Brassica nigra

Species category

Vegetable

Common name

black 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: 1.5–1.8 mm
  • Width: 1.5–1.8 mm
  • Thickness: 1.5–1.8 mm

Color

Brown

Texture

Reticulum is smoother; stipplesStipples:
Numerous small dots or specks.
 are small and only on the inner spaces.

Other structures

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

Identification notes

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, Colorado, Connecticut, Florida, Georgia, Iowa, Illinois, Kansas, Louisiana, Maine, Massachusetts, Mississippi, Nebraska, New Hampshire, North Carolina, Oklahoma, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Virginia, Vermont, Washington

AOSA examination list

Included

Nomenclature

Family

Brassicaceae

Valid name

Brassica nigra (L.) W.D.J. Koch

Synonyms

Sinapis nigra L.

From Left to Right: 1. Brassica nigra 2. Sinapis arvensis 3. Brassica juncea. Seeds with shiny stipples present in the interspaces but not on the reticulum.
From Left to Right: 1. Brassica nigra 2. Sinapis arvensis 3. Brassica juncea. Seeds with shiny stipples present in the interspaces but not on the reticulum.
From Left to Right: 1. Brassica nigra 2. Sinapis arvensis 3. Brassica juncea 4. Brassica rapa subsp. campestris. Seeds with small, shiny stipples.
From Left to Right: 1. Brassica nigra 2. Sinapis arvensis 3. Brassica juncea 4. Brassica rapa subsp. campestris. Seeds with small, shiny stipples.