Sinapis arvensis | SeedImages

Species category

Weed

Common name

charlock 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 1.5–1.7 mm
Width 1.5–1.7mm
Thickness 1.5–1.7 mm

Color

Black

Texture

Indistinct reticulum or 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).
is flush with curved surface.

Identification notes

Seeds spherical. Reticulum fine, indistinct or may appear to be lacking with interspaces very small. StipplesStipples:
Numerous small dots or specks.
very minute and partially or completely obscured. Color is black. (Syn. Brassica arvensis and B. kaber.)

Noxious weed seed categories

State Noxious Weed: Alaska, Arizona, Colorado, Illinois, Iowa, Kansas, Massachusetts, Nebraska, Nevada, Louisiana, Michigan, Ohio, Pennsylvania, Virginia, South Dakota, Texas, Washington, Wisconsin, Wyoming

AOSA examination list

Included

More information

For more information, see ISMA fact sheet.

Nomenclature

Family

Brassicaceae

Valid name

Sinapis arvensis L.

Sinapis arvensis. True seeds with a fine reticulum that may be indistinct or may appear to be lacking, with interspaces very small.	Sinapis arvensis. True seeds with a fine reticulum that may be indistinct or may appear to be lacking, with interspaces very small.
From Left to Right: 1. Brassica nigra 2. Sinapis arvensis 3. Brassica juncea 4. Brassica rapa subsp. campestris.True seeds with a flush hilum with a curved surface.	From Left to Right: 1. Brassica nigra 2. Sinapis arvensis 3. Brassica juncea. True seeds that are reticulated.