Galeopsis tetrahit

Species category

Weed

Common name

brittlestem hempnettle

Diagnostic characters

Planting unit

NutletNutlet:
A small, dry, indehiscent carpel of a fruit, usually composed of one quarter of the fruit with each enclosing a single seed (e.g. mints).

Shape

ObovateObovate:
Inverted egg shaped with apical end the broadest.
with two flat sides

Size

  • Length 3 mm
  • Width 2.5 mm
  • Thickness 2 mm

Color

Brown with many light brown raised areas

Texture

Rough with many irregular tubercles

Other structures

Scar is flush with the base.

Identification notes

Raised irregular structures on the nutletNutlet:
A small, dry, indehiscent carpel of a fruit, usually composed of one quarter of the fruit with each enclosing a single seed (e.g. mints).
surface are light brown, whereas the background is dark brown. The two flat surfaces converge just above the single scar.

Noxious weed seed categories

State Noxious Weed: Alaska 

AOSA examination list

Not included

More information

For more information, see ISMA fact sheet.

Nomenclature

Family

Lamiaceae

Valid name

Galeopsis tetrahit L.

 Galeopsis tetrahit.  Nutlets that are brown with many light brown raised areas. 
Galeopsis tetrahit. Nutlets that are brown with many light brown raised areas.