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Rubus fruticosus

Species category

Weed

Common name

shrubby blackberry

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

D-shaped 

Size

  • Length 2–2.8 mm 
  • Width 1.4–2 mm 
  • Thickness 1–1.5 mm 

Color

Brown

Texture

Reticulate 

Other structures

HilumHilum:
The scar on the seed coat at the place of its detachment from the seed stalk (funiculus).
 is on straight margin.

Identification notes

Seeds often covered with dried fruitFruit:
A mature ovary and any associated parts.
 material.

Noxious weed seed categories

Federal

Learn more about Rubus fruticosus on ITP's Federal Noxious Weed Disseminules tool.

AOSA examination list

Not included

Nomenclature

Family

Rosaceae

Valid name

Rubus fruticosus L.

Synonyms

Rubus plicatus Weihe and Nees

Rubus fruticosus complex. True seeds that are often covered with dried fruit material. Photo by Julia Scher, USDA-APHIS-PPQ.
Rubus fruticosus complex. True seeds that are often covered with dried fruit material. Photo by Julia Scher, USDA-APHIS-PPQ.