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Rubus trivialis

Species category

Shrub or Tree

Common name

southern dewberry

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

ObovateObovate:
Inverted egg shaped with apical end the broadest.

Size

  • Width 2.5–3 mm
  • Length 1.5–1.7 mm
  • Thickness 0.5–0.7 mm

Color

Light brown 

Texture

Reticulations faint, equilateral in center, long at base, faint at apexApical:
The distal end of the fruit or seed away from the point of attachment or attachment scar.

Other structures

Scar is on the straight margin; a thin ridge is on the basalBasal:
The base of the fruit or seed opposite the apical end.
 part of the curved margin

Identification notes

Seeds are somewhat elongate and have different reticulations at different parts of the seed (see surface texture). Margin ridge does not occur around the entire seed margin, mostly at the base.

Noxious weed seed categories

Not listed

AOSA examination list

Not included

Nomenclature

Family

Rosaceae

Valid name

Rubus trivialis Michx.

Synonyms

Rubus carpinifolius Rydb.
Rubus continentalis (Focke) L.H. Bailey
Rubus mississippianus L.H. Bailey
Rubus okeechobeus L.H. Bailey
Rubus rubrisetus Rydb.
Rubus tallahasseanus L.H. Bailey
Rubus trivialis Michx. var. serosus L.H. Bailey

From Left to Right: 1. Rubus trivialis 2. Rubus spectabilis 3. Rubus idaeus . True seeds with reticulations that are faintly equilateral in the center, long at the base, and faint at the apex. 
From Left to Right: 1. Rubus trivialis 2. Rubus spectabilis 3. Rubus idaeus. True seeds with reticulations that are faintly equilateral in the center, long at the base, and faint at the apex.