Triumfetta rhomboidea

Species category

Weed

Common name

diamond burbark, burrBurr:
Has spikelets or flowers that are compressed closely together by lacking a central axis. The spikelet glumes are hard and pointed, e.g. buffalograss.
bush, Chinese burrBurr:
Has spikelets or flowers that are compressed closely together by lacking a central axis. The spikelet glumes are hard and pointed, e.g. buffalograss.
, dadangsi, masiksik lahe, mo'osipo, paroquet bur, diamond burrbark

Diagnostic characters

Planting unit

BurrBurr:
Has spikelets or flowers that are compressed closely together by lacking a central axis. The spikelet glumes are hard and pointed, e.g. buffalograss.

Shape

Spiny and globose

Size

  • Length 4 mm 
  • Width 4 mm 
  • Thickness 4 mm 

Color

Yellowish-brown

Texture

Densely covered with short, woolly hairs

Other structures

Short, stiff, hairs and hooked spines present.

Identification notes

The photo shows a fruitFruit:
A mature ovary and any associated parts.
of the species. A seed was not available for photography. A drawing of the seed was found in USDA-ARS Technical Bulletin 1719 "Identification of DisseminulesDisseminule:
Detachable plant part capable of being disseminated and of propagating, commonly a seed or fruit.
Listed in the Federal Noxious Weed Act".

Noxious weed seed categories

State Noxious Weed: Hawaii

AOSA examination list

Not included

Nomenclature

Family

Malvaceae

Valid name

Triumfetta rhomboidea Jacq.

Synonyms

Triumfetta bartramia L.
Triumfetta excisa Urb.

 Triumfetta rhomboidea.  Burrs with short, stiff, hairs and hooked spines. 
Triumfetta rhomboidea. Burrs with short, stiff, hairs and hooked spines.