Urena lobata

Species category

Weed

Common name

Caesarweed, aramina, chosuched e kui, dadangsi apaka, hibiscus 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.
, jute africain, common urena, bur-mallow, Congo jute

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

OvalOval:
Broadly elliptic.

Size

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

Color

Brown with dark flecks

Texture

Seed is smooth; carpelCarpel:
One section of a compound ovary.
wall has many long spines on dorsalDorsal:
Upper side or back of a seed or fruit.
side.

Other structures

HilumHilum:
The scar on the seed coat at the place of its detachment from the seed stalk (funiculus).
is large and central. CarpelCarpel:
One section of a compound ovary.
wall has spines.

Identification notes

Seed is dorsal-ventralVentral:
Adaxial; of the side of an organ facing the axis (compare dorsal).
compressed with a large ovalOval:
Broadly elliptic.
hilum. CarpelCarpel:
One section of a compound ovary.
wall has long spines with recurved points on their ends. CarpelCarpel:
One section of a compound ovary.
wall surface is woolly.

Noxious weed seed categories

State Noxious Weed: Hawaii

AOSA examination list

Not included

Nomenclature

Family

Malvaceae

Valid name

Urena lobata L.

Synonyms

Urena trilobata Vell.

 Urena lobata.  True seed with a carpel wall that has long spines. 
Urena lobata. True seed with a carpel wall that has long spines.