Species category

Weed

Common name

rough cocklebur, Canada cocklebur, cocklebur, common cocklebur

Diagnostic characters

Identification notes

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.
with several involucreInvolucre:
A number of bracts (often leaf-like) that subtend an inflorescence such as the head in sunflowers.
, hooked spines on the surface. Shape is ovateOvate:
Egg-shaped with basal end the broadest.
longitudinally and cylindrical in cross section. This structure can be considered to be a modified headHead:
An inflorescence of stalkless or nearly stalkless flowers attached to a common receptacle that often assumes the appearance of a single flower, but in fact may be a composite of many flowers, e.g. sunflower, clover.
. These burrsBurr:
Has spikelets or flowers that are compressed closely together by lacking a central axis. The spikelet glumes are hard and pointed, e.g. buffalograss.
usually contains two achenesAchene:
A dry, hard, one-chambered, one-seeded indehiscent fruit, as in buckwheat (Fagopyrum) or sunflower (Helianthus). The fruit wall is not united with the seed coat.
. Color is yellow to dark brown.

Noxious weed seed categories

State Noxious Weed: Alabama, Arkansas, Arizona, Delaware, Florida, Georgia, Hawaii, Iowa, Indiana, Kansas, Louisiana, Maryland, Michigan, Mississippi, North Carolina, Oklahoma, South Carolina, Tennessee, Texas, West Virginia

AOSA examination list

Included

Nomenclature