Also known as kankerroos, cocklebur (Xanthium strumarium) has become an invasive species worldwide. It invades agricultural lands and can be toxic to livestock, including horses, cattle and sheep. Some domestic animals will avoid eating the plant if other forage is present, but less discriminating animals, such as pigs, will consume the plants, sicken and die. The seedlings and seeds are the most toxic parts of the plant.
HOOKED SPINES
Cocklebur is a branched, semi-herbaceous, annual plant, growing up to 1,5m high.
Adult plants have deep, sturdy taproots. The stems are reddish-brown with red speckles that make them appear coarse. The leaves are cordiform (egg- to heart-shaped) with serrated (saw-toothed) margins.
The fruit is up to 2cm long, brown, woody, crowned with two sturdy horns, and covered with hooked spines that…
