What is a pyrocanthia thorn?

Answer 1

Pyracantha is a shrubby evergreen plant that produces white flowers in early summer, followed in fall by usually orange or red-orange berries. It can produce some pretty fierce thorns, which is how it comes by its common name of "firethorn".

Answer 2

A hard structure that is derived from shoots, whose end is pointed, sharp and stiff and whose interior contains vascular bundles is what a Pyracantha thorn is.

Specifically, the shrub in question answers to the common name firethorn and belongs to the scientific genus Pyracantha. It is native to Eurasia, from southeastern Europe into southeastern Asia. It perfects defensive structures through the mildly poisonous cyanogenic glycosides in its plant parts (especially its berries), the serrated margins of its leaves, and the uncomfortable irritation of its thorny branches and trunk.