Blackberry 

Scientific name: Rubus fruticosus

Description

Blackberry is a perennial, semi-deciduous, prickly, scrambling invasive weed. It is a semi-prostrate to almost-erect shrub, with arching and entangling stems arising from a woody crown and forms thickets up to several metres high. The root/crown system is the only perennial part of the plant with the foliage dying back annually.