Armenian blackberry (Rubus armeniacus) belongs to the family Rosaceae (the Rose family). It is a perennial herb that is native to Armenia and Northern Iran, and it was introduced to Europe, Australasia and North America in the 1800s. Nowadays, it is widely naturalised elsewhere. The stem can reach 4-10 m long, trailing along the ground or arching. The leaves on first year shoots are 7–20 cm long, palmately compound with five leaflets. The leaves on second year are smaller with three leaflets which bear thorns along the midrib on the underside. In its second year, the white or pale pink flowers bloom on panicles in late spring and early summer. The fruit is an aggregate fruit of numerous drupelets, and ripening black or dark purple.