Rubus ursinus, commonly called the trailing blackberry or the California blackberry, is native to the Pacific Coast of North America. Rubus ursinus is a large plant that is highly competitive and grows rapidly; each cane can extend up to 15 feet in length, according to the University of Washington.
Rubus argutus, also called the sawtooth blackberry, is native to the southeastern portions of the United States, but is commonly grown across the country. Their common name is well deserved as these blackberry bushes often form dense thickets and posses many small thorns that make them impossible to pass through.
Rubus fruticosus is a European blackberry that is often referred to as a bramble. Brambles are known for their vigorous growth and require season pruning to prevent the plant from becoming invasive. Brambles are highly valued for their ability to attract wildlife to home gardens.