Plants bearing thorns, brambles, spines, or prickles are often used as a defence against burglary, being strategically planted below windows or around the entire perimeter of a property. They also have been used to protect crops and livestock against marauding animals.

Why are brambles spiky?

Mr Gilman's speculation is probably correct; the thorns encourage selective consumption of the fruit, especially by birds who are likely to spread the seeds widely. It should also be noted that brambles were selectively cultivated by humans to have thorns so that they could be used for enclosing fields.

What is the function of bramble thorns?

Plants bearing thorns, brambles, spines, or prickles are often used as a defence against burglary, being strategically planted below windows or around the entire perimeter of a property. They also have been used to protect crops and livestock against marauding animals.