'Rebel botanists' in Plymouth identify urban plants
Chalk markings have started to appear on pavements around Plymouth.
A group of amateur botanists called the Rebel Botanists, external have started a mission to label so-called weeds on verges and pavements.
Their passion for the plants most people ignore often extends to having a sniff and the results may be surprising.
Plymouth City Council said: "We fully support the Rebel Botanists and their activities to educate and inspire people to connect with nature in a positive way."
Video Journalist: Jonathan Morris