Galium aparine - Goosegrass
Location: Longford Park/Manchester. Goosegrass, otherwise known as cleavers is a native annual that can grow up to lengths of 1.2 meters and is capable of growing in rural and urban areas. It's flowering period is from June-August.
Goosegrass grows tiny backward pointing barbs on the leaves that can easily cling onto clothing; they also have a single vein from base to tip, another distinctive characteristic is it's stem, it also has these barbs but it grows 4 angled edges instead of a regular round shape found in most plants.