Hedge Mustard (Sisymbrium officinale). One of the key features for identifying the cabbage family is the shape and arrangement of the seed pods. This picture shows how they lie pressed flat to the stem.
(Photo: marshWalker on the Waterlands on 17/July/2007)
Click to see plant on bridge steps.
Hedge Mustard (Sisymbrium officinale) on the railway bridge between the bridge over the Flood Relief Channel and Argall Way, early summer. (Photo: Brind 17/June/2012)