Hedge Mustard
Sisymbrium officinale

This native course-looking annual is very common in bare ground, roadsides, wasteland and edges of fields and is often found with Poppies. The branches grow at wide angles from the main shoot and have clusters of tiny yellow flowers, followed by cylindrical fruits which are pressed closely to the stem. The dead branches often become detached in winter and form an urban 'tumbleweed', helping disperse the seeds. In parts of Scotland, it has been used as a treatment for the common cold by putting your feet in a hot mustard bath, draping a towel over your knees to keep in the steam for four or five minutes.