This is a water mould (also known as downy mildew) which appears as a powdery white coating on various Lepidium species causing the stems and inflorescences to become swollen or distorted.
Wherever the host species occur.
When the host species are in leaf.
Little recorded in Britain.
Status in Leicestershire and Rutland not known.
Leicestershire & Rutland Map
Enter a town or village to see local records
Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015