I painted European mountain ash ringspot virus (affecting Sorbus aucuparia, also known as rowan) for the May illustration in the BSPP 2024 Plant Pathogens Calendar.

BSPP 2024 Calendar – Images by Helen Pennington – BSPP – The British Society for Plant Pathology

The painting shows a pinnate compound rowan leaf. It features seven pairs of opposing leaflets and a single terminal leaflet at the tip. The leaflets display the distinctive symptoms of ringspot virus infection, including yellow mottling and concentric ringspots.