Any idea what this plant is?
Best answer
Hi Joseluis! It looks like Keria japonica (genus Kerria.) in the rose family Rosaceae, native to China, Japan and Korea.
The plant is named after William Kerr, who introduced the cultivar ‘Pleniflora’. The scientific genus name is also used as a common name kerria.
Many thanks for that very good and very exhaustive reply dear Vice Professor!

🙂