Chelidonium majus
Hardy perennial for most soils and conditions, including shade, though it needs some moisture. Important medicinal herb with a long history use including as a sedative, anti-spasmodic and detoxifier. The whole plant is toxic in moderate doses as it contains a range of isoquinoline alkaloids but there are numerous therapeutic uses when used at the correct dosage.  Ht 50cm. 9cm pot.