What is Philip Miller’s “Perennial Moonwort,” Lunaria perennis (Brassicaceae/Cruciferae)?
The new combinations Acuston perenne (Mill.) Mabb. & Al-Shehbaz and A. perenne subsp. obovatum (Boiss. & Kotschy) Mabb. & Al-Shehbaz are proposed. The nomenclatural history, images of relevant types, and detailed descriptions of Acuston Raf. and A. perenne are provided for the first time.