Antique Copperplate Engraving ''Black Horehound (Ballota nigra)' 1791 James Sowerby

An eighteenth century hand-coloured copperplate engraving of Ballota nigra or the Black Horehound. This is plate number 46 from the book 'English Botany' by James Sowerby, signed by Sowerby and dated 1791. In very good condition, minimal surface marks. Mounted in acid free materials ready to display or add to a collection, plate area is approx. 17.5 by 9.5 cm, in a 10 x 8 " mount.