Keywords: Franz Karl Mertens (1764-1831).png en Botanist Franz Karl Mertens 1764-1831 1820 http //huntbot andrew cmu edu/HIBD/Departments/Archives/Archives-HR/Mertens shtml HIBD via German Wikipedia Artist Karl Mertens the son of the subject Franz Karl Mertens printed by C Hullmandel ca 1820 PD-old-100 Uploaded with UploadWizard Franz Karl Mertens |