German doctor and naturalist from Lissa, Posen, who for several years practiced medicine and collected in the Western Cape Province before setting out as a company agent on an expedition to Pondoland in 1888. Accompanied by Conrad Beyrich, he travelled by horseback for more than a year, reporting on the region's natural resources for the Berlinische Pondo Gesellschaft, which was seeking to acquire land for trade and settlement. Returning to Germany at the end of his journey, he published an account in 1901, SüdAfrika: Reisen, Erlebnisse und beobachtungen in der Kapkonie, Natal und Pondoland. Cryptogams feature prominently in his collection. The genus Bachmannia Pax in the Capparaceae and a number of species including Kniphofia bachmannii Baker,Leonotis bachnmannii Gürke and Struthiola bachmanniana Gilg, are all named after him.