• Gentianaceae 

      Marloth, R. (Rudolf), 1855-1931 (1932)
      Plate 16 from The flora of South Africa (vol. 3, part 1) featuring Gentianaceae.
    • Gentianaceae 

      Marloth, R. (Rudolf), 1855-1931 (1932)
      Plate 15 from The flora of South Africa (vol. 3, part 1) featuring Gentianaceae.