On a forgotten floristic map of Malaysia (H. Zollinger, 1857)

I have hesitated some time over the title of the present paper. The alternative was something like: ”WALLACE versus ZOLLINGER“ or ”The ”idea of a demarcation line through Malaysia, a limiting factor towards ”the progress of biogeography“. However, the first being too agressive, and the second too melodramatic ,the one found in the heading was chosen. The above introductory lines mean to put the reader at once face to face with the nucleus of what I will discuss here: the question how ZOLLINGER’S ”Karte der Flora Malesiana“ of 1857 was apparently almost entirely forgotten, although it well deserves to come under the eyes of modern biogeographers, for the sake of the honour of its author and of the priority of his work.