Born in Hanover in 1836, he was chosen by William Jackson Hooker, Director of the Royal Botanic Gardens, Kew, to take part in William Balfour Baikie's expedition to West Africa. While there, he sent numerous specimens back to Kew.
Mann, G., H. Wendland, Hooker, Sir J. D. On the palms of western tropical Africa. R. Taylor, 1864, London. Mann, G. List of Assam ferns. C. Wolf & Sohn, 1898?, München
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