Illustration of Nepenthes beccariana
<bdi><a href="https://en.wikipedia.org/wiki/en:John_Muirhead_Macfarlane" class="extiw" title="w:en:John Muirhead Macfarlane"><span title="British botanist (1855-1943)">John Muirhead Macfarlane</span></a>
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Macfarlane, J.M. 1908. Nepenthaceae. In: A. Engler Das Pflanzenreich IV, 111, Heft 36: 1–91.