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Modern sequels to the Kaiserin-Augusta-Fluss itinerary of Carl Ledermann: Rhysotoechia welzeniana sp. nov. (Sapindaceae), a remarkable species from the upper Sepik of Papua New Guinea

. Phytotaxa. 61, 1 (Aug. 2012), 55–60. DOI:https://doi.org/10.11646/phytotaxa.61.1.5.