Otto, R., Germany

• Collectanea Botanica Vol. 35 (2016) - Articles
  New xenophytes from La Palma (Canary Islands, Spain), with emphasis on naturalized and (potentially) invasive species
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• Collectanea Botanica Vol. 37 (2018) - Articles
  New xenophytes from La Palma (Canary Islands, Spain), with emphasis on naturalized and (potentially) invasive species – Part 2
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• Collectanea Botanica Vol. 39 (2020) - Articles
  New xenophytes from La Palma (Canary Islands, Spain), with emphasis on naturalized and (potentially) invasive species – Part 3
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