ToL Scientific Contributors for Ptisana
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Maarten Christenhusz
The Natural History Museum, London, United Kingdom (Equisetum, Marattiales, Osmundaceae)
ToL Media Contributors for Ptisana
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Maarten Christenhusz
The Natural History Museum, London, United Kingdom
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Katja Schulz
Smithsonian Institution, National Museum of Natural History, Washington, DC, USA