| Planothidium
Planothidium frequentissimum (Lange-Bertalot)
Round & Bukhtiyarova = Achnanthes frequentissima Lange-Bertalot
Planothidium lanceolatum (Breb. ex Kutz.) Lange-Bert.
= Achnanthes lanceolata (Brebisson) Grunow
Planothidium rostratum (Ostrup)
Round & Bukhtiyarova
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