Diatoms of North AmericaDiatoms of North America
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Guide to Humidophila undulata

Lowe et al. 2014

Humidophila Undulata Guide
Credit: Rex Lowe
  1. Valves small
  2. Valves strongly undulate
  3. Apices rostrate to cuneate

Valves are small and undulate, with rostrate to cuneate ends.