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Guide to Gomphonema louisiananum

Kalinsky 1984

Gomphonema Louisiananum Guide
Credit: Loren Bahls, Marina Potapova, Ian Bishop
  1. Valves lanceolate-clavate
  2. Apices narrowly rounded
  3. Striae very short

Valves are lanceolate-clavate with narrowly rounded apices. Striae are very short, resulting in a large, lanceolate-shaped axial area. A stigma is absent.