Nitzschia Oregona Guide
Credit: Pat Kociolek
  1. Valves linear-lanceolate
  2. Apices subrostrate to obtuse-capitate
  3. Fibulae 9-12 in 10 ┬Ám
  4. Striae finely punctate

Valves are linear-lanceolate, with subrostrate to obtuse-capitate apices. There are two enlarged fibulae in the central valve. Striae are finely punctate.