Navicula Winona Guide
Credit: Loren Bahls
  1. Valves narrowly lanceolate
  2. Apices very narrow and subcapitate
  3. Areolae coarse
  4. Striae widely spaced near central area

Navicula winona has narrowly lanceolate valves with gradually attenuated, narrow subcapitate apices. Areolae are coarse and number 24-28 in 10 μm.