Encyonema Triangulum Guide
Credit: Loren Bahls
  1. Valves elliptic-lanceolate
  2. Apices acute
  3. Areolae coarse

Encyonema triangulum has broad, elliptic-lanceolate valves with acute apices. The areolae are extremely coarse and number 8-10 in 10 µm.