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Guide to Frickea lewisiana

(Grev.) Heiden 1906

Frickea Lewisiana Guide
Credit: Carrie Graeff
  1. Very large, linear-lanceolate valves
  2. Expanded areolae at central area
  3. Longitudinal ribs enclose half of helictoglossa

Transapically expanded areolae are present at the central area. The distal ends of the longitudinal ribs run parallel to the linear helictoglossa, enclosing roughly half of its length.