• Opegrapha sorediifera P.James
Opegrapha sorediifera
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This small, crustose epiphyte with a thin, dark brown thallus is commonly encountered sterile, that is, without its slit-like discs. It is recognised by its abundant sprinkling of small, beige to orange-yellow, powdery soralia. It is relatively common on the deciduous bark of trees such as sallow, especially in marshy or swamp-like habitats.

Key characteristics

  • It may be confused with the less common Opegrapha multipuncta that has yellower, often confluent soralia that react C-
  • Opegrapha sorediifera is C+ red, and the soralia are UV+ red. Opegrapha corticola is also similar, but has larger, duller beige soralia that are C-.

Original text submitted by Simon Davey

 Simms, M. J., (2016). Opegrapha sorediifera P.James. [In] LichenIreland. Accessed on 2018-08-17.