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Pyrenula occidentalis 8.jpg

Licence: 
Creative Commons Licence
Description: 

Pyrenula occidentalis, upper perithecial wall mounted in K, showing the K+ purple-red reaction of pigment in the outer layer. Orange and purplish pigments lower down are present in bark cells included in the perithecial wall.

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith