Physcia tribacioides4324c.jpg

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Creative Commons Licence
Description: 

Physcia tribacioides, section of lower thallus after staining with ink-vinegar, with algal layer at top and medulla and lower cortex below. The lower cortex is composed of more-or-less isodiametric hyphal cells (paraplectenchyma).

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