Mark Powell, Discover and Read the Best of Twitter Threads by @obfuscans3

Mark Powell

obfuscans3

I have attempted take better micrographs of the ascus tip in Xanthoria parietina.How do my attempts compare with the published diagrams?Threadhttps://twitter.com/obfuscans3/status/1388175439911346185 First here is a section through the hyme

It is usual for ivy to lose a proportion of its old, yellowing leaves in late spring but something different seems to be happening this year. Wholescale die-back, often associated

I *think* I found a new lichen species for Britain this week while on my daily lock-down walk. This thread will give the story so far and explain my slight

These are the hyphae in a pycnidial wall. Is there anything familiar about them? It is a pycnidium from a common lichen but one that rarely produces conidia. The conidia