10.30 a.m.: At first sight this crustose lichen looks like nothing more than a pale stain on the sandstone block at the edge of the raised bed behind the pond. I’m using crayons this morning and the nearest match that I can get is mineral green, applied very lightly with a dash of other colours added. Using watercolours I would have got nearer to the grey in my photograph.
The black oval sporangia* are about a millimetre across.
A neighbouring colony of the same lichen is more densely peppered with sporangia and they appear to me to have a slight brownish cast, like coffee grounds.
I find the details easier to take in on my macro photographs than in real life but peering closely I notice a springtail wandering by. The springtail is a hexapod and it is no longer classified as an insect.