Phaeographis dendritica

White to greenish 'creamy' thallus with open dendritic lirellae, as they open up through the thallus they can give the impression of a ship's bow wave.

This specimen was found on Petersfield Heath on an oak twig.

The dark border to the lirellae continues right under the fruiting body as can be seen here, the dark bit  is the lower surface.

Elongated spores with lens like cells and 7-9 septate, 30-50 x 6-10 mu

 

Parmotrema reticulatum

Very similar to Parmotrema perlatum and less common, but can be found on Petersfield Heath. It seems to form more upright defined rosettes. Very much a southern species it is found near the south coast.

The lobes are dark in the middle but a tan colour towards the ends of the lobes with rhizines (root like hairs) all the way to the lobe edge which is crinkly and turned up.

The surface of the lobes has a reticulate white pattern said to resemble cigarette paper and a strong red reaction with K.