Pyrenula macrospora Pyrenulaceae
Pyrenula macrospora

Growth type crustose
Chemical results: K+ yellow, C-, KC-, P+ weak yellow, UV +/- weak yellow

Most frequent Pyrenula species, can be locally common in South and West on shaded, smooth-baked trees.

Mosiac-forming olive-brown to creamy yellow thallus with flecks of white pseudocyphellae and black prothallus. Black perithecia to 1mm, ostiole visible when mature. Spores brown, 3-septate, 25-35 x 8-12 Ám. Microscope photograph below.

Similar: P. chlorospila has smaller perithecia (photo below for comparison)


Pyrenula macrospora


Pyrenula macrospora

Microscope photograph

Pyrenula macrospora
Kimmeridge, Dorset and New Forest, Hants. December 2012, January 2013

All images used are copyright. Please contact me if you find errors.