Ramalinaceae Bacidia laurocerasi Growth type crustose Chemical results: Negative. Outer edge of apothecia K+ violet On basic or nutrient-rich bark of lightly shaded deciduous shrubs and trees Smooth or warted grey to grey-green thallus with frequent apothecia, discs reddish-brown to brown-black, paler in shade, 0.4-1 mm diam. Edge of discs often tinged purple (use x10 lens). Asci are 8-spored, the spores colourless, 7-16 septate, 35-80 x 3-4 µm but the septa are often indistinct. Microscope photographs below. Similar: Bacidia biatorina has a granular or granular-isidiate thallus

Microscope photographs





Bacidia laurocerasi
Studland and Broadstone, Dorset. October 2012, March 2024