|
Order: Arthoniales Family: Lecanographaceae
Species: Zwackhia viridis (Opegrapha viridis) Photos: On Ash. Caha Pass, Co. Cork, SW Ireland. Identification confirmed by J Douglass Forms small patches of thin or inconspicuous, brownish or olive-green thallus. The small, scattered apothecia are short and +/- rounded and 'button-like' with a narrow, slit-like disc. Asci 8-spored, spores (8-)11-15 septate (with a perispore), 23-60 x 6-9 µm. Chemical reactions negative. Microscope photographs below. Found in SW Ireland, usually on the shaded bark of young Hazel, Holly, Oak and salix in old woodlands. |
Microscope photographs
Zwackhia viridis (Opegrapha viridis). January 2012