Irish lichens
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Order: Gyalectales Family: Coenogoniaceae Species: Coenogonium luteum (Dimerella lutea) Growth type crustose.Photos: On shaded Willow. The Gearagh, Co. Cork, SW Ireland. Thallus thin or evanescent, light greenish-grey. Apothecia yellow-orange with paler margins, can appear +/- translucent in very wet conditions, possibly seasonal. Pycnidia are occasional, pale yellow. Ascus 8-spored. Spores colourless, 1-septate, 8-11 x 2.5-3.5 µm. Microscope photographs below. Chemical reactions negative. Occurs on moss and bark on deciduous trees in shady, damp old woodland. Similar: Dimerella pineti has smaller pinkish-white apothecia. Caloplaca species are K+ red. |
