Arthonia spadicea Arthoniaceae
Arthonia spadicea

Growth type crustose
Thallus negative. Apothecia and pycnidia K+ pale purple

Can be abundant near the base of shaded, basic-barked, deciduous trees in moist woodlands

Immersed or greyish-green thallus with +/- rounded, flat or convex, black apothecia and frequent pycnidia. Spores 1-septate, 7-11 x 3-4 Ám. Microscope photograph below.

Similar: Arthonia didyma and Arthonia vinosa


Arthonia spadicea


Arthonia spadicea

Microscope photograph
Arthonia spadicea
Arthonia spadicea
Holton Lee and Puddletown, Dorset. December 2012, April 2017

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