Myriospora rufescens Acarosporaceae
Myriospora rufescens (Acarospora rufescens)

Growth type crustose
Chemical results negative

Local distribution on siliceous substrata including sandstone, monuments, gravestones, and walls.

Thallus smooth, forming pale brown, areolate crust, aureoles angular with concave surface. Each areole contains one or two immersed apothecia, margins slightly raised. Asci multi-spored, spores 3-4 1-1.5 m. Microscope photograph below.

Similar: M. smaragdula usually K+ red, 3-7 apothecia in each areole

Myriospora rufescens

Myriospora rufescens

Microscope photograph
Myriospora rufescens
Myriospora rufescens
On heathstone. Redhorn Bay, Dorset. June 2015

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