Thelidium papulare Verrucariaceae
Thelidium papulare

Growth type crustose
Chemical results negative.

Infrequent on damp, basic rocks; limestone, calcareous sandstone, basalt and mudstone

Immersed brown or greyish thallus, the large black perithecia (to 0.8mm) slightly depressed at the apex, often with thalline collar at base. Spores are 3(-5) septate, (27)36-50(65) x (11)14-19(23) Ám.
Microscope photograph below.

Similar: T. incavatum, spores 3(-5) septate, perithecia +/- immersed. Thelidium decipiens, spores 1-septate


Thelidium papulare

Thelidium papulare

Thelidium papulare

Microscope photograph
Thelidium papulare
Thelidium papulare
Branksome Park, Dorset. February 2017

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