Hymenelia epulotica Hymeneliaceae
Hymenelia epulotica

Growth type crustose. BLS conservation evaluation: LC NS
Chemistry negative. Photobiont Trentepohlia, thallus scratches orange

Found on damp calcareous rocks and often on limestone rock fragments or scree. Occasional on siliceous rocks flushed by base-rich water

Thallus yellowish or pink-grey when fresh, endolithic or cracked areolate and orange when scratched. Apothecia with thick margins, pinkish-brown when wet, spores simple, 13-22 x 5-12 Ám. Micrograph below showing the Trentepohlia photobiont

Similar: Hymenelia prevostii. Visually identical but photobiont Trebouxia


Hymenelia epulotica

Microscope photograph
Hymenelia epulotica
Hymenelia epulotica
On limestone. Portland, Dorset. March 2016

All images used are copyright. Please contact me if you find errors.