| TAXON: | Ricasolia virens (With.) H.H. Blom & Tønsberg (2016) |
| RECENT SYNONYMS: | Lobaria laetevirens, Lobaria virens |
| FAMILY: | Peltigeraceae |
| GROWTH FORM: | Foliose, heteromerous |
| SUBSTRATES: | Bark of deciduous trees; occasionally on sheltered rock in woodland or on sea-cliffs |
| PHOTOBIONT: | Coccomyxa alga; Nostoc cyanobacterium segregated in internal cephalodia |
| REPRODUCTION: | Apothecia, pycnidia |
| ASCUS: | Cylindrical; apex Peltigera-type; 8 spores |
| SPORES: | Fusiform; 1(-3)-septate; sometimes pale brown; 25–45 × 8–11 µm |
| NOTABLE FEATURES: | Thallus often large, chlorophyll green when wet, gray-green or brownish when dry; lobes wide, wavy, overlapping and sometimes wrinkled towards centre; underside very pale tan, evenly tomentose; apothecia frequent, becoming large; disc pinkish-red to tomato-red; thalline margin persistent, rolled inwards |
| CHEMICAL TESTS: | – |
| HABITAT: | Ancient oceanic woodland |
| DISTRIBUTION: | Locally common in western Scotland, western Wales and southwest England |
| CONSERVATION STATUS: | Notable; International Responsibility |
| LICHENICOLOUS FUNGI: | Nectriopsis lecanodes, Sclerococcum lobariellum, Tremella lobariacearum |
| IDENTIFICATION DIFFICULTY: | Green 1: Field identification possible |
| CONFUSION SPECIES: | – |
FIELD NOTES
To be added.
LAB NOTES
Ricasolia virens can be identified without microscopy.
SPECIMENS
Ricasolia virens : Scotland : VC101 Kintyre : NR7890 : August 2024 : On Betula trunk : © Anthony Speca : CC BY-SA 4.0
Ricasolia virens : Scotland : VC101 Kintyre : NR7992 : August 2024 : On Salix trunk : © Anthony Speca : CC BY-SA 4.0
Ricasolia virens : Scotland : VC101 Kintyre : NR7991 : August 2022 : On Quercus trunk : © Anthony Speca : CC BY-SA 4.0
