| TAXON: | Ramalina siliquosa (Huds.) A.L. Sm. (1918) |
| RECENT SYNONYMS: | – |
| FAMILY: | Ramalinaceae |
| GROWTH FORM: | Fruticose, heteromerous |
| SUBSTRATES: | Coastal siliceous rock; occasionally coastal lignum; rarely inland siliceous rock or worked stone exposed to maritime influence |
| PHOTOBIONT: | Trebouxioid alga |
| REPRODUCTION: | Apothecia and pycnidia |
| ASCUS: | Elongate-clavate; apex Bacidia-type; 8 spores |
| SPORES: | Ascospores ellipsoidal or kidney-shaped, 11-20 × 5-6 µm; conidia bacilliform |
| NOTABLE FEATURES: | Thallus pale grey-green, glossy; lobes erect or sometimes pendent, flattened and often ‘scimitar-like’, usually but not always with few branches; holdfast spreading; apothecia frequent, usually lateral but sometimes terminal; discs cream to flesh-coloured; pycnidia abundant, with pale ostioles |
| CHEMICAL TESTS: | Medulla either (a) Pd+ orange-red (protocetraric acid); (b) K+ red, Pd+ orange (salazinic acid); (c) UV+ blue-white (hypoprotocetraric acid); or (d) no reactions |
| HABITAT: | Coastal cliffs and rock in xeric-supralittoral zone |
| DISTRIBUTION: | All around Britain except where rocky shores absent |
| CONSERVATION STATUS: | Least Concern |
| LICHENICOLOUS FUNGI: | Lichenoconium erodens, Marchandiomyces corallinus, Stigmidium epiramalina |
| IDENTIFICATION DIFFICULTY: | Green 1: Field identification possible |
| CONFUSION SPECIES: | Ramalina cuspidata |
FIELD NOTES
To be added.
LAB NOTES
To be added.
SPECIMENS
Ramalina siliquosa : Scotland : VC97 West Inverness-shire : NM6591 : August 2025 : On siliceous outcrop : © Anthony Speca : CC BY-SA 4.0
Ramalina siliquosa : Scotland : VC101 Kintyre : NR7372 : August 2023 : On siliceous outcrop (left) and boulder (right) : © Anthony Speca : CC BY-SA 4.0
Ramalina siliquosa : Scotland : VC101 Kintyre : NR8868 : August 2023 : On siliceous boulder : © Anthony Speca : CC BY-SA 4.0
Ramalina siliquosa : Scotland : VC101 Kintyre : NR6974 : August 2023 : On siliceous outcrop : © Anthony Speca : CC BY-SA 4.0
Ramalina siliquosa : Scotland : VC101 Kintyre : NR7074 : August 2023 : On siliceous boulder : © Anthony Speca : CC BY-SA 4.0
Ramalina siliquosa : Scotland : VC101 Kintyre : NR7074 : July 2023 : On siliceous boulder : © Anthony Speca : CC BY-SA 4.0
Ramalina siliquosa : Scotland : VC101 Kintyre : NR6974 : July 2022 : On siliceous boulder : © Anthony Speca : CC BY-SA 4.0
