Preliminary version 1 June 2012
Ramalina pusilla Le Prév. ex Duby
Bot. Gall. 2: 614 (1830).
Synonym: Index Fungorum
Type: in insulis Stoechadem, Le Prévost (UPS - isotype). [TLC: sekikaic acid, triterpenoids].
Thallus: fruticose, up to 5 cm long, consisting of several irregularly branched laciniae from a well defined holdfast. Laciniae 0.8 - 4 - 6 mm broad, hollow, swollen, with scattered orbicular perforations and longitudinal cracks, grey-green, usually with numerous irregular, black patches. Soralia absent. Cortex indistinct, chondroid cylinder continuous, medulla dense. Pycnidia with black ostioles. Apothecia terminal on main and secondary branches, disc at first deeply concave, becoming flat and up to 1 cm in diameter at maturity, thalline margin sometimes blackened, spores 10 - 13 / 4 - 5 µm, mainly curved (Krog & Østhagen 1980: 287).
Chemistry:
Race I: Cortex usnic acid, medulla sekikaic acid, more or less salazinic acid, triterpenoids (Krog & Østhagen 1980: 287, by TLC)
Race II: Cortex usnica acid, medulla salazinic acid (Krog & Østhagen 1980: 287, by TLC).
Ecology: Corticolous.
Molecular data: Genbank
Distribution: Database
Note: