Polyblastia A.Massal.
Thallus crustose, rarely squamulose. Photobiont green, Protococcus. Ascocarps in the form of perithecia, simple or compound, immersed or superficial. Paraphyses filiform, richly branched and anastomosing, becoming gelatinised. Ascospores colourless, submuriform or muriform with a well-developed gelatinous sheath, 1-8 per ascus.
Polyblastia is a cosmopolitan genus of c. 120 species included in the family Pleosporaceae [Swinscow Lichenologist 5: 92-113 (1971); Harris Mich. Bot. 12: 3-68 (1973)]. One species is known from New Zealand but the genus is very poorly understood and collected here.
