Contributions towards a monograph of Phoma (Coelomycetes) — I. 2. Section Phoma: Additional taxa with very small conidia and taxa with conidia up to 7 µm long

Twenty-seven taxa in section Phoma with conidia not exceeding 7 µm in length are keyed out and described on account of their characteristics in vitro. Four new species are introduced: Phoma aurea de Gruyter, Noordel. & Boerema, Phoma crystallifer de Gruyter, Noordel. & Boerema, Phoma flavescens de Gruyter, Noordel. & Boerema and Phoma subherbarum de Gruyter, Noordel. & Boerema. As new names are proposed Phoma chenopodiicola de Gruyter, Noordel. & Boerema, Phoma pereupyrena de Gruyter, Noordel. & Boerema and Phoma selaginellicola de Gruyter, Noordel. & Boerema. New combinations of species originally classified in Phyllosticta Auct. include: Phoma ajacis (Thümen) v.d. Aa & Boerema, Phoma arachidis-hypogaeae (Vasant Rao) v.d. Aa & Boerema, Phoma haematocycla (Berk.) v.d. Aa & Boerema, Phoma piperis (Tassi) v.d. Aa & Boerema and Phoma poolensis var. verbascicola (Ell. & Kellerm.) v.d. Aa & Boerema. Host-fungus and fungus-host indices are provided, and short comments on the ecology and distribution of the taxa are given.