Contributions towards a monograph of Phoma (Coelomycetes) VI — 2. Section Phyllostictoides: Outline of its taxa

Thirty taxa in Phoma sect. Phyllostictoides, characterised by secondary septation of a variable number of conidia, are described in vitro. Two Phyllostictoides-like species are (re)classified in sect. Sclerophomella on account of certain pycnidial characteristics. Short notes on the ecology and distribution are added. Newly proposed taxa are: Phoma acetosellae (A. L. Sm. & Ramsb.) Aa & Boerema comb, nov., Phoma argillacea (Bres.) Aa & Boerema comb. nov. (teleomorph Didymella applanata (Niessl) Sacc.), Phoma nepeticola (Melnik) Dorenb. & de Gruyter comb, nov. (teleomorph Didymella catariae (Cooke & Ellis) Sacc.), Phoma destructiva var. diversispora de Gruyter & Boerema var. nov., Phoma heliopsidis (H.C. Greene) Aa & Boerema comb, nov., Phoma laundoniae Boerema & De Gruyter spec. nov. and Phoma rhei (Ellis & Everh.) Aa & Boerema comb. nov. A key is given to the cultural characteristics of all species and varieties at present recognised within the section (including the two Phywllostictoides-like species of Sclerophomella), as well as indices on host-fungus and fungus-host relations.