Additional notes on Phoma herbarum

The sporogenesis of Phoma herbarum Westend., and Phoma species in general, is discussed. Additional data are given on the synonymy of P. herbarum and the status of its various infraspecific taxa is revised. Most of the ‘varieties’ and ‘forms’ appear to belong to the ubiquitous species Phoma exigua. Phoma macdonaldii is proposed as a new species and Stagonospora samarorum (Desm.) as a new combination.