telemorph name should be used, with its morph code, e.g. Tubercularia vulgaris (the anamorph of Nectria cinnabarina) could be entered as ‘Nectria cinnabarina’ with morph code A. If you specialise in the ascomycetes, or the conidial (anamorphic, imperfect) fungi or the rusts you will be familiar with these terms and know what to enter. If your interests are not in this area you can ignore this field.
The spore stages of rust fungi
Rust fungi are interesting and complex in that in some the same species can be found on two different host plants at different times, where they may produce spores of up to five different types. The five possible spore stages are indicated by the Roman numerals 0, I, II, III, and IV; use the morph field to indicate the spore stages present when recording rusts. For a clear explanation of these spore stages you should refer to the excellent Guide for the Amateur Mycologist: 5. Downy Mildews, Powdery Mildews, Smuts and Rusts by T. F. Preece (see Appendix 1).