Some didymosporous species of Nectria with nonmicroconidial Cylindrocarpon anamorphs

Nine species of Nectria with didymosporous ascospores are described or redescribed. Cylindrocarpon anamorphs are redescribed or newly described for eight of these species. A new group within Nectria is introduced centered on N. veuillotiana. Nectria veuillotiana and its C. candidulum anamorph are redescribed and its known geographical range extended. Cylindrocarpon coronatum is newly described as the anamorph of N. coronata. Nectria acrotyla (C. mirum) and N. platycephala (C. permirum) are described as new species in the group. The new species N. polylepidis was not grown in pure culture but also belongs to this group and is assumed to have a Cylindrocarpon anamorph. Nectria cinnamomea (C. cinnamomeum), N. neblinensis (C. neblinense), N. rubrococca (C. arcuatum) and N. verrucospora (C. torpidum) are also described as new species, but not assigned to any known Nectria group. N. veuillotiana is predominantly temperate whereas the other taxa have tropical distributions.