Our analysis has revealed a putative undescribed species in New Zealand isolated from the leaves of the exotic plant Gladiolus undulatus. We have chosen not to formally describe this as a new species, as Pithomyces gladioli (Zhang & Zhang 2003) was described from the leaves of Gladiolus communis in Jiangxi, China. The “distinctly constricted at transverse septa” conidia described in Pithomyces gladioli are not obvious in Pseudopithomyces sp. ‘gladiolus NZ’ (Fig. 13). The conidial dimensions of P. gladioli are given as 22–33 × 9.5–12 µm (Zhang & Zhang 2003) compared to our cultures that measure (13.2–) 15.8–20.4 (–32.6) × (7.2–) 9.7–12.3 (–19.3) µm, av. 18.3 × 11.1 µm, n = 140 (Fig. S6). Unfortunately, no DNA sequences are available for this species to compare. We will use the tag name Pseudopithomyces sp. ‘gladiolus NZ’ until this can be further investigated.