Coleosporium perillae P. Syd.
Uredinia on lower leaf surface, subepidermal, erumpent, round to ellipsoidal, >200 µm, yellow fading to white.
Urediniospores globose to subglobose, apex obtuse, hyaline to subhyaline, 18-21 × 17-20 µm; wall 2.0-2.5 µm thick, densely verruculose.
Specimens cited in description:
- BRIP 58375
- Perilla frutescens
Coleosporium perillae was described on Perilla frutescens (as P. arguta) from Japan by Sydow (1899). It was considered a synonym of C. plectranthi by Hiratsuka et al. (1992, cited in Yun et al. 2007). Coleosporium plectranthi was described on Isodon lophanthoides (as Plectranthus gerardianus) by Barclay (1889) and reported from Korea by Yun et al. (2007). We have applied C. perillae rather than C. plectranthi to recognise diversity based on host range in species of Coleosporium.