Stagonosporopsis pogostemonis M. Luo, Y.H. Huang, & Manawas., sp. nov.
Index Fungorum number: IF558590, Faces of fungi: FoF 09997.
Etymology–In reference to the host genus name Pogostemon.
Holotype–ZHKUCC 21-0001
Pathogenic on Pogostemon cablin leaves. Sexual morph: Not observed. Asexual morph: Conidiomata solitary, scattered, mostly covered with dense vegetative hyphae, subglobose or lageniform, dark brown to black, thick-walled, pycnidial. Pycnidia 34–161 µm × 32–98 µm (x̄ = 58 ± 27 µm × 45 ± 16 µm, n = 50), subglobose, arranged irregularly in a disc, with conidium and a circular or longitudinal ostiole. Pycnidial wall pseudoparenchymatous, composed of several layers of angularis cells. Conidiogenous cells not observed. Conidia 3–5 μm × 1–3 μm (x̄ = 4 ± 0.4 μm × 2 ± 0.3 μm, n = 50), oblong, cylindrical to ellipsoidal, with rounded both ends, smooth-walled, aseptate, with two polar guttules.
Morphological characteristics of Stagonosporopsis pogostemonis (Ex holotype ZHKUCC 21-0001). (a, b) Fron and reverse view on PDA after 5 days at 28°C. (c, d) Front and reverse view on MEA after 7 days at 28°C. (e, f) Front and reverse view on OA after 7 days at 28°C. (g) Pycnidia a on PDA. (h) Longitudinal section of Pycnidia on PDA. (I) Pycnidia wall. (j) Hyphae. (k) Developing Chlamydospores. (l, m) Conidia. Scale bars: g = 200 μm; h, k, l, m = 10 μm.