Pluripassalora bougainvilleae

Pluripassalora bougainvilleae (Munt.-Cvetk.) U. Braun, C. Nakash., Videira & Crous, in Videira et al., Stud. Mycol. 87: 336 (2017).

≡ Cercospora bougainvilleae Munt.-Cvetk., Revista Argent. Agron. 24: 84 (1957).

Index Fungorum number: IF 822822; Facesoffungi number: FoF 11201, Fig. 1

            Description:

Leaf spots circular to irregular, 1–5 mm diam. pale brown to greyish in the centre, and with dark brown margin. Sexual morph: Unknown. Asexual morph: Caespituli hypophyllous, inconspicuous. Mycelium 2–3 µm wide, internal, hyphae branched, septate, constricted at the septa, subhyaline to pale brown, smooth-walled. Stromata 35–38 µm diam., oval or ellipsoidal, dark brown to black, smooth-walled. Conidiophores 32–35 × 5.2–6 µm (x̄ = 32 × 5.5 µm, n = 10), fasciculate, arising from stromata, not branched, typically short, cylindrical, septate, distance between septa 13–14 µm, uniformly pale olivaceous-brown to brown, smooth-walled. Conidiogenous cells 8–10 × 5.2–6 µm (x̄ = 9.2 × 5.4 µm, n = 10), integrated, terminal, cylindrical, conidiogenous loci small, at the apex, conspicuous, ovoid to oval, somewhat thickened, but distinctly darkened. Conidia 40–55 × 4.4–7.8 µm (x̄ = 48.0 × 4.6 µm, n = 10), solitary, obclavate or cylindrical, straight to curved, 2–6-septate, pale olivaceous brown, smooth-walled, tip subobtuse, base obconic, hila 1–3 µm wide, thickened and darkened wall.

Material examined: El Salvador, La Libertad, Santa Tecla, 13.676944 -89.279722, on Bougainvilleae glabra (Nyctaginaceae), February 1960, O. Acahno (CUP-041688).