Phyllosticta cornicola (DC.) Rabenh., Klotzschii Herb. Viv. Mycol., Edn 2: no. 454. 1857.
Index Fungorum: IF201721; Facesoffungi: FoFxxxxx; MycoBank: MB201721.
Pathogenic on Cornus florida. Sexual morph: Unknown. Asexual morph: Conidiomata (on PNA) up to 200 μm diam., pycnidial, solitary, black, erumpent, globose, exuding colourless conidial masses. Peridium up to 30 μm thick, composed of several layers of textura angularis, inner wall of hyaline textura angularis. Ostiole up to 10 μm diam., central. Conidiophores 10–20 × 4–5 μm, subcylindrical to ampulliform, reduced to conidiogenous cells, or with 1–2 supporting cells, that can be branched at the base. Conidiogenous cells 7–12 × 2.5–4 μm, terminal, subcylindrical, hyaline, smooth, coated in a mucoid layer, proliferating several times percurrently near apex. Conidia (6–)7–8 × (5.5–)6(–7) μm, solitary, hyaline, aseptate, thin and smooth walled, granular, or with a single large central guttule, ellipsoid to obovoid, tapering towards a narrow truncate base, 2–3 μm diam., enclosed in a thin persistent mucoid sheath, 1 μm thick, and bearing a hyaline, apical mucoid appendage, (3–) 4–5(–7) × 1(–1.5) μm, flexible, unbranched, tapering towards an acutely rounded tip.
Culture characteristics: Colonies erumpent, spreading with moderate aerial mycelium and feathery, lobate margins, covering dish after 1 month at 25 ºC. On OA, MEA and PDA surface olivaceousgrey, reverse iron-grey.
Representative isolate: USA, on living leaf of Cornus florida, Jul. 1999, G. Carroll, CBS H-21392, culture CBS 111639.
Hosts: Cornus florida, Cornus sanguinea (Wikee et al. 2013).
Known distribution: Czech Republic, USA (Wikee et al. 2013).
GenBank Numbers: ITS - KF170307, ACT - KF289234.
Notes: The name P. cornicola is based on European collections (Cornus sanguinea, Czech Republic), and until fresh European material has been collected, it is unsure that the name is authentic for this taxon.
Wikee S, Lombard L, Nakashima C, Motohashi K, Chukeatirote E, Cheewangkoon R, McKenzie EHC, Hyde KD, Crous PW (2013) A phylogenetic re-evaluation of Phyllosticta (Botryosphaeriales). Studies in Mycology 76: 1–29.