Phyllactinia liriodendri U. Braun

LaGreca, Scott, Crouch, Uma, Paul, Andrew, Thomas, Jacklyn, Thompson, Jake, Shaw, Christian, Cubeta, Marc A., Braun, Uwe & Bradshaw, Michael, 2025, Hidden treasures of herbaria - even small collections contain a wealth of diversity: the powdery mildews of the North Carolina State Larry F. Grand Mycological Herbarium, IMA Fungus 16, pp. e 156231-e 156231 : e156231-

Phyllactinia liriodendri U. Braun , in Braun and Cook, Taxonomic Manual of the Erysiphales (Powdery Mildews): 260. 2012.

Type.

USA • Pennsylvania, Centre County, State College Campus , on Liriodendron tulipifera , 1889, W. A. Buckhout ( BPI 859705 — holotype) .

Epitype.

(designated here, MycoBank, MBT 10025444): USA • North Carolina, Wake County, Raleigh , on Liriodendron tulipifera , November 1972, L. Lazo s. n. ( NCSLG 22914 ). Ex-epitype sequences: PQ 585171 (ITS), PQ 589086 (TUB) .

Notes.

Phyllactinia liriodendri was included in phylogenetic-taxonomic studies recently published by Bradshaw et al. (2025 b). The authors suggested that sequences from specimens of this species form highly supported species clades in concatenated, ITS + 28 S, and TUB analyses, confirming the status of P. liriodendri as a species within the morphologically poorly differentiated genus Phyllactinia , which requires sequence data for unequivocal identifications. Ex typus sequences are the best option to obtain and analyze reference sequences for phylogenetic-taxonomic purposes. However, the type of P. liriodendri from 1889 is very old and sequencing was not attempted. In such cases, epitypification with ex-epitype sequences is the method of choice.