Grammothele Berk. & M.A. Curtis, Journal of the Linnean Society. Botany 10: 327 (1869).
Index Fungorum number IF 17692; MycoBank number: MB 17692
Notes – Grammothele, typified by G. lineata Berk. & M.A. Curtis, accommodates 24 species (Zhou and Dai 2012; Ryvarden 2015; Yuan 2015; Wu et al. 2016; Hyde et al. 2019). The genus is characterized by having resupinate basidiomata with shallow poroid hymenophore consisting of angular, partly sinuous, irregular or incomplete pores, dimitic or trimitic hyphal system with clamped generative hyphae and dextrinoid skeletal hyphae, usually presence of dendrohyphidia, and ellipsoid to cylindrical basidiospores that are thin-walled, smooth, colorless and not reacting both in Melzer’s reagent and Cotton Blue. Species of Grammothele commonly occur on hardwoods and monocotyledons in tropical to subtropical regions, causing a white rot (Ryvarden 1979, 2015). Previous phylogenetic studies have shown that Grammothele is polyphyletic and closely related to some other genera in the Polyporaceae, such as Porogramme (Pat.) Pat., Theleporus Fr. and Tinctoporellus Ryvarden (Zhou and Dai 2012; Yuan 2015; Wu et al. 2016; Hyde et al. 2019).
Species