Synonymy:
Grammothele polygramma Berk. & M.A. Curtis, J. Linn. Soc., Bot. 10(no. 46): 327 (1868) [1869]

Grammothele grisea Berk. & M.A. Curtis, J. Linn. Soc., Bot. 10(no. 46): 327 (1868) [1869]
Porogramme grisea (Berk. & M.A. Curtis) Pat., Essai Tax. Hyménomyc. (Lons-le-Saunier): 64 (1900)

Grammothele mappa Berk. & M.A. Curtis, J. Linn. Soc., Bot. 10(no. 46): 327 (1868) [1869]

Polyporus hydnoporus Berk., in Glaziou, Vidensk. Meddel. Dansk Naturhist. Foren. Kjøbenhavn 80: 31 (1880) [1879-1880]
Poria hydnopora (Berk.) Sacc., Syll. Fung. (Abellini) 6: 325 (1888)
Grammothele hydnopora (Berk.) Bres., Annls mycol. 18(1/3): 43 (1920)

Polyporus carneopallens var. cinereus Pat., J. Bot., Paris 3: 341 (1889)

Grammothele cineracea Bres., Hedwigia 56(4,5): 299 (1915)

Grammothele hydnopora var. bahianensis Bres., Annls mycol. 18(1/3): 43 (1920)

Grammothele simplex Pat., Bull. Mus. natn. Hist. nat., Paris 29: 333 (1923)

Position in classification:
Grammothele, Polyporaceae, Polyporales, Incertae sedis, Agaricomycetes, Basidiomycota, Fungi

Note:
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