| Xylaria corniculata Sacc., 1906 |
| Xylaria corniformis (Fr.) Fr., 1849 |
| Xylaria corniformis var. corniformis (Fr.) Fr., 1849 |
| Xylaria corniformis var. macrospora Bres., 1908 |
| Xylaria cubensis (Mont.) Fr., 1851 |
| Xylaria curta Fr., 1851 |
| Xylaria delicatula Starbäck, 1901 |
| Xylaria dichotoma (Mont.) Mont., 1856 |
| Xylaria digitata (L.) Grev., 1825 |
| Xylaria diminuta F. San Martín & J. D. Rogers, 1998 |
| Xylaria discolor (Berk. & Broome) Y.M. Ju, H.M. Hsieh, J.D. Rogers & Jaklitsch, 2012 |
| Xylaria duranii F. San Martín & Vanoye, 2001 |
| Xylaria enterogena Mont., 1856 |
| Xylaria enteroleuca (Speg.) P. M. D. Martin, 1970 |
| Xylaria entosulphurea J. D. Rogers, F. San Martín & Y. M. Ju, 1996 |
| Xylaria equina F. San Martín & Guevara, 1998 |
| Xylaria eugeniae F. San Martín, Vanoye & P. Lavín, 1998 |
| Xylaria feejeensis (Berk.) Fr., 1851 |
| Xylaria filiformis (Alb. & Schwein.) Fr., 1849 |
| Xylaria fockei (Miq.) Cooke, 1884 |