Table 1.List of examined Microbotryum specimens, with host plants, GenBank accession numbers, spore size range, mean spore sizes with standard deviation and reference specimens.

Species	Host plants	GenBank acc. no.	Spore size range (μm)	Mean spore size with standard deviation (μm)	Reference specimens1
Microbotryum coronariae	Lychnis flos-cuculi	ITS: KC684887 LSU: KC684886	Not analysed	Not analysed	Germany, Bayern, Allgäu, Ks. Oberallgäu, Oberjoch, Kematsriedmoos, Westteil, ca. 1150 m a.s.l., 25 Jun. 2008, M. Scholler, KR-M-23797
Microbotryum coronariae	Lychnis flos-cuculi	2ITS: AY877417 LSU: KC684885	Not analysed	Not analysed	Norway, Kristiansund, Farstad, 14 Aug. 2002, M. Lutz, TUB 012115
Microbotryum silenes-saxifragae	Silene saxifraga	–	6.5–9.5(−10.5) × 6.0–8.5	7.6 ± 0.9 × 7.1 ± 0.6	Austria, Carinthia, Karawanken, 7 km WSW of Bad Eisenkappel, Trögern valley, 22 Jul. 1962, H. Teppner, KR-M-34470 (Dupla Graecensia Fungorum 237)
Microbotryum silenes-saxifragae	Silene saxifraga	ITS: AY588102 LSU: JN000077	5.5–8.5(−9.5) × 5.0–6.5(−7.0)	6.7 ± 0.8 × 6.0 ± 0.5	Austria, Carinthia, Villach, Finkenstein, Kanzianiberg, 18 Jun. 2003, M. Lutz, TUB 11791
Microbotryum silenes-saxifragae	Silene saxifraga	ITS: JN000073 LSU: JN000079	5.0–8.5 × 5.0–8.0	6.7 ± 0.8 × 6.2 ± 0.6	Austria, Carinthia, Villach, Finkenstein, nort of Kanzianiberg, 7 Jul. 2005, M. Lutz, KR-M-23889
Microbotryum silenes-saxifragae	Silene saxifraga	ITS: JN000071 LSU: JN000075	5.0–8.0(−9.0) × (4.5−)5.0–7.5	6.6 ± 0.8 × 6.1 ± 0.8	Austria, Carinthia, Villach, Finkenstein, southern part of the Kanzianiberg, near the church, 24 Jun. 2006, M. Lutz, KR-M-23890 – holotype
Microbotryum silenes-saxifragae	Silene saxifraga	–	(5.5−)6.0–7.5(−8.5) × 5.0–7.5	6.8 ± 0.6 × 6.2 ± 0.6	France, Central Pyrenees, rocks between Gavarnie village and Cirque de Gavarnie, 11 Jul. 1961, S. Batko, KRAM 1762
Microbotryum silenes-saxifragae	Silene saxifraga	ITS: JN000074 LSU: JN000078	5.5–7.5 × 5.0–6.5(−7.0)	6.4 ± 0.5 × 5.8 ± 0.5	Germany, Baden-Württemberg, Tübingen, Botanical Garden, cultivated (originating from Slovenia, Bovec, Vas na Skali, 17 Jul. 1994), 11 Jun. 1999, C. Vánky & K. Vánky, H.U.V. 19570
Microbotryum silenes-saxifragae	Silene saxifraga	–	6.0–7.5 × 5.5–7.5	6.7 ± 0.4 × 6.3 ± 0.5	Germany, Baden-Württemberg, Tübingen, Botanical Garden, cultivated (originating from Slovenia, Bovec, Vas na Skali, 17 Jul. 1994), 24 May 2011, M. Lutz, KRAM F-49439
Microbotryum silenes-saxifragae	Silene saxifraga	–	6.5–8.5(−9.5) × 6.0–8.0	7.4 ± 0.7 × 6.9 ± 0.5	Italy, Tridentum, Doss Trento, 25 May 1893, Evers, KRAM 1760
Microbotryum silenes-saxifragae	Silene saxifraga	–	6.0–8.0(−8.5) × 6.0–7.5	7.0 ± 0.5 × 6.5 ± 0.5	Italy, Alpi Maritime, Valle de Gosso, 7 Jun. 1992, M. Schubert, KR-M-23949
Microbotryum silenes-saxifragae	Silene saxifraga	ITS: JN000072 LSU: JN000080	6.0–8.5(−9.5) × 5.5–8.5(−9.0)	7.0 ± 0.8 × 6.5 ± 0.8	Montenegro, Dinaric Alps, Durmitor Mts, along trail Sedlo-Bobotov Kuk, Surutka valley, 10 Aug. 2009, A. Ronikier & M. Ronikier, KRAM F-49440
Microbotryum silenes-saxifragae	Silene saxifraga	–	6.5–8.5(−9.5) × (5.5−)6.0–7.5(−9.0)	7.3 ± 0.7 × 6.8 ± 0.6	Slovenia, Carniola, “Schibeneggergraben bei Ratschach”, 3 Jun. 1885, J.C. Eques Pittoni a Dannenfeldt, KRAM 108297
Microbotryum silenes-saxifragae	Silene saxifraga	ITS: AY588101 LSU: JN000076	5.5–7.5 × (4.5−)5.0–6.5(−7.0)	6.7 ± 0.5 × 6.2 ± 0.5	Slovenia, Bovec, Trenta, Juliana Alpine Botanical Garden, cultivated, 7 Aug. 2001, D. Begerow & M. Lutz, TUB 11790

¹H.U.V. – Herbarium Ustilaginales Vánky, Gabriel-Biel-Str. 5, D-72076 Tübingen, Germany; KR-M – Mycological Herbarium of the Staatliches Museum für Naturkunde Karlsruhe, Germany; KRAM – Phanerogamic Herbarium of the W. Szafer Institute of Botany, Polish Academy of Sciences, Kraków, Poland; KRAM F – Mycological Herbarium of the W. Szafer Institute of Botany, Polish Academy of Sciences, Kraków, Poland; TUB – Herbarium of the Eberhard-Karls-Universität Tübingen, Germany.

²Taken from Lutz et al. (2005).