Milesina polypodii (F.B. White) Aime & Rossman, in Aime, Castlebury, Abbasi, Begerow, Berndt, Kirschner, Marvanova, Ono, Padamsee, Scholler, Thines & Rossman, IMA Fungus 9(1): 83 (2018)

Bubner, Ben, Buchheit, Ramona, Friedrich, Frank, Kummer, Volker & Scholler, Markus, 2019, Species identification of European forest pathogens of the genus Milesina (Pucciniales) using urediniospore morphology and molecular barcoding including M. woodwardiana sp. nov., MycoKeys 48, pp. 1-40 : 1

Milesina polypodii (F.B. White) Aime & Rossman, in Aime, Castlebury, Abbasi, Begerow, Berndt, Kirschner, Marvanova, Ono, Padamsee, Scholler, Thines & Rossman, IMA Fungus 9(1): 83 (2018) Figure 6m

Polypodium interjectum Shivas. France, Alsace: Wasselnheim, Wangenberg, 23 Oct 1914, A. Ludwig, II (W, 1916-3467); way Fischboedle to Hohneck, 3 Jul 1910, H. Sydow, II (S, F310825); Potigny (Calvados), Bréche-au-Diable, 14 Apr 1911, R. Maire, II (W, 1912-3055; B, B 700016502); Germany, Nordrhein-Westfalen: Märkischer Kreis, Balve, Volkringhausen, moist forest, 16 Aug 2012, H. Thiel, II (KR, KR-M-0043189).

P. x mantoniae Rothm. & U. Schneid. ( P. vulgare L. × P. interjectum Shivas). Germany, Niedersachsen: Northeim, SO Vorwerk Levershausen, Langfast Kopf, broadleaved forest, sandstone, 16 Jan 2014, H. Thiel, II (KR, KR-M-0043177).

P. vulgare L. Germany, Baden-Württemberg: Schwarzwald, Ortenau, Lautenbach, Lautenfelsen, 5 Jun 2017, M. Scholler & A. Rubner, II (KR, KR-M-0048694); Schwarzwald, Ortenau, Ottenhöfen, slope near creek, next to Abies alba , 13 Nov 2017, M. Scholler & R. Buchheit (KR, KR-M-0049181); Schwarzwald, Ortenau, Ottenhöfen, scarp near stream, coniferous forest next to Abies alba , 13 Nov 2017, M. Scholler & R. Buchheit (KR, KR-M-0049179); Hessen: Hessisch Lichtenau, Hoher Meißner, border area of an open “Basaltblockhalde”, 13 Mar 2014, H. Thiel (KR, KR-M-0043161); Niedersachsen: Ammerland, Bad Zwischenahn, Ofen, mixed forest, 11 Apr 2017, R. Jarling, II (KR, KR-M-0048818); Lüchow-Dannenberg, Höbeck, beech-oak forest, 22 Dec 2013, H. Thiel, II (KR, KR-M-0043146); Rheinland-Pfalz: Bad Kreuznach, Hochstetten-Dhaun, Simmerbachtal near Dhaun castle of Dhaun, 30 Oct 2013, H. Thiel (KR, KR-M-0043152); Schleswig-Holstein: Nordfriesland, Nebel, pine forest, 15 Oct 2014, H. Thiel (KR, KR-M-0043173); Sachsen: Schmilka, Großer Winterberg, 26 Aug 1903, H. & P. Sydow (Sydow & Sydow, Mycoth. germ. 62; W, 1903-13407; S, F29305, type); Schmilka, Großer Winterberg, Aug 1903, H. & P. Sydow (S, F29306, F29307, type); Sachsen-Anhalt, Quedlinburg, Thale, unteres Bodetal, beneath Hexenplatz, 17 Jul 2014, H. Thiel (KR, KR-M-0043157); Thüringen, Eisenach, SSW Wartburg, NNW Eisenacher Burg, 25 May 2012, H. Thiel (KR, KR-M-0043190); Great Britain, Wales: Harlech, 4 Jan 1927, P.G. M. Rhodes (W, 1975-15143, 1973-22169, 1973-22320); Romania, Vîlcea: Muntele Cozia, Omu, 1 Jul 1976, G. Negrean, II (W, 1980-00055); Switzerland, Neuenburg: Gorgier, Creux du Van, 19 Oct 1913, E. Mayor, II (W, 1914-9288); Neuchâtel, Bois, Tête-Plumée, 5 Nov 1909, E. Mayor, (Vestergren, Micromyc. rar. sel. praec. Scand. 1702, W, 1914-9287, 1973-17308,); Neuchâtel, Tête-Plumée, 20 Oct 1913, E. Mayor, II (W, 1915-5830).

Description.

Urediniospores hyaline, ellipsoidal, obovoidal to subglobose, 26.5-42.5 × 15.0-25.0 µm, mostly 30.0-40.0 × 17.5-22.5 µm; wall 0.5-2.5 µm, mostly 0.5-1.0 µm thick; spores echinulate with 1-2, mostly 1 ovoidal smooth area, typically located centrally, smooth area 15.0-22.5 × 6.3-11.3 µm, mostly 15.0-17.5 × 7.5-10.0 µm, spines 1.8-2.8 µm, mostly 1.8-2.2 µm long, irregularly distributed, erect, spines denser toward spore base, distances 0.5-7.0 µm, mostly 1.0-4.0 µm, spine base 0.7-1.6 µm, mostly 0.9-1.2 µm diam.; germ pores scattered, 4-10, mostly 5-6, 1.3-3.8 µm, mostly 2.0-2.5 µm diam., Ø 2.3 µm diam.