Milesina blechni (Syd. & P. Syd.) Syd. & P. Syd., Annales Mycologici 8(5): 491 (1910)

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 blechni (Syd. & P. Syd.) Syd. & P. Syd., Annales Mycologici 8(5): 491 (1910) Figure 6a, b

Struthiopteris spicant (L.) Weiss ( Blechnum spicant (L.) Sm.), Czech Republic, Mähren: Hochgesenke, Großer Kessel ( Velká kotlina), 19 Mar 1923, F. Petrak, II (W, 1970-25718); Hochgesenke, Großer Kessel ( Velká kotlina), 3 Sep 1923, F. Petrak, II (W, 1992-14461); Denmark: 26 Nov 1926, J. Lind, II (W, 1975-19656); 26 Nov 1926, J. Lind, II (W, 1931-7888); France, Alsace: Frankental, Hohneck, 16 Jul 1910, H. Sydow, II (Sydow, Mycoth. Germ. 877; W, 1910-6976, 1973-30378; S, F310830); Germany, Bayern: Aschau, 25 Aug 1934, E. Eichhorn & H. Poeverlein, II (W, 1975-15534); Dreisessel, 12 Oct 1940, E. Eichhorn, II (Sydow, Mycoth. germ. 3449; W, 1942-2122m 1972-17207); Baden-Württemberg, Schwarzwald, St. Georgen, Aug 1913, P. Sydow (Sydow, Uredineen 2739; GLM, GLM-53029; W, 1916-4273; S, F310826); Schwarzwald, path between Bad Wildbad and Kaltenbronn, 13 Aug 1910, P. Sydow, II (S, F310827); Freudenstadt, Baiersbronn, NSG "Wilder See- Hornisgrinde", coniferous wood, 1 Mar 2014, M. Scholler, II (KR, KR-M-0038516); Schwarzwald, Ortenau, Durbach, Tiefenspring, Großer Langenbach, 15 Sep 2017, R. Buchheit (KR, KR-M-0049039); Schwarzwald, Ortenau, Seebach, coniferous forest, 1 Mar 2014, M. Scholler (KR, KR-M-0038517); Schwarzwald, Rastatt, Forbach, Herrenwieser See, wayside, 15 May 2014, M. Scholler (KR, KR-M-0038519); Schwarzwald, Rastatt, Forbach, Herrenwies, spruce-fir forest, 15 May 2014, M. Scholler, II (KR, KR-M-0038523); Hamburg: Harburg, Klecker Wald, 12 May 1915, O. Jaap (Jaap, Fungi sel. exs. 774; W, 1916-4246); Niedersachsen: Harz, Rehberger Graben, between Oderteich and St. Andreasberg, 24 Aug 1904, P. Sydow, II (Sydow, Mycoth. Germ. 311; S, F310828; W, 1905-4478); Sachsen: Schmilka, Großer Winterberg, 28 Aug 1903, H. and P. Sydow, II (Sydow, Uredineen 1841; B, B 700016503; S, F29283, F310855; W, 1904-006026, type); Schmilka, 28 Aug 1903, H. & P. Sydow, II (H. & P. Sydow, Mycoth. Germ. 61; W, 1903-0013406; S, F29284, type); Schmilka, Großer Winterberg, 28 Aug 1903, P. Sydow, II (S, F29285, type); Thüringen, Stützerbach near Ilmenau, 20 Jul 1911, O. Jaap, II (W, 1911-7479); Eichsfeld, Fretterode Schierbachtal, spruce forest, 14 Nov 2013, H. Thiel, II (KR, KR-M-0043148); Nordrhein-Westfalen, Lennestadt, Forsthaus Einsiedelei, forest, 5 Sep 1919, A. Ludwig, II (W, 1975-12517); Nordrhein-Westfalen: Lennestadt, Forsthaus Einsiedelei, forest, 31 Aug 1921, A. Ludwig, II (W, 1973-16286); Olpe, Forsthaus Einsiedelei, forest, 31 Aug 1921, A. Ludwig, II (W, 1926-23840); Olpe, Silberg, 12 Aug 1931, A. Ludwig, II (W, 1973-17007); Olpe, Silberg, 6 Sep 1940, A. Ludwig, II (W, 1975-20448); Poland, Riesengebirge (Karkonosze): Karpacz (formerly Krummhübel), 29 Aug 1908, H. Sydow, II (S, F310856); Karpacz (formerly Krummhübel), Hoserweg, 29 Aug 1908, H. Sydow, II (S, F310829); Romania: Brasov, mountain chain Fagaras, Valea Sâmbetei, northern Cabana Valea Sâmbetei, Piceetum, 17 Aug 1983, G. Negrean, II (W, 1997-00694); Switzerland, Berner Oberland: Längenbalm, Hasleberg, 3 Sep 1906, E. Fischer, II (B, B 700016504, W, 1907-17136); Bern, Wälde, northern side of the Schwendelberg, next to Guggisberg, 27 Aug 1923, E. Fischer, II (W, 1971-30213).

Description.

Urediniospores hyaline, ellipsoidal to obovoidal, clavate, 27.5-42.5 × 15.0-20.0 µm, mostly 30.0-37.5 × 15.0-19.0 µm; wall 0.5-1.5 µm, mostly 0.8-1.0 µm thick; echinulate without spine-free areas, spines 1.2-2.2 µm, mostly 1.5-2.0 µm long, irregularly distributed, sometimes also in rows, spines typically straight and perpendicular to the wall, distance between spine bases 1.0-5.0 µm, mostly 1.5-4.0 µm, spine base 0.7-1.3 µm, mostly 0.9-1.1 µm diam.; germ pores scattered, 6-13, mostly 10-11, 2.0-3.0 µm diam., Ø 2.4 µm diam.

Comment.

Urediniospore features are very similar to those of M. kriegeriana . Average urediniospore length measurements are somewhat higher (30.0-37.5 vs. 27.5-35.0 in M. kriegeriana ).