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Page number:223 
Remarks (internal):Collections on Oxyria and Rheum are morphologically indistinguishable from R. pratensis on Rumex. Biological specializations are not yet known. Some North American specimens on Rumex acetosella are distinguished by having very narrow conidia and are placed in a separate variety. 
Description type:Non-original description 
Description:Ramularia pratensis Sacc., Fungi ital. del., Tab. 998 (1881) and Michelia 2: 550 (1882) emend. U. Braun Fig. 499 A
var. pratensis
Syn.: = Ramularia rhei Allesch., Hedwigia 35: (34) (1896) [lectotype: on Rheum rhabarbarum L., Germany, Berlin, Steglitz, 7-9-1895, P. Sydow (M); isolectotype: B].
= Ovularia rumicis A. G. Eliasson, Bih. k. sv. Vet.-Akad., Handl. 22, Afd. 3, 12: 18 (1897) [holotype: on Rumex crispus L., Sweden, "Uplandia, ad Upsala", 2-8-1895, Eliasson (S)]. º Ramularia rumicis-crispi Sawada, Bull. Govt. Agric. Exp. Stat. Formosa 85: 89 (1943).
= R. oxyriae-digynae Gjaerum, Norw. J. Bot. 18(2): 110 (1971) [holotype: on Oxyria digyna (L.) Hill, Norway, Prov. Sogn, Fjordane, Tenal in Vik, 12-7-1965, Gjaerum (NPPI); paratype: O].
Lit.: Saccardo (1886: 215; 1899: 1063), Lindroth (1902: 13, 42), Magnus (1905: 542), Lindau (1907: 440, 443), Ferraris (1910: 796), Ja_evskij (1917: 281), Gonzáles Fragoso (1927: 105), Vasil'evskij & Karakulin (1937: 126-127), Vimba (1970: 39-41), Moro_kovs'kij et al. (1971: 132), Brandenburger (1985: 91), Ellis & Ellis (1985: 413, 416), CMI Descr. 853, 857 (1986), Sagdullaeva et al (1989: 210).
Ill.: Saccardo, Fungi ital. del., Tab. 998 (1881), Migula (1934: Pl. 121, Fig. 4), Gunnerbeck (1967: Pl. 1, Fig. 1), Ellis & Ellis (1985: Pl. 158, 159, Fig. 1646, 1650), CMI Descr. 853, 857, Fig. (1986).
Exs.: F. eston. exs. 291, 292. F. latv. exs. 100, 146. Kab. & Bub., F. imp. exs. 141, 438. Krieger, F. sax. 892. Mycoth. Ross. 344. Nevodovskij, Griby Rossii 189. Petr., Mycoth. gen. 1360. Rabenh., F. eur. 3186. Roum., F. gall. exs. 2061. Syd., Mycoth. germ. 47. Syd., Mycoth. march. 1682, 4390. Vestergr., Micromyc. rar. sel. 623.
Leaf spots amphigenous, subcircular or only slightly angular-irregular, 0.5-10 mm diam., yellowish-ochraceous, pale brown, finally greyish white, margin narrow to broad, dark, sometimes with a diffuse halo, reddish brown to purplish violet, occasionally somewhat zonate, patches sometimes confluent. Caespituli amphigenous, usually hypophyllous, punctiform to subeffuse, greyish white. Mycelium internal; hyphae hyaline, septate, sparsely branched, 1-4 ?m wide, forming small substomatal to intraepidermal stromata, composed of somewhat swollen hyphal cells, 2-5 ?m wide, hyaline. Conidiophores in small to moderately rich fascicles, occasionally solitary, arising from hyphal aggregations, through stomata or erumpent through the cuticle, loose, almost straight, subcylindric, filiform to geniculate-sinuous, simple, occasionally irregularly branched, (6-)10-60(-80) x 2-5 ?m, continuous to septate, hyaline, smooth; conidial scars somewhat thickened and darkened. Conidia catenate, occasionally in branched chains, narrowly ellipsoid-ovoid, subcylindric-fusiform, (6-)8-25(-35) x (1.5-)2-4(-5) ?m (rarely very narrow, only 1.5-2 ?m wide = var. angustiformis U. Braun & Rogerson), 0-3-septate, hyaline, smooth to faintly rough, ends obtuse to usually pointed; hila somewhat thickened and darkened.
Holotypus: on Rumex acetosa L., Italy, Padova, herb. Saccardo (PAD).
Host range and distribution: on Oxyria, Rheum, Rumex (Polygonaceae), Asia, Caucasus, Europe, N. and S. America - Oxyria digyna (L.) Hill (Europe, N, S), Rheum compactum L. (Central Asia, Kazakhstan), R. cordatum Losinsk. (Central Asia, Kazakhstan), R. crassinervium Fisch. (Europe, EW, botanical garden), R. franzenbachii Muet. (Europe, EW, botanical garden), R. officinale Baill. (Caucasus, Georgia; Europe, BG, D, IRL, RUS, Ukr.), R. palmatum L. (Europe, D), R. rhabarbarum L. (Asia, Far East of RUS, Siberia, Kazakhstan, S. Korea), R. rhaponticum L. (Europe, A, EW, H, LV, PL, RUS, S, SF; N. America, USA, CA, WA), R. spp. (Europe, DK, GB, SF, Ukr.), Rumex acetosa L. (Asia, China, Taiwan, S. Korea, Far East of RUS, Siberia, Kazakhstan, Turkmenistan; Caucasus, Armenia, Georgia; Europe, A, BG, D, DK, EW, F, GB, H, I, IRL, LT, LV, PL, RO, RUS, SF, SLO, Ukr.), R. acetosella L. (Europe, BG, EW, F, I, P, PL, RO, S, SF), R. alpestris Jacq. (Europe, A, CH, CZ, F, RO), R. alpinus L. (Caucasus, Armenia, Azerbaijan; Europe, F, RO), R. altissimus A. Wood (Caucasus, Armenia, botanical garden), R. aquaticus x hydrolapathum (Europe, S), R. confertus Willd. (Central Asia, Kazakhstan; Europe, RUS, Ukr.), R. conglomeratus Murr. (Europe, E, I, P), R. crispus L. (Asia, China, S. Korea, Far East of RUS; Caucasus, Armenia, Azerbaijan, Kabardino-Balkaria; Europe, E, F, I; N. America, USA, DE, KS; S. America, Argentina), R. hydrolapathum Huds. (Europe, GB, S), R. hymenosepalus Torr. (Caucasus, Armenia, botanical garden), R. induratus Boiss. & Reut. (Europe, P), R. longifolius DC. (Europe, RUS, S), R. maritimus L. (Asia, Far East of RUS; N. America, USA, WI), R. obtusifolius L. (Caucasus, Armenia, Georgia; Europe, A, E, EW, GB, RO, SF; N. America, USA, DE, WI), R. occidentalis S. Wats. (N. America, USA, AK), R. papillaris Boiss. & Reut. (Europe, P), R. pulcher L. (Europe, E, F, I, P, RUS, Crimea), R. patientia L. (Europe, BG), R. scutatus L. (Asia Minor, Iran; Europe, A, CH, CZ, D, E, F, H, I, P, PL, RO, TR), R. thyrsiflorus Fingerh. (Central Asia, Kazakhstan; Europe, LT, S, SF), R. tianschanicus Losinsk. (Central Asia, Kazakhstan), R. triangulivalvis (Danser) Rech. f. (Europe, LV), R. tuberosus L. (Caucasus, Armenia), R. spp. (Asia, Bhutan, Turkmenistan, Uzbekistan; Europe, GR, Ukr.; N. America, USA, DE, MD, WI).
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