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Page number:327 
Remarks (internal):It was not possible to study material on all recorded host species. The species is fairly common and widespread in Europe and Central Asia. It is, however, very rare in Japan (on Lonicera gracilipes var. glabra, TUAMH 2790). Some of the mentioned hosts are also known to be host species of M. magnusii.
Description type:Non-original description 
Description:Microsphaera lonicerae (DC.) Wint., in Rabenh., Krypt.-Fl. 1, 2, p. 36 (1884)
(a) var. lonicerae
Syn.: Erysiphe lonicerae DC., Fl. Fr. VI, p. 107 (1815). Alphitomorpha divaricata var. lonicerae Schlecht., Verh. Ges. Nat. Freunde Berlin 1, p. 49 (1819). E. divaricata var. lonicerae Link, in L., Sp. Pl. 4, 6(1), p. 113 (1824). E. penicillata var. lonicerae Fr., Syst. myc. 3, p. 244 (1829). Alphitomorpha penicillata var. caprifoliacearum Wallr., Fl. Crypt. Germ. 2, p. 754 (1833) p. p. E. penicillata var. caprifoliacearum (Wallr.) Rabenh., Deutsch. Krypt.-Fl. 1, p. 236(1844)p. p. M. dubyi Lév., Ann. Sci. Nat., bot., 3 sér., 15, p. 158 (1851), nom. superfl. M. penicillata var. lonicerae (Fr.) W. B. Cooke, Mycologia 44,p. 572 (1952).
Ill.: Léveillé (1851, pl. 9, fig. 26); Salmon (1900, pl. 1, fig. 19-20); Blumer (1933, p. 299, fig. 109; 1967, p. 257,fig. 89); GoIovin (1956b, p. 337, fig. 12); Sandu-Ville (1967, p. 268,fig. 47); Braun (1982b, p. 322, fig. 7; 1982d, p. 128, fig. 12 a); Gorlenko (1983, p. 45, fig. 12).
Lit.: Salmon (1900, p. 142); Jaczewski (1927, p. 322); Blumer (1933, p. 297; 1967, p. 257); Golovin (1956b, p. 337; 1960, p. 147); Vasjagina et al. (1961, p. 297); Junell (1967, p. 58); Moro?kovs'kij et aI. (1969, p. 81); Sandu-Ville (1967, p. 266); Eliade (1976, p. 206); Braun (1982d, p. 127); Salata (1985, p. 167).
Exs.: Briosi & Cav., F. paras. 71. F. exs. suec. 1482. Eriks., F. paras. scand. 144, 235. Kunze, F. sel. exs. 319. Neger, Forstschädl. PiIze 155. Rehm, Ascomyc. 847. Rabenh., Herb. myc. 473 p. p. Sacc., Myc. venet. 891. Syd., Myc. germ. 2521. Thüm., Myc. univ. 1056.
Mycelium on leaves, amphigenous, usually patches, thin or effused, evanescent or persistent, conidia formed singly, ± cylindric, sometimes ellipsoid, ca 25-35 x 11-15 µm (dried!), appressoria lobed, conidiophores straight, foot-cells ca 20-25 x 8-9 µm, followed by two somewhat shorter cells. Cleistothecia scattered or subgregarious, (60-)70-110(-120) µm in diam, cells obscure, irregularly polygonal or rounded, ca 10-20 µm diam, appendages equatorially arising, about 6-12 per ascocarp, 1-3 times as long as the cleistothecial diam, often flexuous, hyaline, coloured at the very base, sometimes coloured in the lower half of the stalk, thin-walled, thick-walled towards the base, aseptate or with 1-3 septa, smooth or rough below, about 6-9 µm wide, appendages straight to curved, sometimes irregularly bent, apex 3-5 times loosely and irregularly branched, branchings diffuse, wide, primary branches often elongated, sometimes closer and more regular, tips straight, not recurved, few tips occasionally recurved, asci 2-8, sessile or shortly stalked, 40-55 x 25-45(-50) µm, 3-6, mostly 4-5-spored, spores ellipsoid-ovoid, 15-25 x 8-15 µm. Pl. 103.
Holotypus: on Lonicera caprifolium L., France, "Erysiphe lonicerae, No. 503, Chaillet 1813," herb. de Candolle (G).
Hosts and distr.; on Lonicera (alpigena, altmanni, arborea, caprifolium, caucasica, coerulea, etrusca, fragrantissima, gracilipes var. glabra, iberica, implexa, karelini, korolkowii, microphylla, nigra, nummulariifolia, periclymenum, xylosteum), Caprifoliaceae; all Europe, Asia (Central Asia, Japan).
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