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Page number:235 
Remarks (internal):The status of "E. galeopsidis" on various host species of the Geraniaceae is uncertain. Maybe, this fungus represents a different specics. Prof. Zheng (Beijing, China) revised some Chinese samples, deposited in HMAS (on Erodium spec., Geranium pylzowiana and G. spec.). Dr. Simonian (Yerevan, Armenia) studied two samples collected in the USSR (on Geranium albiflorum, G. pratense, LE). Boesewinkel (1979) recorded E. galeopsidis on Geranium molle and G. homeanum from New Zealand. I reexamined a collection on Geranium sibiricum from Japan (SAPA). The cleistothecia as well as the anamorphs perfectly agree with E. galeopsidis.
Gorter (1985) described the structure of the conidial surface of E. galeopsidis (SEM studies). This feature distinguishes E. galeopsidis conidia from conidia of E. biocellata.
Description type:Non-original description 
Description:Erysiphe galeopsidis DC., Fl. Fr. VI, p. 108 (1815)
Syn.: Alphitomorpha lamprocarpa Wallr., Verh. Ges. Nat. Freundc Berlin 1, p. 33 (1819), type host - Ballota spec. E. lamprocarpa (Wallr.) Link, in L., Sp. Pl., ed. 4, 6(1), p. 108 (1824). Alphitomorpha communis var. labiatarum Wallr., Verh. Ges. Nat. Freunde Berlin 1, p. 31(1819). A. labiatarum Wallr., Ann. Wetter. Ges. N. F. 4, p. 241 (1819), type host-Lamium spec. E. labiatarum (Wallr.) Chev., Fl. gen. env. Paris, ed. 1, 1, p. 380 (1826). E. lamii (Rabenh.) Fuss, Arch. Ver. Siebenb. Landesk. N. F. 14(2), p. 461 (1878). E. ballotae (Rabenh.) Fuss (l.c.). E. matheranensis Viswanathan, Mycopath. mycol. appl. 9(2), p. 151 (1958), type host - Leucas stelligera. E. labiatarum f. ballotae (Wallr.) Jaczewski (1927, p. 157), f. chelonopsidis Jacz. (l.c., p. 158), ? f. clinopodii (Dietr.) Jacz. (l.c.), f. galeopsidis (Desm.) Jacz. (l.c.), f. glechomatis Jacz. (l.c., p. 159),f. lamii (Dietr.) Jacz. (l.c.), f. leonuri Jacz. (l.c., p. 160), f. marrubi Jacz. (l.c., p. 161),f. nepetae Jacz. (l.c.), f. origani Jacz. (l.c.), f. phlomidis Jacz. (l.c., p. 162), ? f. sideritidis Jacz. (l.c., p. 163), ? f. teucrii Jacz. (l.c., p. 164), ? f. thymii Jacz. (l.c.). E. labiatarum f. dracocephali Kuznecova, in Vasjagina et al. (1961, p. 160).
Anamorph: Oidium leucas-javanicae Sawada, Bull. Dept. Agr. Goyt. Res. Inst. Formosa 24, p. 22 (1927). O. leonuri-sibiricae Sawada (l.c., p. 24).
Ill.: Salmon (1900, pl. 7, fig. 127-129); Tai & Wei (1932, p. 94, fig. 2); Blumer (1933, p. 268, fig. 94; 1967, p. 195-196, fig. 60-61); Sandu-Ville (1961, p. 161, fig. 25); Benua & Karpova-Benua (1973, p. 134-135, ftg. 46-48); Zhao (1979, p. 67, fig. 32); Boesewinkel (1980, p. 177, fig. 1 B); Braun (1980c, p. 84, fig. 4 a); Zheng &Chen (1981b, p. 269, fig. 26); Gorter & Eicker (1983, p. 40, fig. 7-9); Salata (1985,p. 115, fig. 47, pl. VII).
Lit.: Saccardo (1882, p. 16); Salmon (1900, p. 204); Neger (1905, p. 114); Blumer (1933, p. 265; 1967, p. 195); Wei (1942, p. 104); Junell (1967, p. 31); Sandu-Ville (1967, p. 159); Benua & Karpova-Benua (1973, p. 106-107); Bunkina (1979, p. 61); Zhao (1979, p. 66); Boesewinkel (1979, p. 26); Zheng & Chen (1981b, p. 268); Gorter & Eicker (1983, p. 39); Salata (1985, p. 114).
Exs.: Brenkle, F. Dakot. 162. Calif. Fung. 1105. Crypt. exs. 3345. Eriks., F. paras. scand. 37 b. Fl. Rom. Exs. 303 b, c, 3009. Fuck., F. rhen. 654, 656. Krieger, F. sax. 1920, 2057, 2090. Migula, Crypt. Germ. Austr., Helv. exs. 281. Rabenh., F. eur. 1738, 1740, 1741. Roum., F. gall. exs. 2451. Sacc., Myc. ven. 612, 613, 902. Syd., Myc. germ. 2111. Syd., Myc. march. 336. Thüm., Myc. univ. 1254.
Mycelium on stems and leaves, amphigenous, white, dense, persistent or evanescent, patches or effused, often covering the entire surface of the leaves, hyphae ca 5-7.5 µm wide, conidiophores straight, foot-cells cylindric, moderately long, ca 25-50 x 8.5-12.5 µm, followed by 1-3 shorter cells, appressoria moderately lobed, conidia in chains, ellipsoid-ovoid to doliform, ca 25-36 x 13-22 µm. Cleistothecia gregarious or subscattered, ca (85-)100-160(-180) µm in diam, cells obscure, irregularly shaped, ca 6-20 µm diam, appendages numerous, in the lower half of the ascocarp, often forming a dense felt around the fruit bodies, mycelioid, interlaced with the mycelium and with each other, septate, thin-walled, smooth, hyaline to brown, usually simple, rarely irregularly branched, 0.25-2 times as long as the cleistothecial diam, often shorter than the cleistothecial diam, ca 3.5-8 µm wide, rarely exceeding, asci 5-16, sessile or shortly stalked, 40-80 x 20-45 µm, ascospores not developed before overwintering, asci always immature in the current season, overwintered asci (2-)3-6(-8)-spored, spores about 21-23 x 13.515.5 µm. Pl. 59, fig. A.
Lectotypus: on Galeopsis tetrahit L., France, "Erysiphe galeopsidis No. 233," herb. de Candolle (G).
Hosts and distr.: on numerous host species of various host genera of the Lamiaceae (on Ballota, Betonica, Chelonopsis, Clinopodium, Comanthosphace, Elsholtzia, Galeobdolon, Galeopsis, Glechoma, Isodon, Lagopsis, Lamium, Leonurus, Leucas, Lycopus, Marrubium, Melissa, Melittis, Monarda, Nepeta, Origanum, Phlomis, Physostegia, Plectranthus, Prunella, Rosmarinus, Salvia, Satureja, Scutellaria, Sideritis, Stachyopsis, Stachys, Thymus, Ziziphora), furthermore on Geranium (erianthum, homeanum, molle, pylzowiana, sibiricum, yesoense, spec.), Geraniaceae; nearly circumglobal, known from all Europe, Asia, Africa, North America and New Zealand.
Taxon name: