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Page number:471 
Remarks (internal):In the original description, Wallroth (l.c.) cited E. populi DC. as synonym of his new species. Thus U. adunca is typified by the type of E. populi. The selected material is the only appropriate sample, preserved in de CandoIle's herbarium, which can be used for the lectotypification. 
Description type:Non-original description 
Description:Uncinula adunca (Wallr. ; Fr.) Lév., Ann. Sci. Nat., bot., 3 sér., 15, p. 151 (1851)
(a) var. adunca
Syn.: Alphitomorpha adunca Wallr., Verh. Ges. Naturf. Freunde Berlin 1, p. 37 (1819). Erysipke adunca (WalIr.) Fr., Syst. myc. 3, p. 245 (1829). E. salicis DC., Fl. Fr. 2, p. 273 (1805), type host - Salix daphnoides. Uncinula salicis (DC.) Wint., in Rabenh., Krypt.-Fl. 1, 2, p. 40 (1884). E. populi DC., Fl. Fr. 6, p. 104 (1815), type host - Populus spec. E. populi Pat., J. Bot. 2, p. 217 (1888), type host - Populus tremula. Alphitomorpha populi Wallr., Ann. Wetter. Ges. N. S. 4, p. 236 (1819). A. obtusata Schlecht., Ver. Ges. Naturf. Freunde BerIin 1, p. 50 (1819). E. obtusata (Schlecht.) Link, in L., Sp. Pl. 4, 6(1), p. 117 (1824). U. luculenta Howe, J. Bot. II, 1, p. 170 (1872), type host - Populus spec. U. keliciformis Howe, Bull. Torrey bot. Club 5, p. 4 (1874), type host - Populus balsamifera. U. columbiani Selby, Bull. Ohio Agric. Exp. Stat. (Tech. ser.) 1, p. 221 (1893), type host: on "Scutellaria," blown on or host misidentified. ? U. conidiigena Cocconi, Mem. R. Accad. Sci. Bologna, ser. V, X, p. 235 (1904), type host - Populus tremula. U. salicis var. epilobii Vestergr., Bot. Not., p. 256 (1897), type host- "Epilobium," blown on or host misidentified. U. salicis f. choseniae Bunkina (1967, p. 176). U. longispora Zheng & Chen, Acta Microbiol. Sinica 17(3), p. 204 (1977), type host-Populus maximowiczii. U. tenuitunicata Zheng & Chen, Acta Microbiol. Sinica 21(3), p. 305 (1981), type host - Populus nigra. U. longispora var. minor Zheng & Chen (l.c., p. 306), type host - Populus davidiana.
Ill.: Tulasne & Tulasne (1861, pl. 2, fig. 1); Léveillé (1851, pl. 7, fig. 15); Salmon (1900, pl. 3, fig. 62-63, pl. 5, fig. 85); Neger (1905,p. 127, fig. 21); Reed (1913, pl. 16, fig. 37); Clements & Shear (1931, pl. 7, fig. 1); Tai & Wei (1932,p. 110, fig. 17); Blumcr (1933,p. 367, fig. 147; 1967,p. 283, fig. 104); Homma (1937, pl. IX, fig. 5-7); Vasjagina et al. (1961, p. 306-309, fig. 100-102); Sandu-Ville (1967, p. 317, fig. 58); Morockovs'kij et al. (1969, p. 76, fig. 37); Benua & Karpova-Benua (1973, p. 139, fig. 69); Parmelee (1977,p. 1975, fig. 51-54); Zhao (1979,p. 104, fig. 58); Salata (1985,p. 175, fig. 70, pl. IV, X).
Lit.: Saccardo (1882,p. 7); Salmon (1900,p. 81); Neger (1905,p. 130); Jaczewski (1927,p. 383); Blumer (1933, p. 363; 1967, p. 283); Homma (1937, p. 356); Golovin (1960, p. 174); Vasjagina et al. (1961, p. 304); Junell (1967, p. 87); Sandu-Ville (1967, p. 315); Morockovs'kij et al. (1969, p. 76); Benua & Karpova-Benua (1973, p. 129); Khan et al. (1975, p. 200); Parmelee (1977, p. 1974); Bunkina (1979, p. 102); Zhao (1979,p. 103); Braun (1980a, p. 443; 1982e, p. 144); Salata (1985, p. 174).
Exs.: All. & Schn., F. bavar. 237. Ell., N. Am. Fung. 425. Ell. & Ev., N. Am. Fung. 3007. Fl. Exs. Austr. Hung. 3177. Fuck., F. rhen. 699, 700, 2236. Jacz., Kom., Tranz., F. Ross. Exs. 28. Klotzsch, Herb. viv. myc. 955. Rabenh., F. eur. 560,569,2316,2317. Rabenh., Herb. myc. 463-465. Rehm, Ascomyc. 549,550 b. Roum., F. gall. exs. 970. Sacc., Myc. ven. 615. Thüm., F. austr. 130-132,236. Thüm., Myc. univ. 959. Vestergr., Micromyc. rare. sel. 672.
Mycelium on leaves, amphigenous, effused or patches, sometimes confluent and covering the entire surface of the leaves, white, thin to moderately thick, evanescent to persistent, conidia formed singly, ellipsoid-cylindric (-ovoid), ca24-35 x 12.5-18 µm, germ tubes at an end of the spore, short, with lobed terminal appressorium. Cleistothecia gregarious or scattered, ca 95-170 µm in diam, cells irregularly polygonal to rounded, ca 8-20 µm diam, appendages very numerous, ± equatorial, ca (20-)40-80(-100) per ascocarp, rarely more, (0.75-)1-2 times as long as the cleistothecial diam, simple, straight to curved, stiff to flexuous, ca 4-11 µm wide throughout, width subequal throughout or occasionally slightly increasing upwards, hyaline, aseptate, rarely a single septum at the base, thin-walled throughout, smooth, occasionally somewhat rough below, apex closely uncinate-circinate or subhelicoid, apex not enlarged, sometimes even slightly attenuated towards the tip, ca 4-15 asci, shortly stalked, sometimes subsessile, 4590 x 25-55 µm, 3-6-spored, spores ellipsoid-ovoid, 18-30.5 x 10-18 µm. Pl. 221, fig. A.
Lectotypus: on Populus cf. nigra L., France, ex herb. De Candolle (G).
Hosts and distr.: on numerous host species of the genera Chosenia, Populus, Salix, Toisusu, Salicaceae; all Europe, nearly all Asia (from Iran to Central Asia, Siberia, China, Korea, Indian, Pakistan, Mongolia, Far East of the USSR, Japan), all North America (USA, Canada, Alaska).
 
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