Saprolegnia - The iLumina Digital Library
Saprolegnia - The iLumina Digital Library
Saprolegnia - The iLumina Digital Library
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(1959a:214, fig. 77). DENMARK: A. Lund (1934:17); Petersen (1909a:381; 1910:521).<br />
GERMANY: de Bary (loc. cit., 1888:615); A. Fischer (1892:334); Minden (1912:526, 528,<br />
529; fig. lf); Pringsheim (loc. cit.). ICELAND: Seymour (1970:24, figs. 24-31). LAPLAND:<br />
Gäumann (1918:158). LATVIA: Apinis (1929a:210). MIDDLE EUROPE: Migula (1903:64,<br />
67). RUMANIA: Moruzi and Toma (1968: pl. 4, figs. 31, 32); Toma (1971:9, pl. 1).<br />
SWITZERLAND: Maurizio (locc. citt.; 1899:55); Tiesenhausen (1912:268 et sqq., figs. 2, 3).<br />
UNITED STATES: R. L. Butler (1975: figs. 21-24.); Kauffman (1908: pl. 23); Shipman<br />
(1977: fig. 14), USSR: Dudka and Logvinenko (1968:271, fig. 2.3); Naumov (1954:66).<br />
RECORDED COLLECTIONS: -- BRITISH ISLES: O’Sullivan (1965); Perrott<br />
(1960); Pickering et al. (1979); Willoughby (1974, 1977). DENMARK: Obel (1910a, b).<br />
GERMANY: Höhnk (1956a). ICELAND: Howard et al. (1970); T. W. Johnson (1968).<br />
INDIA: Khulbe (1977, 1980a); Khulbe and Bhargava (1977). NETHERLANDS: Bootsma<br />
(1973). ROMANIA: Toma (1969). UNITED STATES: Clausz (1970, 1974); Kauffman<br />
(1906); Klich (1980); Monsma (1936); Rooney and McKnight (1972); Shipman (1979).<br />
USSR: Érgashev and Kirgizhaeva (1978); Logvinenko (1971); Logvinenko and<br />
Meshcheryakova (1971); Osipyan et al. (1974). YUGOSLAVIA: Ristanović (1970a, 1973).<br />
SPECIMENS EXAMINED: -- BRITISH ISLES (1), L. G. Willoughby. ICELAND<br />
(4), RLS. NORWAY (1), TWJ.<br />
<strong>Saprolegnia</strong> irregularis Johnson and Seymour<br />
Svensk Bot. Tidskr. 69:90, figs. 1, 2. 1975<br />
(Figure 94 E-N)<br />
Monoecious. Mycelium dense, compact; hyphae sparingly branched. Sporangia<br />
clavate or cylindrical, irregular and secondary ones constricted in passage through exit<br />
pore of emptied sporangium, occasionally spherical or subspherical; renewed internally<br />
or infrequently in a cymose or sympodial manner; primary ones 60-381 x 17-33 µm.<br />
Spores dimorphic; discharge and behavior saprolegnoid; primary or secondary spore<br />
cysts 8-12 µm in diameter. Gemmae abundant; cylindrical, lobed, irregular, sparingly<br />
papillate, simple or branched; terminal or intercalary, single or catenulate; sometimes<br />
converting directly into oogonia. Oogonia terminal or intercalary; subspherical,<br />
cylindrical, branched, lobed, or irregular; (51-) 90-157 (-168) x (21-) 66-140 (-231) µm,<br />
including lobes or branches. Oogonial wall conspicuously pitted; smooth, except where<br />
wall substance protrudes through pits in a truncate fashion. Oospores centric or<br />
subcentric, very infrequently subeccentric; occasionally aborting; spherical,<br />
subspherical, or ellipsoidal; 1-40 per oogonium, and occasionally filling it; (l8-) 23-27 (-<br />
33) µm in diameter; germination not observed. Antheridial branches absent. Antheridia,<br />
when present, hypogynous, and often producing conspicuous unbranched or branched<br />
fertilization tubes; evidently proliferating internally, but successive ones may not have a<br />
poroid apex and are nonfunctional; fertilization tubes persisting.<br />
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