OEDOGONIUM 145 
United States: Massachusetts; Austria, Denmark, England, 
Germany, Norway, Sweden. 
Cf. Oe. longicolle, above. 
170. Oe. danicum Hallas. 
(Pl. LIV, fig. 515.) 
1905, p. 404, fig. 10; Hirn 1906, p. 12, Pl. IV, fig. 24. 
Dioecious, nannandrous, gynandrosporous; oogonium 1, pyriform 
or pyriform-globose, operculate, division supramedian; oospore globose 
or depressed-globose, filling oogonium or not, spore wall smooth; 
androsporangium 1-3, hypogynous or scattered; dwarf male obovoid, 
unicellular, on suffultory cell or scattered; vegetative cell 4-7 K 20-82u; 
oogonium 21-23 X23-35u; oospore 19-20 15-204; androsporangium 
4-7 X7-12u; dwarf male 6-7 X 14-16u. 
Denmark. 
171. Oe. decipiens Wittrock. 
(Pl. LV, fig. 520.) 
1870, p. 126; Oe. vesicatum Link in De Bary 1856, p. 224, Pl. 5; Oe. rothii (Le 
Cl.) Pringsh. f. major West and West 1897, p. 5; Hirn 1900, p. 266, Pl. XLVI, figs. 
283 and 284; Collins 1909, p. 262; Heering 1914, p. 188, fig. 258; Tiffany 1926, p. 104, 
PI Vinb tie. 88: 
Dioecious, nannandrous, gynandrosporous; oogonium 1-3, sub- 
depressed globose, operculate, division median, rather narrow; oospore 
subdepressed or depressed-globose, almost filling the oogonium, spore 
wall smooth; suffultory cell not swollen; androsporangium 1-6, sub- 
epigynous, hypogynous, or scattered; dwarf male unicellular, usually 
on the oogonium; vegetative cell i 12 28-80u; oogonium 30-38 
27—40u; oospore 25- 34K 23- —28u; androsporangium 9— 10x8- 154; dwarf 
male 6-7 X 13-15y. 
United States: Michigan, Iowa, New Jersey; France, Ger- 
many, Sweden, England; Africa. 
171a. Form dissimile Hirn. 
(Pl. LV, figs. 521 and 522.) 
1900, p. 267, Pl. XLVI, fig. 285. 
Gynandrosporous; vegetative cells evidently capitellate, 8-11x 
25-65; oogonium 28-35 X 23-38u; oospore 23-34 X 21-30u; androspor- 
angium 8-9 X6—-10u; dwarf male 5-6 X 11-14uy. 
United States: Michigan; Brazil. 
171b. Var. africanum Tiffany. 
(Pl. LV, figs. 623 and 524.) 
1929, p. 74; Oe. decipiens Wittr. forma im West and West 1897, p. 5, and im Hirn 
1900, p. 267, Pl. XLVI, fig. 284. 
Smaller and idioandrosporous; vegetative cell 8-13 25-60y; 
oogonium 25-32 24-32u; oospore 24-30 23-28u; androsporangium 
7-11X9-13u; dwarf male 6-7 X9-12u. 
Africa. 
