OEDOGONIUM 163 
= * 
207. Oe. flexuosum Hirn. 
(Pl. XL, fig. 394. ) 
1900, p. 318, Pl. XLVIII, fig. 310. 
Oogonium 1, obovoid or obovoid- Blonece operculate, division 
superior; oospore same form as oogonium and filling it, spore wall 
smooth; filament irregularly curved; vegetative cell 15-18 X12-32u;- 
oogonium 29-34 X 29-43; oospore 27-32 27-37 pu. 
Ireland. 
Characterized by its curved filaments and short cells. 
Cf. Oe. fonticola (No. 208) and Oe. implexum (No. 187). 
208. Oc. fonticola Al. Braun. 
(Pl. XLI, fig. 402.) 
In Kuetz. 1849, p. 368, and 1858, p. 13, Pl. 40, fig. 2; Oe. rhodosporum (Welw.) 
Wittr. 1876, p. 47; Hirn 1900, p. 313, Pi, LUX: fig. 315: Heering 1914, p. 225, fig. 
341; Tiffany 1926, p. 106. 
Dioecious; oogonium 1-2, obovoid or globose-obovoid, operculate, 
division superior; oospore obovoid-ellipsoid or subglobose, nearly or 
quite filling oogonium, spore wall smooth; vegetative cell 16-32X 
12-70y; oogonium 36-43 (-45) *48-56u; oospore 34-41 (-43) x 40-49u. 
United States: Iowa, Indiana, Mississippi; Austria, Italy, 
Spain, Germany, England. 
Cf. Oe. implexum (No. 187), Oe. flexuosum (No. 207), and 
Oe. pluviale (No. 183). 
West (1912) records the presence of very small apparently 
male filaments of Oe. fonticola, indicating a condition intermed- 
iate between ‘‘truly dioecious macrandrous species and those 
with large nannandria.’’ If these are really male filaments, 
the species becomes dioecious, macrandrous. Until the data 
are more complete, Oe. fonticola must remain in the imperfect- 
ly known division of the genus. 
209. Oe. oryze Wittrock. 
(Pl. XXI, fig. 190.) 
1876, p. 51, Pl. 13, figs*32 and 33; Hirn 1900, p. 294, Pl. XXII, fig. 118. 
Oogonium 1-2, scarcely tumid, subobovoid or subcylindric, pore 
superior; oospore of same form as oogonium, nearly filling it or some- 
times enlarging it, spore wall smooth; basal cell elongate; terminal 
cell acuminate; vegetative cell 24-39X36-120y; suffultory cell 45x 
56-90u; single or upper series of oogonium 45-55X65-95u; lower 
series of oogonium 43-53 X 45-57; oospore 41-51 (44—) 60-80u. 
United States: Mississippi; Italy. 
