OEDOGONIUM aaa 
102. Oe. simplex Hirn. 
(PI. XXXVI, fig. 340.) 
1900, p. 158, Pl. XXIV, fig. 135. 
Monoecious; oogonium 1, obovoid-pyriform, operculate, division 
superior; oospore globose, ellipsoid or obovoid-globose, not filling 
oogonium, spore wall smooth; antheridium 1—?, subepigynous; sperms 2, 
division horizontal; vegetative cell 11-13X35-58y; oogonium 26-32 
33-40u; oospore (22—) 24-80 23-30u; antheridium 8-10 7-10u. 
Brazil: 
Cf. Oe. pyriforme (No. 100). 
103. Oc. pyrulum Wittrock. 
(Pl. XXXVI, fig. 349.) 
1872, p. 2; Hirn 1900, p. 158, Pl. XXV, fig. 136. 
Monoecious; oogonium 1, globose-pyriform, operculate, division 
superior; oospore subdepressed-globose or subglobose, not filling 
oogonium, spore wall smooth; antheridium 1, epigynous or hypogynous 
or rarely subepigynous; basal cell elongate; terminal cell apically 
broadly acute; vegetative cell 8-11 30-75y; oogonium 30-33 X 31-385y; 
oospore 26-29 X 24—28y; antheridium 8-9 X 10—11p. 
Sweden; Ceylon. 
108a. Var. amplius W. R. Taylor. 
(Pl. XXXVII, fig. 350.) 
1928, p. 107, Pl. 18, figs. 1-4 (as v. amplior). 
Larger oogonium; vegetative cell 9-12 40-64; oogonium 34-40 
30-44; oospore 26—28 X 26—-28y, not filling oogontum; antheridium sub- 
epigynous 10X6uz. 
British Columbia. 
Oe. pyrulum is separated from the species of the genus 
having pyriform or subpyriform oogonia largely by dimensions. 
The variety amplius has larger oogonia than the type and more 
nearly approaches the size of Oe. pyriforme (No. 100). 
104. Oe. loricatum Hirn. 
(Pl. XXXVI, fig. 339.) 
1895, p. 22, Pl. 1, fig. 6; 1900, p. 156, Pl. XXIV, fig. 133. 
Monoecious; oogonium 1 (rarely 2), subpyriform-globose, sometimes 
subglobose, operculate, division superior; oospore subglobose or sub- 
depressed-globose, quite filling oogonium, spore wall smooth; 
antheridium 1-2, subepigynous; sperms 2, division horizontal; vegetative 
cell 8-11 30-75u; oogonium 23-28 X23-40u; oospore 22-26 XK 21-24y; 
antheridium 7-8 X 5-7. 
Finland. 
This species is similar to Oe. pithophorae (No. 106) below, 
but the latter has globose and slightly larger oospores. 
