70 Prk OEDOGONTEACE LE 
13. Oe. plusiosporum Wittrock. 
(Pl. XII, fig. 122.) 
1874, p. 11; Wolle 1887, p. 72, Pl. 74, figs. 20 and 21; Hirn 1900, p. 84, Pl. II, 
fig. 17. 
Monoecious; oogonium 1, subglobose or subellipsoid-globose, with 
pore a little above median; oospore globose, rarely subglobose, not quite 
filling oogonium, spore wall smooth; antheridium to 6-seriate; sperm 
(?) 1; terminal cell obtuse; vegetative cell 12-1924—-77u; oogonium 
(28-) 34-45 X 35-50; oospore (25—) 80-39 X 30-39; antheridium 12-14 
<8-12u. 
United States: Pennsylvania, New Jersey, California; Colum- 
bia; British Columbia; Sweden, Finland, Rumania. 
See Oe. obsoletum above. 
14. Oe. tyrolicum Wittrock. 
(Pl. XII, fig. 123.) 
1874, p. 12; Hirn 1900, p. 91, Pl. IV, fig. 25; Heering 1914, p. 206, fig. 299; Collins 
1918, p. 65; Tiffany 1926, p. 99, Pl. VII, fig. 77. 
Monoecious; oogonium 1 (rarely 2), ellipsoid-globose or occasionally 
obovoid, pore nearly superior; oospore usually globose, not filling 
oogonium, spore wall smooth; antheridium 1-4; sperms 2, division 
horizontal; basal cell elongate; terminal cell apically obtuse; vegetative 
cell 15-24 & 45—-120u; oogonium 45-53 & 57—70u; oospore 40-48 XK 40-48y; 
antheridium 12-21 9-11y. 
United States: Massachusetts, Iowa; Austria. 
Distinguished by its more nearly ellipsoid oogonia and 
globose oospores. Separated from Oe. varians (No. 10) by its 
larger dimensions and from Oe. cardiacum var. carbonicum 
(No. 15c) by its monoecious habit. 
15. Oc. cardiacum (Hassall) Wittrock. 
(Pl. XIII, figs. 124 and 125.) 
Vesiculifera cardiaca Hass. 1845, p. 203, Pl. 51, fig. 4; Oe. cardiacum Wittr. 
1870, p. 135; Oe. lautumniarum Wittr. in Hirn 1896, p. 3; (2) Pringsheimia inaequalis 
Wood 1872, p. 195, Pl. 18, fig. 1; Hirn 1900, p. 85, Pl. III, fig. 19; Collins 1909, p. 231; 
Heering 1914, p. 194, fig. 273; Tiffany 1926, p. 89. 
Dioecious, macrandrous; oogonium usually 1, subglobose to sub- 
cordiform-globose, with a supramedian pore; oospore globose, not filling 
the oogonium, spore wall smooth; antheridium 1-10; sperms 2, division 
horizontal; basal cell elongate; terminal cell apically obtuse; female 
vegetative cell 18-3060-200u, male 15-25%45-170u; oogonium 
48-70 X 58-78; oospore 42-60 X 42-60u; antheridium 15-21 10-14u. 
United States: Iowa, Illinois, Pennsylvania, Oregon, Ohio, 
Connecticut; Africa; Paraguay; Ontario; Australia; England, 
Denmark, Finland, France, Germany, Switzerland, Sweden. 
