42 ree, Or DiC GO NAC EAlun 
oogonia 52-60 X 42-51; oospores 50-58 X 40-48u; androsporangia 13-15 
X 14-16; dwarf male stipes 9-11 32—44u; antheridia 8-9 X 21—24u. 
United States: Ohio; Germany, Austria, Switzerland. 
The outer oospore wall of this species is recorded by Hirn 
as doubtfully smooth. Material collected in Ohio in 1920 
showed the wall to be scrobiculate, and the description is 
emended accordingly. 
29. B. valida Wittrock. 
(Pl. IV, fig. 27.) 
1872, p. 17, Pl. 1, fig. 1; 1874, p. 48; Hirn 1900, p. 346, Pl. LVI, fig. 357; Heering 
1914, p. 238, fig. 372; Tiffany 1928, p. 144, Pl. XVII, fig. 27. 
Dioecious, nannandrous, gynandrosporous; oogonia depressed 
globose, patent, below terminal setae; division of suffultory cell about 
median; outer oospore wall scrobiculate; androsporangia scattered, 
1-3; dwarf males on oogonia, antheridia interior, stipe a little longer 
than antheridium, curved; vegetative cells 23-2746-95u; oogonia 
59-70 X48-56u; oospores 57-68X46-54u; androsporangia 18-20 
10-144; dwarf male stipes 9-1023-29 (40) uw; antheridia 11-12 
20—22 tu. 
United States: Michigan; Finland, Sweden. 
30. B. quadrata Wittrock. 
(Pl. II, fig. 22.) 
1872, p. 19, Pl. 1, fig. 3; 1874, p. 45; Hirn 1900, p. 338, Pl. LV, fig. 348; Heering 
1914, p. 236, fig. 365; Tiffany 1928, p. 144, Pl. XVI, fig. 22. 
Dioecious, nannandrous, gynandrosporous; oogonia subdepressed 
(subquadrangularly) globose, patent, below androsporangia; division of 
suffultory cell inframedian (rarely nearly median); outer oospore wall 
scrobiculate; androsporangia 1—2, epigynous, rarely scattered; dwarf 
males on oogonia, antheridia interior, stipe a little curved, shorter than 
antheridium; vegetative cells 19-25 30-50u; oogonia 40-50 40—45y; 
oospores 38-48 X38—48u; androsporangia 15-17 X11—12u; dwarf males 
LO=I2> 27 S20. 
United States: Ohio; Finland, Sweden. 
31. B. congener Hirn. 
(Pl. V, figs. 33 and 34.) 
1900, p. 346, Pl. LVII, fig. 358; Tiffany 1926, p. 108, Pl. X, figs. 111 and 112; 
Tiffany 1928, p. 144, Pl. XVIII, figs. 33 and 34. 
Dioecious, nannandrous, idioandrosporous; oogonia depressed- 
globose or more rarely oboviform-globose, patent, below terminal setae; 
division of suffultory cell inframedian; outer oospore wall scrobiculate; 
androsporangia 1-4; dwarf males a little shorter than the oovonia on 
which they develop; antheridia interior, stipe about twice as long as the 
antheridial cell, curved; vegetative cells 21-2440-75y; oogonia 
44-54 X 40-48; oospores 42-52 * 38-46; androsporangial cells 13-15 X 
10-131; dwarf males 9-10 K 29-34; antheridial cells 10-11 X 14-17u. 
United States: Iowa; South America. 
