OED OGONTUM LT 
nearly filling oogonium, outer spore wall echinate; androsporangium 
_ 1-3; terminal cell obtuse; dwarf male slightly curved, on suffultory cell; 
antheridium exterior, 1; vegetative cell 17-2830-120u; oogonium 
38-48 X 45-654; oospore 37-46 43-554; androsporangium 17-18 
13-18; dwarf male stipe 10-11 X 22—25n; antheridium 6-8 X9-14y. 
United States: Pennsylvania; Finland, Germany, Sweden. 
123a. Var. canadense Tiffany. 
(Pl. XLII, fig. 418.) 
1929, p. 74; Oe. hystrix Wittr. in Skuja 1927, p. 99, Pl. II, fig. 13. 
Pore inframedian; suffultory cell enlarged; vegetative cell 14-25 
80-125u; suffultory cell 24-3064-72u; oogonium 40-53 52-64y; 
oospore 38-48 X 40-60u; androsporangium 16-20 15-30y; antheridium 
7-8 X 8-14u; dwarf male stipe 9-12 28-40u. 
British Columbia ; Latvia. 
123b. Var. subglobosum Wittrock. 
(Pl. XLII, fig. 419.) 
1872a, p. 22, Pl. 1, fig. 7; Hirn 1900, p. 214, Pl. XX XV, fig. 219. 
Smaller; oogonium and oospore subglobose; vegetative cell 17-21 
35-93u; oogonium 36-3841-43u; oospore 34-3639-40u; andro- 
sporangium 16-18X9-14y; dwarf male stipe 1023u; antheridium 
tex Ups: 
Sweden. 
The species is to be compared with Oe. hystricinum (No. 122). 
The variety canadense differs from the type in its inframedian 
pore and slightly swollen suffultory cell; var. subglobosum is 
smaller with subglobose oogonium. 
124. Oe. echinospermum Al]. Braun. 
(Pl. XLIII, figs. 420 and 421.) 
In Kuetzing 1849, p. 366; Kuetzing 1853, p. 12, Pl. 36, fig. 2; Wittr. 1870, p. 129; 
Hirn 1900, p. 199, Pl. XX XIII, fig. 204; P. B. A. No. 1673. 
Dioecious, nannandrous, gynandrosporous or idioandrosporous; 
oogonium 1, ellipsoid-globose or subglobose, pore median; oospore 
globose, quite filling oogonium, outer layer of spore wall echinate; 
androsporangium 1—5; dwarf male a little curved, on suffultory cell, 
antheridium exterior, 1-2; vegetative cell 18-3045-130u; oogonium 
39-50 X 41-57; oospore (with spines) 38-47 X 38—-49u; androsporangium 
21-25 X9-15u; dwarf male stipe 10-15 26-—35y; antheridium 6-12 
6-L5y. 
United States: Illinois, Ohio, Alabama, Mississippi, Massa- 
chusetts, New York, New Jersey, Pennsylvania, Michigan; 
Austria, Scotland, England, Germany, Latvia, Finland, France, 
Sweden; Australia; British Columbia. 
