OEDOGONIUM. 15 il 
United States: California; Austria, England, France, Spain, 
Germany, Hungary, Italy, Ireland, Switzerland, Sweden; Siam. 
This species is the Oe. diplandrium Juranyi rather widely 
copied in morphological texts. It is characterized by its short 
vegetative cells, clustered unicellular dwarf males, and compact 
and numerous antheridia. It bears some resemblance to the 
imperfectly known Oe. fonticola (No. 208). 
184. Oe. macrandrium Wittrock. 
(Pl. LVH, fig. 549.) 
1870, p. 130, Pl. 1, figs. 3-5; Hirn 1900, p. 233, Pl. XX XIX, fig. 240; Collins 
1909, p. 258; Heering 1914, p. 180, fig. 248; Tiffany 1926, p. 106, Pl. IX, fig. 97. 
Dioecious, nannandrous; oogonium 1-4, globose-ovoid, operculate, 
division superior; oospore globose, rarely ovoid-globose, not completely 
filling the oogonium, spore wall smooth; terminal cell obtuse or very 
shortly apiculate; dwarf male on or near the oogonium, stipe much 
curved, sometimes 2-3 celled; antheridium 1-7; vegetative cells 15-20 
45-1004; oogonium 36-42 43-54u; oospore 31-37 X33-39u; dwarf 
male stipe 12-13 X 24-33u; antheridium 9-10 7-10y. 
United States: Ohio, Iowa, Massachusetts, Pennsylvania; 
England, Finland, France, Germany, Denmark, Norway, 
Sweden, Switzerland. 
184a. Form acuminatum Hirn. 
(Pl. LVI, fig. 550.) 
1900, p. 234, Pl. XX XIX, fig. 241. 
Dwarf male apically broadly acute; vegetative cell 15-19 30-80u; 
oogonium 37-45 43-554; oospore 35-40 36-454; dwarf male stipe 
11-15 X 24-35u; antheridium 9-13 9-13y. 
Sweden. 
184b. Form aemulans Hirn. 
(Pl. LVH, fig. 551.) 
1906, p. 43; Oe. macrandrium Wittr. var. aemulans Hirn 1900, p. 235, Pl. XX XIX, 
fig. 242; (2?) Oe. lundense Wittr. in Wolle 1887, p. 79, Pl. 77, figs. 9 and 10. 
Vegetative celi 10-15 22-90u; oogonium 28-40 33-45u; oospore 
26-36 X 26-364; dwarf male stipe 9-12 20-25u; antheridium 8-9X 
8-10u. 
United States: Pennsylvania, California, Michigan, Illinois, 
Mississippi; Brazil. 
184c. Form lundense (Wittrock) Hirn. 
(Pl. LVII, fig. 552.) 
1906, p. 42, Pl. III, fig. 19; Oe. lundense Wittr. 1872, p. 4, and 1874, p. 23; Oe. 
age Wittr. im Hirn 1900, p. 237, Pl. XL, fig. 245; Oe. fonie Hallas 1905, p. 401, 
g. 6. 
Oogonium subobovoid-globose; oospore wall sometimes thick; 
vegetative cell 13-21 X 13-50u; oogonium 31—40 (-45) «34-48u; oospore 
