BULBOCH AE TE 45 
37. B. rectangularis Wittrock. 
(Pl. VI, fig. 43.) 
1870, p.-142; 1874, p. 55; (?) B. ignota Wood 1872, p. 201; Hirn 1900, p. 359, 
Pl. LX, fig. 376; Collins 1909, p. 273; Heering 1914, p. 239, fig. 376; Tiffany 1928, 
Dela (aeP le exe he 45 PB. AL No:-5o16: 
Dioecious, nannandrous, gynandrosporous; oogonia ellipsoid, patent 
or more rarely erect, below terminal setae or androsporangia or more 
rarely vegetative cells; outer oospore wall! longitudinally ribbed; andro- 
sporangia scattered or epigynous, 1—?; dwarf males near or occasionally 
on oogonia; antheridia exterior, 1-4; vegetative cells, subrectangular in 
cross section, 16-23 X 20-46u; oogonia 32-39 X 45-63; oospores 29-37 X 
43-61u; androsporangia 13-16X10-27u4; dwarf male stipes 14-18 
22-27; antheridia 8-10 X5-7u. 
United States: Pennsylvania, Ohio, Illinois, Michigan, 
Massachusetts, Rhode Island, Connecticut; Europe, Patagonia, 
Mongolia. 
This species is usually characterized by its long and few 
branches and its nearly rectangular cells in cross section. 
37a. Var. hiloensis Nordstedt. 
(Pl. VI, fig. 44.) 
1878, p. 22; Hirn 1900, p. 361, Pl. LX, fig. 377; Collins 1909, p. 274; Tiffany 1928, 
p. 147, Pl. XIX, fig. 44. 
Smaller, androsporangia generally epigynous; vegetative cells 
14-19 X 2448y; oogonia 28-32 X 47-51; androsporangia 12-14 XK 13-16y; 
dwarf male stipes 13-14 22—24u; antheridia 8-9 x 5-7u. 
Australia; (?) Pennsylvania (U.S. A.). The only American 
record is that of Wolle. 
38. B. varians Wittrock. 
(Pl. VI, fig. 48.) 
1870, p. 143; 1874, p.53; Hirn 1900, p. 357, Pl. LIX, fig. 373; Heering 1914, p. 239, 
fig. 375; Tiffany 1926, p. 109, Pl. X, fig. 113; Tiffany 1928, p. 147, Pl. XIX, fig. 48. 
Dioecious, nannandrous, gynandrosporous; oogonia ovoid, patent or 
erect, below terminal setae or below androsporangial cells; outer oospore 
wall longitudinally ribbed, ribs serrate; androsporangia scattered, 
epigynous or hypogynous, 1—2; dwarf males on or near the oogonia, 
antheridia exterior, 1-3; vegetative cells 17-2222-33u; oogonia 
30-36 X 44-54; oospores 28-34 X42-52u; androsporangial cells 14-17 X 
14-18; dwarf male stipes 14-16 X 24—27y; antheridial cells 8-10 X 6—7u. 
United States: Iowa, Ohio, Illinois, Michigan, Alabama, 
Mississippi, Indiana; Canada, Europe. 
38a. Var. subsimplex (Wittrock) Hirn. 
(Pl. VI, fig. 49.) 
1900, p. 357, Pl. LIX and LX, fig. 374; B. pygmaea a. major Pringsh. 1858, 
p. 74; B. subsimplex Wittr. 1870, p. 142; 1874, p. 52; B. varians Wittr. var. alpina 
Wittr. and Lund. im Wittrock 1874, p. 53; B. dumosa Wood 1872, p. 202; B. reticulata 
Nordst. var. minor Lemmermann 1895, p. 25; Collins 1909, p. 273; Heering 1914, 
p. 239; Tiffany 1926, p. 110; 1928, p. 147, Pl. XIX, fig. 49. 
