stem) of 6—8 leaves which spread from stem. Leaves about 2 
cm. long. First segment almost, but not quite, half the com¬ 
bined length of all the divisions of the leaf; divided four or even 
six times ; first node, bears 6 to 7 segments, sterile ; second node, 
fertile, bears 4 or 5 segments; third node, sterile or fertile, bears 
4 segments ; fourth node, bears 4 segments; fifth node, bears 3 
segments; sixth node, bears 2 or 3 terminals. The mucro is 
.30 [J. in diameter, by 54 long. The first node is always sterile. 
The oogonia are isolated at the second node, rarely also on the 
third node. The oospores are 275 to 300 ;x long, and 240 to 290 
broad, with 7 or 8 rounded ridges ; the membrane is evenly gran¬ 
ular with about three granules in 5 mikrons. 
Collected in “ Obitorinoike water,” Kyoto, Japan. Mature 
in July. 
The following forms coincide with the type in having leaves 
with 4 to 6 nodes; the first node always sterile ; the oogonia iso¬ 
lated at the second and third nodes and the spore-membrane 
granular. 
As regards division of the leaf, the type has six nodes: f 
suberecta and fi intermedia have each five and f transiliforma 
four. I11 respect to size the type is more spreading and longer, 
f intermedia is coarser and fi transiliforma the most delicate ; as 
to oospores fi intermedia reaches 306/* long by 218 broad, while 
the others vary within the limits of 240 to 300 long by 224 to 290 
broad; the granulation of the spore-membrane is tolerably uni¬ 
form in all, but faintest in fi suberecta. 
The mucrones vary from 48 by 15 in intermedia ; 61 by 27 in 
suberecta, 54 by 30 in the type and f. transiliforma. 
Nitella multipartita Allen, forma suberecta. 
Plants 15—20 cm. long, rather erect, sparingly branched; 
stem about 400—500 in diam. Verticils spreading, color dull 
yellowish green, more of the aspect of the forms of N. pseudofila- 
bellata than of the bright, clear green of the succeeding form. 
Leaves bear 4 or 5 nodes ; first, with 6 or 7 divisions, sterile ; 
second, 4 or 5 divisions, fertile; third, 4 or 5 divisions, fertile ; 
fourth, 3 or 4 divisions, sterile; fifth node with 2 or 3 divisions. 
The segments of the leaves vary, the first, 2800-3300 long, 122 
in diam., the second, 1600-2600 long, 48-80 in diam.; the third, 
1400-2700 long, 54 in diam.; the fourth 500-2000 long, 40 in 
diam.; the terminals 170-240 long, 34 in diam.; the mucro 20- 
