( 9 ) - 
above. In the lower part of the stem the verticils are 3—4 cm. 
distant, the leaves about 3 cm. long, equaling the length of the 
internode. The lower leaves are sterile and divided above the 
middle into 3 or 4 segments, which are again divided (usually) 
into 2 or 3 very short mucronate terminals. The leaves of the 
upper verticils are shorter but still diffusely spreading and not 
condensed into a congested mass ; they are 2-, rarely 3-divided ; 
the first node bears 3-5 divisions and is at times fertile, the sec¬ 
ond 2 or 3, and the third, when present 2 (rarely 3 terminals). 
The stem is 400 in diameter, the verticil consists of 7 or 8 
leaves ; the first segment of the leaf is 286 in diameter, the sec¬ 
ond 200, the third 143 and the terminal 143. The terminal is 
frequently 3-celled, the division being 'ifi near the upper extrem¬ 
ity ; it does not taper markedly to the mucro. The mucro is 
about 25-35 i J1 diameter to 70-80 long, not very evanescent. 
The antheridia are about 225 in diameter. The oogonia are iso¬ 
lated usually, but often aggregated at both nodes, more often on 
the second node. The oospores are 275 long by 240 broad, 
with five or six ridges ; the membrane is marked by long and 
short granules irregularly arranged. 
This species seems to belong in a group with Nitella rigida and 
N. Tanakiana, and to be slightly related to N. gracilis; from the 
former species it is distinguished by its more diffuse habit, the 
fertile verticils not on spike-like shoots, from N. gracilis by numer¬ 
ous characters, though the tendency to the three-celled terminal is 
seen in all these species. 
Collected in Sweibachi-ike pond, province Kyoto, Japan. 
Named for a faithful and industrious collector, Kenzo Saito. 
B.-NOTE CONCERNING NITELLA ORIENTALS ALLEN, WITH DESCRIPTION OF A NEW 
ALLIED SPECIES. 
Nitella orientalis Allen, Bull. Torr. Bot. Club, 1 : 524. 1893. 
This plant varies greatly from different localities, not only in 
size, but in the divisions of the leaves. The leaves are often only 
3 times divided, often 5 times ; the terminals, often very short 
(brachydactylae) are again quite long (macrodactylae), so that I 
have been in doubt about referring the species to the “ polyglochin" 
series. The antheridia vary from 75—300 in diameter. The oogonia 
are usually clustered, but sometimes isolated never on the first node; 
the oospores vary from 340—375 long and 285-320 broad, always 
