﻿80 Allen : Contributions to Japanese Characeae 



and furnish places for many new ones ; but a few new forms have 

 come to hand with leaves many times divided, with more than four 

 or even six nodes, and it would be convenient to enlarge 

 the bounds to admit them. They cannot be referred to the 

 brachy dactylae group for they belong to the macrodactylae. 

 They do not consort with the forms of N.pseudoflabellata A.Br., for 

 the leaves differ in appearance, especially because the first seg- 

 ment of the leaf is not longer than half of the whole divided leaf; 

 so I propose a new subdivision, Perflabellatae , with leaves 4 or more 

 times divided. The new arrangement is as follows : 



1 . Segments of the second division of the leaf commonly 2 or 3 ; 

 primary segments not longer than half the divided leaf (N. mucro- 

 nata A. Br., N. expansa Allen, etc.). § 1. Flabellatae. 



2. Secondary segments commonly 4-6 ; primary segments longer 

 than half the divided leaf {N. pseudoflabellata A. Br. and va- 



rieties). § 2. Pseudoflabellatae. 



3. Secondary segments commonly 4.-5; primary segments not 

 longer than half the leaf Leaf many times divided with 4-6 or 



more nodes. § 3. Perflabellatae. 



Since the forms of the last section are somewhat similar in 

 habit, have a similar oospore-membrane, and the first node is usually 

 sterile and the oogonia isolated, I have placed them under one 

 species, with three varieties as follows : 



NlTELLA MULTIPARTITA Sp. nOV. 



Plants elongated, 40 cm. or more, flexible, branching from 

 nearly every verticil. Verticils somewhat remote (at centre 

 of stem) of 6-8 leaves which spread from stem. Leaves 

 about 2 cm long. First segment almost, but not quite, half 

 the combined length of all the divisions of the leaf; divided 



, bears 6 to 7 segments, sterile ; 



segments ; third node, sterile or 



ft 



first 



fourth node, bears 4 segments ; fifth 



bears 3 segments ; sixth node, bears 2 or 3 terminals. The mucro 

 is30/Mndiameter,by54long. The first node is always sterile. The 

 oogonia are isolated at the second node, rarely also on the third 



S^% Jfr£3KE 27 i ?J»t** and ¥ oto abroad, 



about three granules in 5 mikrons. 



Japan. Mature in 



