﻿Allen: Contributions to Japanese Characeae 79 



the first node sterile, bears 6-7 rays ; the second, fertile, bears 5 rays ; 

 the third node, sterile, bears 2-4 simple, two- celled, terminal rays. 

 Infertile leaves these terminals are again divided, kit rarely. The 

 second segment is shorter than the first, 75-80 in diam. ; the third 

 is about the length of the second, 48 in diam. Occasionally a 

 ray of the second, fertile, node is undivided and elongated to 

 equal the length of the terminal rays. The mucro is 20 in diam. 

 at base and 70-80 long. The antheridium is about 125 in diam. 

 The dbgonia are isolated at the second node, only ; the oospore 292 

 long by 272 broad ; with 7-8 faint ridges. The surface of the colored 

 membrane is marked by faint granules, in very low relief, the tops 

 of the ridges are dotted with more prominent granules irregularly 

 disposed, almost as if toothed. From the type this variety differs 



1 



>/< 



of the oospore 



Kyoto, J 



Nitella pseudoflabellata ramuscula Allen forma testa-glabra. 



Plants about 30 cm. long, slender, lower verticils remote 

 upper becoming crowded, sparingly branched, stem about 500 p 

 in diameter. The verticils consist of 8 leaves. The leaves are 

 thrice divided (very rarely four times divided). The first seg- 



r .■> , v J _•*.- i ~U n «.+ -f^tv.-G-fth* nf the fvttVP. 



leaf 150 in diam. The fi 



four-fifths of 



divisions ; the second node, fertile, has four (usually, rarely o) 

 divisions, with an occasional undivided terminal ray; the third 

 node, sterile, bears three to four terminals. The second segment 

 of the leaf is usually short, 80 in diameter, the third segment is 

 longer than the second about 54 in diameter ; the fourth (and fifth, 

 when present) are terminal, 50 in diameter, tapering to the end; 

 the mucro 20 fi in diameter and 60 long. The antheridia are about 

 1 36 in diameter ; the dbgonia isolated on the second node only. 1 he 

 oospores are 285 long by 272 broad with six faint ridges; the 

 colored membrane of the oospore is perfectly smooth No indica- 

 tions of mucus have been found on either of the forms in this 



variety. 



Gathered in Mizoro pond, Kyoto, Japan. 



E.-A NEW DIVISION OF THE FLABELLATAE-MACRODACTYLAE SPECIES OF THE 



DIARTHRODACTYLAE SECTION OF NITELLA. 



Subflabel- 



nit apctics uuvv n.iiun"i "»' v — * ' 



latac, leaves once or twice divided, and (2) Flabellatae, twice, thrice 



.. _« 1 • • ' — A i. U. t* 



or even four times divided. While 



sharply defined, they have served to embrace our known species 



