﻿Allen: Contributions to Japanese Characeae 77 



internode (aspect of N. transilis Allen) ; leaf usually thrice di- 



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segment, shorter, 40 to 48 in diam. ; the second node bears four di- 

 visions, fertile; the third segment, 30 to 35 in diam.; the third 

 node, fertile, bears 4 or even 5 terminals; the terminals slender, 

 longer than the preceding segment and nearly as long as the 

 first, 34 in diameter, one-celled, except the mucro, which is about 

 15 in diameter by 55 to 68 long (large for the size of the plant). 



The obgonia are isolated at the second and third nodes of the 

 leaf; the oospore is 190 to 197 long by 150 to 156 broad, with six 

 or seven sharp wavy ridges. Antheridium 125 to 135 in diam. 

 The spore membrane is remarkable in being covered with coarse ele- 

 vated elongated granules. The ridges are acute at their tops, but 

 spread at their bases, where they join the surface of the shell ; these 

 bases are wavy-toothed. The granules are often very short, al- 

 most oval, often elongated even to a length of five mikrons. 



This species approaches N. transilis Allen, differing in its 

 greater tenuity, much smaller oospore, with a different spore- mem- 



brane. 



Collected in " Shi 

 mature in December. 



Mikawa, Tap 



D.— DESCRIPTION OF NEW VARIETIES AND FORMS OF NITELLA PSEUDOFLABELLATA A. 



BR. FROM JAPANESE WATERS. 



The name was given by A. Braun to the species collected by 

 the Prussian expedition to eastern Asia, 1866. This was 

 formerly confused with A r . flagelliformis {N. dispersa A. Br.) 

 from Java, in Lake Telaga Padenga (in Herb Van den Bosch) very 

 elongated, one to two feet, relatively slender, verticils remote with 

 condensed and tangled leaf-tips, so differing from N. gracilis, also 

 blackish-green, flexible. * * * Fertile leaves three- or even 

 four times divided. The first segment of the leaf distinguished by 

 its length, as long as, or longer than all the divided part of the leaf. 

 First division into five or six rays, of which one or two may be 

 simnl* *K* r* m *;«rW further divided; the succeeding segments 



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becoming shorter, but the last again longer. 

 China : Bengal: Borneo, var. mutila A. Br. 



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* * 



J 



In his Characeae Nov. Zeland. in Act. Univ. Lund, 1880, 



it a possible new species. 



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