50 BRITISH CHAROPHYTA. 



The foot-stalk of the antheridium is occasionally elongated, 

 whence Kiitzing's name of C. pedunculata. In a specimen 

 collected by G. R. B.-W., at Garboldisham, Suffolk, the foot- 

 stalks of some of the oogonia have grown out considerably, being 

 in some instances 2-3 times the length of the oogonia. 



Very reluctantly we have replaced the well-known name of 

 C. polyacantha by that of 0. aculeolata, as the former cannot 

 under the " Rules " be retained, three earher names having been 

 published. Braun referred C. aculeolata Kiitz. to C. intermedia 

 (C. papillosa Kiitz.), and this determination has been followed 

 by Sydow and Migula. The plant from Tennstadt in Thuringia, 

 however, on which Kiitzing's species was founded, which was 

 issued in Reichenbach's Exsiccata (No. 426), and which is well 

 figured in Kiitzing's excellent plate in ' Tab. Phyc' belongs, we 

 consider, to the present species, but is a weak sterile form. The 

 second name in priority, C. pedunculata, Braun was in no doubt 

 in referring here, while the third, C. spondylophylla, was merely a 

 name substituted by its author for that of C. pedunculata, when 

 he found that the stalked antheridium was not the normal state. 



C. aculeolata is characteristically a plant of peaty places, and, 

 as might be expected, is much more prevalent in Ireland than in 

 Great Britain. It was first iomxd by Sherard in Ireland, and 

 was described and figured by Plukenet in 1692, from his speci- 

 mens. Braun says of it (' Consp. Charac. Europ.' p. 6) : " amat 

 loca salsa." 



Most of the British locahties are inland. 



[C. strigosa Braun, a rather small neat plant with 

 sub-triplostichous cortex, long slender persistent spine- 

 cells, some solitary, some clustered, and rather smaller 

 fruits than those of C. aculeolata, is recorded from Sweden, 

 Southern Germany, Switzerland, and Austria. (Braun, 

 Eabenh. & Stiz., Exsicc, Nos. 42 and 43. Migula, 

 'Die Characeen,' p. 468, ff. 105-7.)] 



Subsection 3. Triplostichse. Rows of cortical-cells 

 of the stem treble the number of the branchlets, two 

 rows of secondary cells being produced to each primary 

 row. 



A. Dioecise. 



