46 BRITISH CHAROPHYTA. 



First record (var. affinis): Babington, 'Manual,' 1881, 



Outside the British Isles C. baltica occurs in Sweden, 

 Finland, Denmark, France and Northern Germany, 

 also in North America (Greenland) and South America 

 (Bolivia). 



A medium-sized to rather large plant, usually of a clear dark 

 green, owing to the absence of incrustation, fruiting rather 

 sparsely. It occurs usually in more or less brackish water, but 

 grows actually in sea water in the Baltic. The Orkney plant, 

 which is variable in form, attains a height of about 1 metre. It 

 closely resembles the Scandinavian plant. That from Little 

 Sea is less typical, having a number of geminate spine-cells. 

 We have not seen sufficient material from this locaUty to feel 

 quite satisfied as to its identity, but do not think it can belong 

 to any other species. A remarkably attenuated form (var. 

 Liljebladii Wahlst.) with much elongated branchlets, spine-cells 

 and bract-cells has been found in S. Norway. The large com- 

 posite bulbils of C. baliica are distinctive in character, see Vol. I, 

 iig. 13, p. 39. Fries is often quoted as the authority for the specific 

 name, but his publication of it in 1823 was not a vahd one. 



Var. b. affiuis. 



H. & J. Gbovbs in Joiii-n. Bot. XIX, p. 353, t. 244 (1881) ; Bxsicc. 

 No. 86. 



(Plate XXXVII, figs. 1—5.) 



Cortex with the primary and secondary cortical-cells 

 of nearly equal diameter. Spine-cells often 2 or 3 

 together, slender, in length exceeding the diameter of the 

 stem, less spreading than in the type. 



Cornwall, W., small pools and stream close to Kynance 

 Cove (/. Cunnack, 1876). 



Guernsey, Grande Mare {E. D. Marquand, 1889). 



A weaker more flexuous plant than the type. In the 

 Cornish specimens the spine-cells are frequently clus- 

 tered, in those from Guernsey they are almost always 

 solitary. 



