134 A REVIEW OF THE BRITISH CHARACEJE. 



but half the joints corticate. This is a very distinct plant, and 

 ought perhaps to be regarded as a species. Fig. 8a. (Part of 

 specimen in Herb. Kew, and branchlet of upper whorl.) 



A very variable species, the larger form approaching G. hispida, 

 but in the smaller and ordinary forms easily distinguishable from it 

 by the more slender stem and few, obtuse, appressed spine-cells. 

 The variation is well summarized in Braun's ! Conspectus ■ : 

 " Variat subinermis et siibhispida, macroteles et brachyteles, longibrac- 

 teata et brevibracteata, elowjata et condensata, macrophylla et bra- 

 chyphylla, aut strict a" u aut converyens, aut direnjens, imo refracta, 

 valde incntstata, rarius munda, plerumque plurocarpa, rarissime 

 melanocarpa 1 ' ; and a very careful and complete analysis of the 

 forms is given by Braun in ■ Characeen Afrikas.' The name of 

 C. vulgaris has recently been superseded in England, as elsewhere, 

 by C.fcetida, Braun, but we have returned to the original name, 

 although it is open to the same objection as most of the Linnean 

 names, that it included more than the species as we now have it ; 

 but the alternative name of C. ftetida, A. Br., has less claims to 

 acceptance, as it has held at least three distinct values in the hands 

 of its author. C. vulgaris has a world-wide distribution, being 



occurring 



. It is our commonest species, but does not appear to be 

 so abundant in Ireland. 



Stagnant and slowly running water. May and June. Corn- 

 wall, W. (and var. d) ; Wigbt (and var. b) ; Hants, S. (and var. b) 

 Sussex, W. (and var. b) ; Sussex, E. (and var. c) ; Kent, E. and W. 

 Surrey; Essex, S. and N. ; Middlesex (and var. b); Oxon 

 Suffolk, W.; Norfolk, E. (var. c) ; Cambridge (and var. c) 

 Bedford; Northampton; Warwick (and var. e) ; Anglesea (var. b.) 

 Leicester; Nottingham; Derby; Cheshire; Lancashire, S. 

 York, S.E. (var. c) ; York, N.E., S.W., and M.W. ; Durham 

 Northumberland; Westmoreland; Roxburgh; Edinburgh; Fife 

 Forfar; Kerry, N. ; Cork, N. (and var. b) ; Dublin (and var. b) 

 Westmeath. V ; V 



Var. crassicmdis.— Coventry Park, Warwick, 1856. T. Kirk, in 

 the British Museum and Kew Herbaria, &c. 



[C. contra na, Braun, which closely resembles C. vulgaris, but 

 differs in having the primary cortical cells more prominent than 

 the secondary, its strict habit, and smaller size ; and C. papillosa, 

 Kutz. (C. intermedia, A. Br.), which bears somewhat the same 

 relation to C. hispida, should be looked for.] 



§ 3. Haplostich*:. — Stem with 1 ram 



—Stem with 1 row of cortical cells to each brancMet. 



ix. C. canescens, Lois. Notice (1810), p. 139; Reich, i" 

 Mussler's Handb., ed. hi., p. 1669. 



0. crinita, Wallr. Ann. Bot. (1815), p. 190, t. 3; Bruz. Obs. 

 Char pp. 10 and 19; Gant. Oesterr. Char., p. 14, f. 8; Bab. 

 ^• N 'H., 1850, p. 88; Wallm. Act. Stockh., 1854, p. 319 ; K**- 

 lab . Phyc, vn., t. 69, f. 1; Braun, Consn. Char. Europ., P- 5 '> 

 i\. Dan. (1867), t. 2747; Braun, R. & S., Exs. 6, 65-68, 80; 

 Nordst. & Wahlst., Exs. 23-29. 



