JO 



The Irish Naturalist, 



125. Dublin, 



Ci aspcra, var. caplllata, Braun. 



- Royal Canal, Blanch ardstown, 1889. 

 Scully. 



130. Galway, B. , 



R, W. 



var. curta, Braun. 

 L. Derg, 1881. B. King. 



135. Galway, W., 

 136 Mayo, W., 



144. Tyrone, 



145. Armagh, 

 148 Antrim, 



138. Sligo, 



139. Leitrim, 



148. Antrim, 



149. Londonderrj% 



var. lacustrlSf H. and J. G. 



- Roundstone. Hb., J. Woods. 

 ■ L,. Cullin. A. G. More. 



- Arboe, 1891, S.A. Brenan. 



- L. Neagh, Lurgan, 1890. R. LI. Praeger. 

 • Iv. Neagh, Crumlin, 1894. S. A. Stewart. 



var. sublnermlSy Kuetz. 



- Lough Gill R., 1884. R. M. Barrington, 



- GlenadeL, 1884. R. M, Barrington, 



- Rathlin I. D. Moore. 

 R. Bann, 1894. R, LI. Praeger, 



C. aspera is a common species in Ireland, occurring in the lakes and 

 canals as well as in the peat-pits and pools, and is more generally distri- 

 buted than in England. It occurs throughout Europe and in North 

 Africa and North America. The plant we have referred to the var. 

 (iirta has short incurved branchlets and many short spine-cells, but is 

 not so extreme as some of the continental plants, which have the 

 branchlets only from 2-3 mm. long. In L- Owel, Westmeath, we col- 

 lected a plant with very long internodes and comparatively very short 

 incurved branchlets, which resembled the Swiss plant much magnified. 

 The var. capillaia from Co. Dublin is not so extreme as the Holyhead 

 plant. Man)' of the Irish specimens approach this variety. 



[C. strigosa, Braun. In the Journal of Botany, May, 1887, we suggested 

 the possibility of a specimen collected by Mr. R. M. Barrington in Lough 

 Ree belonging to this species, but being sterile we were unable to deter- 

 mine it. Since then we have not had any further light thrown on the 

 subject, and having in view the curious forms of C. aspera which we have 

 collected in the Westmeath lakes, we think the plant is possibly only a 

 state of that species. It would, however, be very desirable for L. Ree to 

 be searched in order to settle the question.] 



116. Cork, N., 

 124. Kildare, - 

 121. Queen's Co., 

 123. Wicklow, 



130. Galway, E., 

 133. Westmeath, 

 135. Galway, W., 

 137. Mayo, E., 

 145. Armagh, 



C. polyacantha, Braun. 



Shanagarry Bog. I. Carroll. 



I Canal, near Monasterevan, 1893. R. LI. Praeger, 



Near Newcastle, 1892. R. M. Barrington and 



H. and J. G. 

 Headford, 1832. Hb. Shuttleworth. 

 Scraw Bog, near L. Owel, 1892. H. C. Levinge. 

 Moycullen, 1892. H. and J. G. 

 Foxford. A. G. More. 

 Loughgall L., 1892. R. LI. Praeger. 



This species was figured by Plukenet in 1691 from a specimen collected 

 by Sherard in " Turf Bogs in Ireland." It usually occurs in peat-pits and 

 ditches. In Britain it is generally much incrusted, but we have had 



