THE OTHER BRITISH FERNS— POLTSTICHUM, ATHTRIUM, CETERACH 



List of chromosome numbers recorded in this chapter 



Wales 



Ceterach: 



C. officinarum Lam. & DC. Devon 



Southern France 

 C. aureum (Cav.) v. Buch Teneriffe 



72 

 72 

 72 



Tetraploid species 



109 



