WATSONIA 



JOURNAL OF THE 

 BOTANICAL SOCIETY OF THE BRITISH^ ISLES 



Editor : E. F. WARBURG, M.A., Ph.D. 

 Vol. 3 FEBRUARY 1955 Pt. 3 



CONTENTS PAGE 



The Cytogenetics of Carex flava and its Allies. By Elizabeth W. 



Davies 129-137 



Studies on Ulmus : I. The Range of Variation of East Anglian 



Elms. By R. H. Richens 138-153 



Some Chromosome Counts in the European Cistaceae. By M. C. F. 



Proctor , 154-159 



Geranium purpureum Vill. and G. robertianum L. in the British 



Flora : 1. Geranium purpureum. By H. G. Baker . . . . 160-167 



Comparative Study of Diploid and Tetraploid Spores of Dryopteris 



DiLATATA FROM Britain AND EuROPE. By Fern Ward Crane . . 168-169 



Chromosome Races in Cardamine pratensis in the British Isles. By 



F. Hussein 170-174 



Vegetative Reproduction in Arum maculutum. By C. T. Prime . . 175-178 

 Book Reviews 179-180 



PUBLISHED AND SOLD BY THE 

 BOTANICAL SOCIETY OF THE BRITISH ISLES 

 c/o Department of Botany, British Museum (Natural History), London 

 Price Fifteen Shillings 



