CONTENTS 



Part 1. 



MoNTiA FONTANA L. By S. M. Walters 



NUPHAR INTERMEDIA LeDEB., A PRESUMED RELICT HYBRID, IN BRITAIN. By Yoknde Heslop 



Harrison 



Regional Variation of Alnus glutinosa (L.) Gaertn. in Britain. By D. N. McVean 



Epipogium aphyllum Sw. in Buckinghamshire. By R. A. Graham 



Arctic Plants not yet found in Britain. By Nicholas Polunin 



A 17th Century Contribution to the Scottish Flora. By F. H. Perring 



Proliferation of Spikelets in British Grasses. By P. R. Wycherley. . 



The Distribution of Dryopteris borreri Newm. in the British Isles. By P. J. Pugh . 



Notes on Carex flava and its Allies : 1 — A Sedge New to the British Isles. By Elizabeth 

 W. Davies 



Notes on Carex flava and its Allies : II — Carex lepidocarpa in the British Isles. By 

 Elizabeth W. Davies 



Notes on Carex flava and its Allies : III — The Taxonomy and Morphology of the 

 British Representatives. By Elizabeth W . Davies 



Notes on Carex flava and its Allies : IV — Geographic Distribution. By Elizabeth 

 W. Davies . . . . . . . . . . . . 



Part 2. 



Variation in Peplis portula L. By D. E. Allen . . . . 85-91 



Vascular Plants common to the Arctic and the British Isles : Enumeration of Species. 



By Nicholas Polunin . . . . . . . . 92-100 



The Cytology of British Species of Euphrasia. By P. F. Yeo . . . . . . 101-108 



Mint Notes. By R. A. Graham . . . . . . . . . . 109-121 



Stellaria nemorum L. subspecies glochidisperma Murbeck in Britain. By P. S. Green 122-126 



Book Reviews . . . . . . . . . . . . . . . . . . 127-128 



Part 3. 



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 : I. Geranium 



PURPUREUM. By H. G. Baker . . . . 160-167 



Comparative Study of Diploid and Tetraploid Spores of Dryopteris dilatata from Britain 



and Europe. By Fern Vy/ard 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 



iii 



