CONTENTS 



Part 4. 



Variation in Arum maculatum. By C. T. Prime 



Notes on the Identification of some British Species of Gallitriche. By Herbert Jones 



Cytogenetic Studies in the Dryopteris spinulosa Complex — I. By S/ Walker 



Tragopogon pratensis in the Central Cotswolds. By D. M. Barling . . . 



Taxonomic Studies in the Genus Cerastium : 1. C. atrovirens, C. pumilum, C. semi 

 decandrum. By F. H. Whitehead 



A New British Species of Senecio. By Effie M. Rosser 



Notes on British Hieracia — I. By P. D. Sell and C. West 



Part 5. 



RuBus ARCTicus L. IN BRITAIN. By R. M. Harley 



A New Subspecies of Pedicularis sylvatica L. By D. A. Webb 



Some New Chromosome Numbers in the Cyperaceae. By Elizabeth W. Davies . . 



The Chromosome Numbers of the British Menthae. By J. K. Morton . . 



Hybridisation between Diploid and Tetraploid Species of Euphrasia. By P. F. Yeo 



Geranium purpureum Vill. and G. robertianum L. in the British Flora — II. Geranium 

 ROBERTiANLTM. By H. G. Baker 



The Genus Symphytum in Britain. By T. G. Tutin . . . . 



Review . . . . . . 



Part 6. 



New Species and Combinations in the Genus Rubus L. By W. C. R. Watson 



A Biosystematic Study of some Glyceria Species in Britain. I — Taxonomy. By Martin 

 Borrill . . 



A Biosystematic Study of some Glyceria Species in Britain. II — Cytology. By Martin 

 Borrill . . 



Studies on Ononis in Britain. I — Hybridity in the Durham Coast Colonies of Ononis. 

 By J. K. Morton 



Generic Criteria in Flowering Plants. By T. G. Tutin 



Taxonomic Studies in the Genus Cerastium. II — Cerastium subtetrandrum (Lange) Murb. 

 By F. H. Whitehead 



Reviews . . 



Index 



4 



