Contents. 
v 
PAGE 
Berridge, Emily M. — The Structure of the Female Strobilus in Gnetum Gnemon. With 
four Figures in the Text ........... 987 
Gates, R. R. — Somatic Mitoses in Oenothera. With Plate LXXXVI .... 993 
Scott, D. H. — The Structure of Mesoxylon Lomaxii and M. poroxyloides. With Plates 
LXXXVII-XC 10 1 1 
de Fraine, E. — On the Structure and Affinities of Sutcliffia, in the Light of a newly 
discovered Specimen. With Plates XCI and XCII and nineteen Figures in the Text 1031 
Stephens, Edith L. — The Structure and Development of the Haustorium of Striga lutea. 
With Plate XCIII 1067 
Thompson, W. P. — The Anatomy and Relationships of the Gnetales. I. The Genus 
Ephedra. With Plates XCIV-XCVII and two Figures in the Text . . . 1077 
Ward, F. Kingdon. — Some Plant Formations from the Arid Regions of Western China . 1105 
Michell, Margaret Rutherford. — On the Comparative Anatomy of the Genera Ceraria 
and Portulacaria. With Plate XCVIII and four Figures in the Text . . . mi 
NOTES. 
Dommer, R. A. — A Bisexual ‘ Gymnospermous ’ Begonia. With one Figure in the Text . 1123 
Groom, Percy. — The Medullary Rays of Fagaceae 1124 
Stephens, Edith L. — Note on the Anatomy of Striga lutea, Lour 1125 
INDEX. 
A. ORIGINAL PAPERS AND NOTES. 
Bachmann, Freda M. — A New Type of Spermogonium and Fertilization in Collema. 
With Plate LXIX 747 
Bailey, Irving W. — The Evolutionary History of the Foliar Ray in the Wood of the 
Dicotyledons: and its Phylogenetic Significance. With Plates LXII and LXIII . 647 
Barrett, J. T. — Development and Sexuality of some Species of Olpidiopsis, (Cornu) Fischer. 
With Plates XXIII-XXVI 209 
Beer, Rudolf. — Studies in Spore Development. II. On the Structure and Division of the 
Nuclei in the Compositae. With Plates LXVI and LXVII 705 
Benson, Margaret. — Cordaites Felicis, sp. nov., a Cordaitean Leaf from the Lower Coal 
Measures of England. With Plate XXII and one Figure in the Text . . . 201 
Berridge, Emily M. — The Structure of the Female Strobilus in Gnetum Gnemon. With 
four Figures in the Text . 987 
see Thoday (Sykes), M. G. 
Betts, Annie S. — A Bee-hive Fungus, Pericystis alvei, Gen. et Sp. Nov. With Plates 
LXXV and LXXVI 795 
Blackman, V. H., and Welsford, E. J. — The Development of the Perithecium of 
Polystigma rubrum, DC. With Plates LXX and LXXI 761 
Bliss, Mary C. — -A Contribution to the Life-history of Viola. With Plates XVII-XIX . 155 
Bottomley, W. B. — The Root-nodules of Myrica Gale. With Plates XI and XII . . ill 
Bower, F. O. — Studies in the Phylogeny of the Filicales. II. Lophosoria, and its Relation 
to the Cyatheoideae and other Ferns. With Plates XXX-XXXVI . . .269 
Brenchley, Winifred E. — The Weeds of Arable Land in relation to the Soils on which 
they grow. II 95 
The Development of the Grain of Barley. With twenty-two 
Figures in the Text 903 
Browne, Isabel M. P. — Contributions to our Knowledge of the Anatomy of the Cone and 
Fertile Stem of Equisetum. With Plates LXIV and LXV and ten Figures in the Text 663 
Clark, J. J. — Abnormal Flowers of Amelanchier spicata. With twelve Figures in the Text 948 
Compton, R. H. — Note on a Case of Doubling of Embryo-sac, Pollen-tube, and Embryo . 243 
Dale, Elizabeth.— O n the Cause of ‘ Blindness’ in Potato Tubers 129 
