INDEX 
A. ORIGINAL PAPERS AND NOTES. 
PAGE 
Arber, Agnes. — T he Leaf Structure of the Iridaceae, considered in Relation to the Phyllode 
Theory. With sixty-six Figures in the Text 301 
Bews, J. W. — Some General Principles of Plant Distribution as illustrated by the South 
African Flora 1 
Blackburn, Kathleen B., and Harrison, J. W. Heslop.— T he Status of the British 
Rose Forms as determined by their Cytological Behaviour. With Plates IX and X 
and five Figures in the Text 159 
Boyle, C. — Studies in the Physiology of Parasitism. VI. Infection by Sclerotinia Libertiana. 
With Plate XIV . 337 
Brenchley, Winifred E., and Jackson, Violet G. — Root Development in Barley and 
Wheat under Different Conditions of Growth. With four Figures in the Text . . *533 
Browne, Isabel M. P. — A Fourth Contribution to our Knowledge of the Anatomy of the 
Cone and Fertile Stem of Equisetum. With Plate XXI and twelve Figures in the 
Text 427 
Butler, O.— See Smith, T. O. 
Campbell, Douglas Houghton. — T he Gametophyte and Embryo of Botrychium obliquum, 
Miihl. With Plate VIII and eleven Figures in the Text .141 
Cayley, Dorothy M. — Some Observations on the Life-history of Nectria galligena, Bres. 
With Plates IV and V 79 
Chandler, M. E. J. — Note on the Occurrence of Sequoia in the Headon Beds of Hordwell, 
Hants ............... 457 
Cutting, E. M. — On the Pollination Mechanism of Incarvillea Delavayi, Franch. With 
three Figures in the Text ........... 63 
Observations on Variations in the Flowers of Stachys sylvatica, Linn. With 
five Figures in the Text 409 
Daniels, Margaret E. — See Holden, H. S. 
Dastur, Jehangir Fardunji. — C ytology of Tilletia Tritici, (Bjerk.) Wint. With Plate XX 
and nine Figures in the Text ....... ... . 399 
Edwards, W. N. — Fossil Coniferous Wood from Kerguelen Island. With Plate XXIII and 
four Figures in the Text 609 
Gates, R. Ruggles, and Rees, E. M. — A Cytological Study of Pollen Development in 
Lactuca. With Plates XVI-XIX 365 
Gregory, F. G. — Studies in the Energy Relations of Plants. I. The Increase in Area of 
Leaves and Leaf Surface of Cucumis sativus. With fifteen Figures in the Text 93 
Guppy, H. B. — The Testimony of the Endemic Species of the Canary Islands in Favour of the 
Age and Area Theory of Dr. Willis . 513 
Harrison, J. W. Heslop. — S ee Blackburn, Kathleen B. 
Hatfield, E. J. — Anatomy of the Seedling and Young Plant of Macrozamia Fraseri. With 
Plate XXII and eight Figures in the Text . 565 
Holden, H. S., and Daniels, Margaret E. — Observations on the Anatomy of Terato- 
logical Seedlings. IV. Further Studies on the Anatomy of Atypical Seedlings of 
Impatiens Roylei, Walp. With ninety-seven Figures in the Text . . . .461 
Holmes, M. G. — A Contribution to the Study of Water-conductivity in Sycamore Wood. 
With thirteen Figures in the Text . . . . . . . . . .251 
Horne, Arthur S. — Phloem Necrosis (Brown Bast Disease) in Hevea brasiliensis . . 457 
