CONTENTS. 
No. LXXIII, January, 1905. 
PAGE 
Ward, H. M. — Recent Researches on the Parasitism of Fungi 1 
Eriksson, J. — On the Vegetative Life of some Uredineae ....... 55 
Maslen, A. J. — The Relation of Root to Stem in Calamites. With Plates I and II, and 
a Figure in the Text 61 
Czapek, F. — The Anti-ferment Reaction in Tropistic Movements of Plants .... 75 
Peirce, G. J. — The Dissemination and Germination of Arceuthobium occidentale, Engl. With 
Plates III and IV 99 
Sargant, Miss E., and Robertson, Miss A. — The Anatomy of the Scutellum in Zea Ma'ls. 
With Plate V . . 115 
Salmon, E. S. — Further Cultural Experiments with ‘Biologic Forms’ of the Erysiphaceae . 125 
Vines, S. H. — The Proteases of Plants. II 149 
NOTES. 
Fritsch, F. E. — Algological Notes. No. 6 : The Plankton of some English Rivers . . 163 
Parkin, J. — On a brilliant Pigment appearing after Injury in Species of Jacobinia (N. O. 
Acanthaceae). (Abstract.) ... . 167 
Scott, D. H. — On the Structure and Affinities of Fossil Plants from the Palaeozoic Rocks. — 
V. On a new Type of Sphenophyllaceous Cone (Sphenophyllum fertile) from the Lower 
Coal-measures. (Abstract.) 168 
No. LXXIV, April, 1905. 
Vines, S. H. — The Proteases of Plants. III. . . 1 7 1 
Allen, C. E. — Nuclear Division in the Pollen Mother-cells of Lilium canadense. With 
Plates VI-IX 189 
Gwynne-Vaughan, D. T. — On the Anatomy of Archangiopteris Henryi and other Marat- 
tiaceae. With Plate X ...... ..... 259 
Berridge, Miss E. M. — On two New Specimens of Spencerites insignis. With Plates XI 
and XII, and three Figures in the Text 273 
Blackman, F. F. — Optima and Limiting Factors. With two Diagrams in the Text . . 281 
Leake, H. M. — The Localization of the Indigo-producing Substance in Indigo-yielding Plants. 
With Plate XIII 297 
Newcombe, F. C. — Geotropic Response at Various Angles of Inclination . . . .311 
NOTES. 
Massee, G. — On the Presence of Binudeate Cells in the Ascomycetes. With a Figure in 
the Text 325 
Arber, E. A. N. — On some Species of Lagenostoma : a Type of Pteridospermous Seed from 
the Coal-measures. (Abstract.) . , .326 
