CONTENTS. XIX 



Physiology. 



Nutrition and Growth. pagr 



Koressi, F. — Nitrogen-assimilation by Plant-hairs 361 



Boudois, G.— Influence of Water on Roots of Trees 558 



General . 



Schcbteb, I. V., & V. Ulehla — Organisms in Nectaries 55 



CRYPTOGAMS. 



Pteridophyta. 



Bower, F. O. — Phylogenetic Studies of Ferns 55 



Schoute, J.O. — Dichotomy and Lateral Branching in Pteropsidx 181 



Wilson, W. J. — Lepidostrobus mintoensis 181 



Beer. R. — Spore-development in Equisetum 1S2 



Bosch, R. B. Van den — Synopsis Hemenophyllacearum 182 



Frye, T. C..& others — North American Ferns 182 



Lang, W. H. — Embryo of Helminthostach'ys 273 



Wand, A. — Apical Growth and Branching in Selaginella 273 



Kashyap, S. R. — Prothallus of Equisetum debile .. 274 



Gwynne-Vaughan, D. T. — Mixed Pith in Osmunda regalis 274 



Tidestrom, I. — Botrychium 274 



Bertkand, P. — Corynepteris and Zygopteris 274 



Maxon, W. R. — Tree-ferns of North America 275 



Maxon, W. R. & Slosson, M. — Tropical American Ferns 275 



Johnson, T. — Bothrodendron kiltorhense 362 



Morton, F.—Phyllitis 362 



Marsh. A. S. — Azolla in British Isles 363 



Copeland, E. B. — New Papuan Ferns .. 363 



Bower, F. O. — Phytogeny of the Filicales 463 



Sinnott, E. W. — Jurassic Osmundacese from New Zealand 463 



Watson, D. M. S.—Ulode?idroid Scar 464 



Hill, J. Ben — Anatomy of Epiphytic Lycopodiums 465 



Lignier, 0. — Stigmaria 465 



Zeiller, R. — Lepidostrobus 466 



„ „ Weald.ian Plants from Peru 466 



Campbell, D. H. — Macraglossum 559 



Benedict, R. C. — Vittaria 559 



Copeland, E. B. — Sumatra Ferns 560 



Bryophyta. 



Black, C. A. — Riccia Frostii 56 



Dixon, H. N. — Tetraphidopsis 56 



„ Ditrichum and Thuidium 56 



„ Dicranoloma 56 



Andrews, A. Le R. — North American Sphagnum 67 



Boresch, K. — Filamentous Formations in Moss-cells 1S2 



Ubisch, G. v. — Sterile Moss-cultures 183 



Warnstokf, C.,& others — Fresh-water Mosses 183 



Graham, M. — Nuclear Division in Preissia 183 



Zodda, G. — New Hyophila from Tripoli 183 



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