CONTENTS. 
PAGE 
Harper, R. A. — Cell-Division in Sporangia and Asci. (With Plates 
XXIV-XXVI.) ........ 467 
Worsdell, W. Observations on the Vascular System of the 
Female ‘ Flowers ’ of Coniferae. (With Plate XXVII.) 527 
Ward, H. Marshall. — Symbiosis ....... 549 
Some Methods for use in the Culture of 
Algae. (With Plate XXVIII.) . . 563 
Darwin, F.— On Geotropism and the Localization of the Sensitive 
Region. (With Plate XXIX.) . . . .567 
Wager, H. — The Sexuality of the Fungi ...... 575 
NOTES. 
Thiselton-Dyer, Sir W. T. — On the Influence of the Temperature 
of Liquid Hydrogen on the Germinative Power of Seeds 599 
Bertrand, C. E. — On the Structure of the Stem of a Ribbed Sigillaria 607 
Seward, A. C. — The Jurassic Flora of Britain ..... 610 
A New Genus of Palaeozoic Plants .... 612 
Scott, D. H.— On the Primary Wood of certain Araucarioxylons . 615 
Pertz, Miss D. F. M. — On the Gravitation Stimulus in Relation to 
Position 620 
Parkin, J. — Some Observations bearing on the Function of Latex . 620 
Dale, Miss E. — Intumescences of Hibiscus vitifolius . . . 622 
Boodle, L. A. — Stem-Structure in Schizaeaceae, Gleicheniaceae, and 
Hymenophyllaceae 624 
Campbell, D. H. — A peculiar Embryo-sac in Peperomia pellucida . 626 
Contents and Index v 
Darwin, F. — The Botanical Work of Darwin. (With Portrait.) . ix 
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