VI 
Contents. 
Boodle, L. A. — On some Points in the Anatomy of the Ophioglosseae. 
(With Plate XX) 377 
De Vries, H. — On Biastrepsis in its Relation to Cultivation . . 395 
Farmer, J. B., and Freeman, W. G. — On the Structure and Affinities 
of Helminthostachys zeylanica. (With Plates XXI-XXIII) 421 
Hartog, M. — The Alleged Fertilization in the Saprolegnieae . . 447 
NOTES. 
Hanna, H. — The Plurilocular Sporangia of Petrospongium Berkeleyi. 
(With Figure) 461 
Ito, T. — Some remarkable Marine Monocotyledons in Japan . . 464 
Rhizophoreae in Japan 465 
Floating- Apparatus of the Leaves of Pistia Stratiotes, L. . . 466 
No. LII, December, 1899. 
Harper, R. A. — Cell-Division in Sporangia and Asci. (With Plates 
XXIV-XXVI) 467 
Worsdell, W. C. — Observations on the Vascular System of the Female 
‘ Flowers ’ of Coniferae. (With Plate XXVII) . . . 527 
Ward, H. Marshall — S ymbiosis 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, Harold. — T he 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 Sigil- 
laria ........... 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-viii 
Darwin, F. — The Botanical Work of Darwin. (With Portrait) . ix 
