IV 
Contents . 
PAGE 
Pearson, H. H. W. — On the Microsporangium and Microspore of Gnetum, with some 
Notes on the Structure of the Inflorescence. With Plate LX and six Figures in the 
Text 603 
Thoday (Sykes), M. G. — Note on the Inflorescence Axis in Gnetum ..... 621 
NOTE. 
Farmer, J. B. — Telosynapsis and Parasynapsis . .... .623 
No. CIII, July, 1912. 
Kershaw, E. M. — Structure and Development of the Ovule of Bowenia spectabilis. With 
Plate LXI and sixteen Figures in the Text 625 
Bailey, Irving W. — The Evolutionary History of the Foliar Ray in the Wood of the 
Dicotyledons : and its Phylogenetic Significance. With Plates LXII and LXIII . 647 
Browne, Isabel M. P. — Contributions to our Knowledge of the Anatomy of the Cone and 
Fertile Stem of Equisetum. With Plates LXIV and LXV and ten Figures in the Text 663 
Beer, Rudolf. — S tudies in Spore Development. II. On the Structure and Division of the 
Nuclei in the Compositae. With Plates LX VI and LX VII ..... 705 
Lee, E. — Observations on the Seedling Anatomy of Certain Sympetalae. I. Tubiflorae. 
With Plate LXVIII and eight Figures in the Text 737 
Bachmann, Freda M. — A New Type of Spermogonium and Fertilization in Collema. 
With Plate LXIX 747 
Blackman, V. H., and Welsford, E. J. — The Development of the Perithecium of Poly- 
stigma rubrum, DC. With Plates LXX and LXXI 761 
Schwartz, E. J. — Observations on Asarum europaeum and its Mycorhiza. With Plate 
LXXII 769 
Holden, H. S. — Some Wound Reactions in Filicinean Petioles. With Plates LXXIII and 
LXXIV and one Figure in the Text 777 
Betts, Annie S. — A Bee-hive Fungus, Pericystis alvei, Gen. et Sp. Nov. With Plates LXXV 
and LXXVI 795 
Spratt, Ethel Rose. — T he Formation and Physiological Significance of Root Nodules in 
the Podocarpineae. With Plates LXXVII-LXXX 801 
Yapp, R. H. — Spiraea Ulmaria, L., and its Bearing on the Problem of Xeromorphy in 
Marsh Plants. With Plates LXXXI-LXXXIII and eleven Figures in the Text . 815 
Mockeridge, Florence A. — Some Conditions influencing the Fixation of Nitrogen by 
Azotobacter and the Growth of the Organism 871 
Miller, Edwin C. — A Physiological Study of the Germination of Helianthus annuus. 
II. The Oily Reserve 889 
Brenchley, Winifred E.— The Development of the Grain of Barley. With twenty-two 
Figures in the Text 903 
Lee, D. G. — Notes on the Anatomy and Morphology of Pachypodium namaquanum, Welw. 
With Plate LXXXIV and eight Figures in the Text ...... 929 
NOTES. 
Saxton, W. T. — Note on an Abnormal Prothallus of Pinus maritima, L. With one Figure 
in the Text 943 
Dummer, R. A. — Peloria in Saintpaulia ionantha, Wendland, and Chorisis in Aristea dicho- 
toma. With three Figures in the Text 946 
Clark, J. J.— Abnormal Flowers of Amelanchier spicata. With twelve Figures in the Text 948 
Johnson, J. Charles.— O n Well-marked Aerotropic Growths of Bacillus megatherium . 949 
Gibson, R. J. Harvey. — T he Extent of the Root-system of Cucumis sativus . . -951 
No. CIV, October, 1912. 
Thoday (Sykes), Mary G., and Berridge, Emily M. — The Anatomy and Morphology 
of the Inflorescences and Flowers of Ephedra. With Plate LXXXV and twenty- 
one Figures in the Text 
953 
