VI 
Index. 
PAGE 
Dale, Elizabeth. — A Bacterial Disease of Potato Leaves. With Plates XV and XVI . 133 
Davie, R. C. — The Structure and Affinities of Peranema and Diacalpe. With Plates 
XXVIII and XXIX .245 
ue Fraine, E. — On the Structure and Affinities of Sutcliffia, in the Light of a newly 
discovered Specimen. With Plates XCI and XCII and nineteen Figures in the Text 1031 
see Hill, T. G. 
Delf, E. Marion. — T he Attaching Discs of the Ulvaceae. With Plate XLV and three 
Figures in the Text ............ 403 
= — — : Transpiration in Succulent Plants. With one Figure in the Text . 409 
Digby, L. — The Cytology of Primula kewensis and of other related Primula Hybrids. With 
Plates XLI-XLIV and two Figures in the Text 337 
DUmmer, R. A. — Peloria in Saintpaulia ionantha, Wendland, and Chorisis in Aristea 
dichotoma. With three Figures in the Text 946 
A Bisexual 1 Gymnospermous ’ Begonia. With one Figure in the Text . 1123 
Duthie, Augusta V. — Anatomy of Gnetum africanum. With Plates LV 1 I-L 1 X . . 593 
Evans, A. W. — Branching in the Leafy Flepaticae. With thirty-six Figures in the Text . 1 
Farmer, J. B.—Telosynapsis and Parasynapsis 623 
Faull, J. H. — The Cytology of Laboulbenia chaetophora and L. Gyrinidarum. With 
Plates XXXVII-XL 323 
Gates, R. R. — Somatic Mitoses in Oenothera. With Plate LXXXVI .... 993 
Gibbs, L. S. — On the Development of the Female Strobilus in Podocarpus. With Plates 
XLIX-LIII 515 
Gibson, R. J. Harvey. — T he Extent of the Root-system of Cucumis sativus . . .951 
Groom, Percy. — T he Medullary Rays of Fagaceae . . . . . . . .1124 
Hill, A. W. — The Production of Hairs on the Stems and Petioles of Tropaeolum peregrinum, L. 
With Plate LVI and seven Figures in the Text 589 
Hill, T. G., and de Fraine, Ethel. — O n the Seedling Structure of certain Centrospermae. 
With eight Figures and seven Diagrams in the Text 175 
Holden, H. S. — Some Wound Reactions in Filicinean Petioles. With Plates LXXIII and 
LXXIV and one Figure in the Text . . .777 
Holden, Ruth. — R eduction and Reversion in the North American Salicales. With Plates 
XX and XXI 165 
Hume, E. M. Margaret. — T he Histology of the Sieve Tubes of Pteridium aquilinum, with 
some Notes on Marsilia quadrifolia and Lygodium dichotomum. With Plates LIV 
and LV 573 
Johnson, J. Charles. — O n Well-marked Aerotropic Growths of Bacillus megatherium . 949 
Kershaw, E. M. — Structure and Development of the Ovule of Bowenia spectabilis. With 
Plate LXI and sixteen Figures in the Text . 625 
Lee, D. G. — Notes on the Anatomy and Morphology of Pachypodium namaquanum, Welw. 
With Plate LXXXIV and eight Figures in the Text 929 
Lee, E. — Observations on the Seedling Anatomy of Certain Sympetalae. I. Tubiflorae. 
With Plate LXVIII and eight Figures in the Text 727 
MacDougal, D. T. — The Water-balance of Desert Plants. With Plates VI-X . . . 71 
Michell, Margaret Rutherford. — O n the Comparative Anatomy of the Genera Ceraria 
and Portulacaria. With Plate XCVIII and four Figures in the Text . . . 1111 
Miller, Edwin C. — A Physiological Study of the Germination of Helianthus annuus. II. 
The Oily Reserve 889 
Mockeridge, Florence A. — Some Conditions influencing the Fixation of Nitrogen by 
Azotobacter and the Growth of the Organism . . . . . . . .871 
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 
Rled, T. — Some Points in the Morphology and Physiology of Fasciated Seedlings. With 
nine Figures in the Text . . . 389 
Saxton, W. T.— Note on an Abnormal Prothallus of Pinus maritima, L. With one Figure 
in the Text 943 
Schwartz, E. J. — Observations on Asarum europaeum and its Mycorhiza. With Plate LXXII 769 
