CONTENTS. XXIU 



Section K.— BOTANY. 



THURSDAY, SEPTEMBER 10. 



Page 

 Address by A. C. Sewaed, M.A., F.RS., President of the Section 824 



1. Keport of the Committee on the Teaching of Botany in Schools (p. 420) 849 



2. Report of the Committee on the Investigation of the Oyanophjcese 



(p. 419) 849 



3. Report of the Committee on Botanical Photographs (p. 416) 849 



4. *Report of the Committee on the Respiration of Plants 849 



6. The Development of the Ascocarp in Ryparohiua, By B. T. P. Barker, 

 M.A 849 



6. Culture Experiments with Biologic Forms of the Erysiphacece. By 



E. S. Salmon 850 



7. "Willow-canker. By Professor T. Johnson, D.Sc, F.L S 850 



8. On the Occurrence of Ulua laiissima and Enteromorp/ta compressa in 



Sewage Effluents, and on Variations in the Composition of the Tissues 

 of these and Allied Seaweeds. By Professor Letts, D.Sc, Ph.D., and 

 J. S. ToTTON,B.A 851 



9. On the Colonisation of a Dried River-bed. By Miss M. C. Stopes 852 



10 *The Botany of Upper Peru. By A. W. Hill, M.A 853 



FRIDAY, SEPTEMBER 11. 



1. *New Discoveries in Heredity. By AV. Bateson, F.R.S 853 



2. * Results of some Cross-breeding Experiments with Plants. By Miss 

 Edith Saundeks 853 



3. Recent Experiments in the Hybridisation of Orchids. By Chaeles C. 



Htiest 853 



4. *La flenr des Gnetacees. By Professor Ligniee 854 



5. 'Parthenogenesis in 6r?ze^Mm w/a. By Dr. Lorsr 854 



6. The Sandhill Vegetation of Birkdale. By Otto V. Daebishiee 854 



7. The Histology of the Sieve Tubes of Angiospenns. By Aethur W. 

 Hill, M.A 854 



8. The Structure of Leaves of the Bracken from difl'erent habitats. By 



L. A. Boodle 855 



MOiYDAY, SEPTEMBER 14. 



1. Discussion on the Evolution of Monocotyledons 855 



i. The Evolution of Monocotyledons. By Ethel Saegant 855 



ii. A Consideration of the Bearing of Fertilisation Phenomena and 

 Embryo Sac Structure on the Origin of Monocotyledons. By Ethel 

 N. Thomas ". 857 



2. *0n Stimulus and Mechanism as Factors of Organisation. By Professor 



Faemee, F.R.S 868 



3. Alternation of Generations in the Uictyotaceci; and the Cytology of the 



Asexual Generation. By J. Llotd Williams 858 



