16 NINETEENTH REPORT. 



SECTION OF BOTANY 



G. H. Coons, Chairman 



Room B 207, Natural Science Building 



Wednesday, March 28, 3:00 v. m., and 

 Thursday, March 29, 9:00 a. m. and 1:30 i'. m. 



*1. The Effect of Various Conditions of Shade and Moisture upon the Growth 

 of Some Coniferous Seedlings. Paul C. Kitchin. 15 minutes. 



2. Woodlot Studies. Prof. O. L. Sponsler. 30 minutes. 



3. The Taxonomy of the Genus Mucor. Dr. A. H. \V. Povah. 10 minutes. 



*4. Unreported Michigan Fungi for 1914-1915. Dr. C. H. Kauffman. 



*5. Hosts and Woody Substrata of Basidiomycetes Occurring in Michigan. Dr. 

 C. H. Kauffman. 



6. A Parasitized Mucor. F. B. Cotner. 



7. A Segregate of the Genus Sphaeronema. Leon Leonian. 



8. (a) A Peculiar Vegetative Growth in an Ascomycete. 

 *(b) Polyembryony in Quercus alba. 



*(c) Intra-microsporangial Development of the Tube in the Microspore of 

 Pinus sylvestris. Prof. LeRoy H. Harvey. 15 minutes. 



*9. Notes on Michigan Collections of Myxomycetes. Prof. Henry C. Beardslee. 

 10 minutes. 



*10. Physiological Balance in the Soil Solutidn. Dr. R. P. Hibbard. 10 minutes. 



11. Experimental Methods in Plant Nutrition: The Influence of Methods upon 

 Physiological Responses. Dr. R. P. Hibbard. 10 minutes. 



*12. The Relation of Temperature to Crops. D. A. Seeley. 



13. The Big Trees of California. Dr. H. A. Gleason. 20 minutes. 



*14. Ecology of the Crystal Lake Bar Region. W. G. Waterman. 30 minutes. 



15. A Coniferous Sand-dune in Cape Breton Island, Nova Scotia. Prof. LeRoy 



H. Harvey. 



16. A Prairie near Ann Arbor. Dr. H. A. Gleason. 5 minutes. 



17. A Peculiar Type of Succession Caused by Polytrichum. Dr. H. A. Gleason. 



10 minutes. 



*18. The Forest Associations of Wayne County, Michigan. Prof. Forest B. H. 

 Brown. 20 minutes. 



•19. The Flora of a Wayne County Salt Marsh. Prof. Forest B. H. Brown. 



*20. Systematic Botany. Dr. W. J. Beal. 



•21. Young, H. C, and Cooper, E. H. A Method for Determining the Fungi- 

 cidal Coefficient of Limc-Suljilmr and other Common Fungicides. 



22. A Short Sketch of Early Botanical Exploration in Michigan. Prof. H. T. 

 Darlington. 10 minutes. 



Papers marked with a * are printed in this report. 



