210 Pub. Puget Sound Biol. Sta. Vol. 2, No. 46 



9. Possibly free-floating mats of vegetation may also be a means of bog 

 establishment. 



10. Sphagnum bogs develop on different types of soil, the development 

 being slower on excessively drained types. 



Citations 

 Frye, T. C. 



1918. A key to the western Sphagnaceae. Bryologist, Vol. 21, 

 pp. 37-48. 



Hotson, J. W. 



1918. Sphagnum as a surgical dressing. Science, N. S., Vol. 48, 

 pp. 203-209. 



Mangum, A. W., et al. 



1911. Reconnoissance soil survey of the eastern part of the Puget 

 Sound basin, Washington. U. S. Dept. Agric. 



Mangum, A. W., et al. 



1912. Reconnoissance soil survey of the western part of the Puget 

 Sound basin, Washington. U. S. Dept. Agric. 



Nichols, G. E. 



1918. The sphagnum moss and its use in surgical dressings. Jour. 

 N. Y. Bot. Gard., Vol. 19, pp. 203-220. 



Rigg, G. B. 



1913. The effect of some Puget Sound bog waters on the root hairs 

 of Tradescantia, Bot. Gaz., Vol. 55, pp. 314-336. 



Rigg, G. B. 



1914. Notes on the flora of some Alaskan sphagnum bogs. PI. W^orld, 

 Vol. 17, pp. 167-182. 



Rigg, G. B. 



1917. Forest succession and rate of growth in sphagnum bogs. Jour. 

 Forestry, Vol. 15, pp. 726-739. 



Turesson, G. 



1916. Lysichiton camtschatcense (L) Schott. and its behavior in 

 sphagnum bogs. Amer. Jour. Bot., Vol. 3, pp. 189-209. 



