Photo by W. L. Bray. 
Fic. 7. Reproduction of mountain paper birch (Betula cordifolia Regel) 
red spruce and balsam on a burn on Dibble mountain in the Catskills at 3,600 
feet elevation. 
Photo by W. L. Bray. 
Fie. 8. A pure stand of Hguwisetum fluviatile occupying shallow water ad- 
jacent to cat-tail marsh, marsh-meadow and swamp forest at Tully Lake. 
