Contr. Nat. Herb., Voi. XI. 



Plate I. 



Giant Cedars (Thuja PLiCATAi. 



In moist land near Elbe. Shield ferns ( polysticlium inunitum) in the foreground and hemlocks 

 (Tsuga heterophylla) in the background. Keproduced by courtesy of the Forest Service. 



