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VINNIE A. PEASE 
EXPLANATION OF FIGURES 1-13 
Horizontal figures indicate years; vertical figures indicate number of specimens. 
Unless otherwise stated, is curve showing beginning of leaf fall; is curve 
showing greatest leaf fall; is curve showing extreme duration of leaves. 
Fig. I. Pseudotsuga taxifolia, on San Juan Island; mature trees, in the open, on 
leeward slope. 
Fig. 2. Pseudotsuga taxifolia, at Seattle; sapling, in the open. 
Fig. 3. Pseudotsuga taxifolia, at Seattle; mature tree, in the open, after unus- 
ually cold weather. 
Fig. 4. Pseudotsuga taxifolia, on San Juan Island; mature tree, in the open, on 
windward slope. 
Fig. 5. Pseudotsuga taxifolia, at Seattle; mature tree, in the open. 
Fig. 6. Tsuga heterophylla, at Seattle; mature tree, in peat bog. 
Fig. 7. Tsuga heterophylla, on San Juan Island; mature tree, in the open. 
Fig. 8. Tsuga heterophylla, at Seattle; mature tree, in the open. 
Fig. 9. Abies grandis, on San Juan Island; sapling, in the shade. 
Fig. 10. Abies grandis, on San Juan Island; sapling, in the open. 
Figs, ii and 12. Thuja plicata, on San Juan Island; mature trees; Fig. 11 in 
the shade. Fig. 12 in the open is curve of loss of green color; is curve of 
beginning of leaf fall; is curve of extreme leaf duration. 
Fig. 13. Vaccinium ovatum, at Seattle. is curve of extreme leaf duration 
in shade; is curve of extreme leaf duration in open. 
