546 
The Ohio Naturalist. 
[Vol. XV, No. 8, 
contained in the storage tissue of the rays estimated from plani- 
meter measurements of projected drawings. In all cases Picea 
showed little or no starch in its woody tissues, while Larix con¬ 
tained starch in all of its corresponding living parts. The highest 
relative amount of starch was found in the dwarf branches where 
Fig. 3. Fig. 4. 
Fig. 3. Curve showing variation in size of ray pits of Larix occidental^, 
through one annual ring of 16 traeheids, commencing with earliest formed 
tracheid of spring wood and ending with last formed traeheid of summer 
wood. Vertical scale, diameters squared. 
Fig. 4. Curve showing variation in size of ray pits of Larix laricina, 
through one annual ring of 11 traeheids, on same scale as Fig. 3. 
the rays were stored to their full capacity, but varying amounts 
of starch were found in all other portions where the wood was 
living. Rays of the sapwood zone, which was fifteen rings in 
width in the lower portion of the trunk, contained starch through¬ 
out the width of the zone. In some portions, 2% of the volume 
of sapwood was starch, though the rays in this portion of the tree 
