Aspects of this topic are discussed in the following places at Britannica.
...of latewood. Once the drought conditions have passed, the radial diameters of the cells of the secondary tissues will increase, creating the appearance of a new annual ring. This, however, is a false ring, because there is a gradient of increasing cell-wall thickness and decreasing cell diameter at the start of the false ring and another gradient of decreasing cell-wall thickness and...
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