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| Description: The rings visible in the heartwood and sapwood are regions of early and late wood. In most temperate zone trees, one ring forms each year. Early and late wood in an ash tree. Early wood forms during wet springs. Late wood indicates that a tree did not waste energy making large-diameter xylem cells for water uptake during a dry summer or drought. Picture Stats: Views: 449 Filesize: 522.5kB Height: 926 Width: 1500 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=47948 |