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loblolly pine
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A cross section of a Douglas fir (Pseudotsuga menziesii) tree trunk shows annual growth rings, with labeled points marking key life events such as seedling growth, insect damage, fire, and mature stages. Small illustrations around the trunk depict these events, including a young seedling, growing tree, insect infestation, fire damage, and the tree's mature and dead forms.
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loblolly pine

tree
Also known as: Pinus taeda
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A cross section of a Douglas fir (Pseudotsuga menziesii) tree trunk shows annual growth rings, with labeled points marking key life events such as seedling growth, insect damage, fire, and mature stages. Small illustrations around the trunk depict these events, including a young seedling, growing tree, insect infestation, fire damage, and the tree's mature and dead forms.
growth of Douglas fir tree Annual growth rings of a tree trunk

(A) A Douglas fir (Pseudotsuga menziesii) is born. (B) Growth is rapid, forming relatively broad, even rings. (C) “Reaction wood” is formed to help support the tree after something fell against it. (D) Growth is straight but crowded by other trees. (E) Competing trees are removed, and growth is again rapid. (F) Fire scars the tree. (G) Narrow rings are caused, probably by a prolonged dry spell. (H) Narrow rings may have been caused by an insect.

The loblolly pine (Pinus taeda) is a pine tree native to the southeastern United States. It is characterized by its flaky bark, long needles that grow in groups of three, and cones with spine-tipped scales. Pines, in general, are important evergreen conifers belonging to the genus Pinus. They are significant components of various forest ecosystems worldwide and provide habitat and food sources for wildlife. Pines are economically valuable for their timber, used in construction and paper production, and also yield turpentine, rosin, and oils.12

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