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Spiralling in control

  1. Why Do Trees Grow in Spirals? (Washington Trails Association)
  2. A clockwork pine – Now we know why some trees get so wound-up (New Scientist)
  3. Why Do Trees Form Spiral Grain? (The Gymnosperm Database)
  4. Function of spiral grain in trees (Kubler, 1991 Trees)
  5. The cause of the prevalent directions of the spiral grain patterns in conifers (Skatter & Kucera, 1998 Trees)

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