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Key B: gymnosperms

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1 Leaves 1-pinnately compound
1 Leaves simple.
  2 Leaves broad and fan-shaped, > 30 mm wide, with conspicuous dichotomous venation, seasonally deciduous
  2 Leaves needle-like or scale-like, < 10 mm wide, evergreen (seasonally deciduous in Larix and Taxodium)