| (1) Leaves Needle-Shaped or Scalelike
- (2) Leaves in Clusters of Two or More Needles
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 Five delicate needles per cluster -
 Needles two per cluster, bluish green
- (2) Leaves Not in Clusters
- (3) Leaves Needle-Like or Strap-Shaped
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 Flattened needles ot two types; light stripes on under-surface -
 Deep green needles above, pale but not while-striped on under surface; red arils when mature -
 Bluish-green needles spirally arranged on twig -
 Green to dark green needles spirally arranged on twig - (3) Leaves Scale-Like
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 Flat, yellow-green, scalelike leaves appressed to stem; cones with scales -
 Flat, scalelike leaves appressed to stem; or, sharp needle shaped leaves in young trees
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