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Seedless Vascular Plants (Distinguishing Traits from Bryophytes (Leaves…

- - - - some species have reduced leaves that seem to have evolved from megaphylls
      - leaves with a highly branched vascular system (think veins)
  - - - lignin in cell walls to strengthen
      - conducts water and nutrients up from roots
    - - cells arranged into tubes
      - Distributes sugars, amino acids, products synthesized by the plant (think top down)
  - - - in many gymnosperms groups of sporophylls form cone like structures called strobili
      - modified leaves that bear sporangia