| The Seedless Vascular Plants consist of four
main Divisions; Pterophyta
(ferns), Psilophyta, Lycophyta, and Sphenophyta. These plants all
share the common evolutionary trait of vascular tissue; specialized
transport tissue found in most "modern" plants. This means the
plant can now transport water and soil nutrition more efficiently
allowing for greater complexity in plant structure including height and
the ability to support a more complex structure of photosynthesis,
leaves. Xylem and phloem, the two major types of vascular tissue,
each transport water and nutrition, respectively, to the upper regions
of the plant from the root system. The Vascular Seedless plants
are the most evolutionarily advanced plants aside from the seeded
plants.1 |
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