Evolutionary history of plants phloem on the outside. Since xylem cells comprise dead, lignified tissue, subsequent rings of xylem are added to those already present, forming wood. The first plants to develop secondary growth and a woody habit, were apparently the ferns, and as early as the Middle Devonian one species, "Wattieza", had already reached heights of 8 m and a tree-like habit. Other clades did not take long to develop a tree-like stature. The Late Devonian "Archaeopteris", a precursor to gymnosperms which evolved from the trimerophytes, reached 30 m in height. The progymnosperms were the first plants to develop true wood, grown from
Seeds of Yesterday (film) Seeds of Yesterday (film) Seeds of Yesterday is a television film released on April 12, 2015 produced by Lifetime based on the 1984 novel of the same name. Thirteen years after "If There Be Thorns", Cathy and Chris arrive at Foxworth Hall, which has been re-built by Bart, for his 25th birthday party. Bart has remained obsessed with Malcolm and has an estranged relationship with his mother and uncle/step-father due to their incestuous relationship. He's even changed his last name to Foxworth in order to emphasise his distance from them. His anger and hatred is particularly aimed towards Chris, though