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 Seeds of Yesterday Seeds of Yesterday is a novel written by V. C. Andrews. It is the fourth book in the Dollanganger Series. The story is once again written from the point of view of the main character, Cathy, following her from the age of 52 until her death a few years later. Cathy was born in April 1945, meaning the events in the book occur between 1997–2001, which was thirteen years into the future at the time the book was originally published in 1984. The film adaptation aired April 12, 2015 on Lifetime. The story begins fifteen years after