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 Change and that not all the employees would retain their jobs. In a partnership with Conservation International, Seeds of Change seeks to strengthen and protect traditional shade cropping cabruca cacao cultivation in Brazil. The 1% Fund also supports the Environmental Working Group, the Organic Trade Association, the Organic Center, and the Organic Farming Research Foundation. Seeds of Change Seeds of Change is an organic seed and food company owned by Mars, Inc. Until summer 2010, the company was based in Santa Fe, New Mexico, and producers of a line of processed organic foods including pasta sauces and salad dressings. Seeds of