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
Adler Seeds Adler Seeds Adler Seeds is an American company that was founded in 1937 by Howard Adler, in Sharpsville, Indiana. Adler Seeds was formerly known as George Adler & Sons until later when it was then incorporated and called Adler Seeds. By 1993 Howard Alder had resigned and decided to pass on the company to John Adler, his son. In 2005, it merged with Kelley Farms. Adler's developed JavaSoy in 2002, which is a soy/coffee blend that is marketed through their Adler Foods company. After a fire at its seed facility, Adler Seeds sold its facility and farm ground to Beck's