To protect this venerable old tree, the U.S. Forest Service refuses to give its location or identity within the Methuselah Grove—as does the scientist who recently discovered an even older ...

A clade or monophyletic group is easy to identify visually: it is simply a piece of a larger tree that can be cut away from the root with a single cut (Figure 4a). Accordingly, if a tree needs to ...

Humboldt County conservation groups announced that they were ... challenges that aim to protect old-growth redwood trees in Richardson Grove State Park while Caltrans works to expand scant ...