Other noteworthy species include: Douglas fir Pseudotsuga menziesii, western hemlock Tsuga heterophylla, tan oak Lithocarpus densiflorus, grand fir Abies grandis, Sitka spruce Picea sitchensis, madrone Arbutus menziesii, big leaf maple Acer macrophyllum, California laurel/bay Umbellularia californica, of which the tallest stands occur on the alluvial flats and terraces along larger streams.    From Wordnik.com.  [Redwood National Park, United States] Reference