Photosynthesis is Key by Trees Are Key published on 2019-05-22T21:35:20Z Trees are Key Photosynthesis may be the biological life process that most people know about but don’t think about or consider when caring for their trees. Who would ever top a tree if they think about the tree needing leaves to photosynthesize and feed itself? Listen to this week's episode to learn more. Species Spotlight The Nuttall Oak (Quercus texana) is a deciduous Texas native. Nuttall bark is smooth and gray to black, thin, breaking into scaly plates on larger trunks. Nuttall Oak can be found along the edges of forested wetlands, sloughs, terraces, and moist sites along major river systems in southeast Texas.