So said the eminent Harvard botanist Asa Gray, on page 451 in his encyclopedic “Lessons in Botany and Vegetable Physiology,” a book published in 1872. I got my copy at an old bookstore several years ...

Rotational-fit methods were used to examine shape variation in oak leaf morphology by reference to a set of 14 landmarks for each leaf. Within-tree, between-tree, and between-species variations were ...

Many coast live oak (Quercus agrifolia) trees are showing unusual browning in their canopies in the last month or two. If you look carefully, you may see small, crescent-shaped galls forming on the ...

A new study published in Forest Ecosystems has found that two evergreen oak species in the Himalayan-Hengduan Mountains region adapt to their environments in very different ways by changing how their ...

DALLAS — The winter freeze this February was a tough test for trees across North Texas, and we're still seeing the impact months later. If your trees appear to be dying now, there's a good chance it ...

A combined genetic and morphometric approach was used to study leaf shape and size variability among three sympatric and interfertile white oak species (Quercus frainetto, Quercus petraea, and Quercus ...