Figure 1. It may be winter, but these beech trees at Knox State Park in East Aurora, New York still have leaves on them. This is called marcescence.

Treehugger/ Alexandra Cristina Nakamura. Besides its branches, roots, and leaves, a mature tree also grows another important structure—the flower (or cone, in the case of evergreens).

Nowadays, we're still looking at tree leaves, but no longer as food. Instead, our gaze at forests is a source of both seasonal delight and awareness of local ecology.

To identify a tree, it works best if users place a leaf on a white background to photograph. Engineers used facial recognition technology to devise an algorithm that could identify a leaf by its ...

So chlorophyll equals green leaves, and carotenoids equals yellow and orange leaves. HANSON: Yes. And for some trees, right here, this is where the colors stop.

Paulownia flowers are usually set before leaf emergence so they really stand out against a neutral or evergreen background. With its rapid growth rate, the princess-tree can reach 50 feet in ...

Most living organisms adapt their behavior to the rhythm of day and night. Now, using laser scanners, scientists are studying the day-night rhythm of trees. As it turns out, trees go to sleep too.

During photosynthesis, leaves use this water to produce sugars, which are then used in other parts of the tree to build larger molecules such as cellulose. All this while, the ratio of 16O and 18O ...

By Mark Brown, Wired UK A new iPhone app called LeafSnap is a field guide for tech-friendly naturalists. It can identify a tree’s species by analyzing a photograph of its leaf. \[partner id ...