When you've always known deciduous trees to drop their leaves in winter, seeing one that hasn't can be unsettling. Here's why ...

Find out about common North American trees with pinnate leaves. Learn how to identify hickory, ash, walnut, black locust, and pecan using this guide.

Typical deciduous trees that lose their leaves every winter create a separation zone (abscission layer) between the leaf stem and the branch. This abscission layer, when it spans the entire stem ...

While the leaves of the aspens and birches prepare to die, the spruce trees will remain green all winter long. (Courtesy of Carbone boréal) , Author provided (no reuse) ...

Brown leaves attached to huge white oaks danced in the wind. The long, brownish-yellow leaves of the sumac were complemented by the persistent red berries on this native shrub growing along the trail.

Trees can make some adjustments to their leaves to better survive, but they have limits. “When I think about climate change, I think about plants first, because human survival depends on plants ...

IT has recently been found that four types of vein unions occur in the leaves of Ginkgo biloba L. and that long shoots have a significantly higher average per cent of leaves with anastomoses than ...

These caterpillars are about an inch long and range in color from green to greenish-brown or even black. You will find them actively eating the trees' leaves. Spring (Paleacrita vernata) and fall ...

Spruce trees that experienced long-term droughts were more resistant to future ones, while pines acclimatized to wet periods were more vulnerable.

Trees primarily respond to two natural factors to trigger leaf fall: the length of the day and the drop in temperatures. The duration of daylight, also called photoperiod, is one of the key triggers ...

If you want one of the best trees with red leaves, you'd be wise to consider this one. Widely regarded as one of the best rowans for autumn color, Japanese rowan (Sorbus commixta) has pinnate ...