Description Simple leaves about 3-9 inches long with ... which have sharp tips and can be all different sizes. Black oak trees produce the most seeds between 40 and 75 years.

Leaves come in many different shapes and sizes ... are great sources for tree identification. The acorn of an oak tree, for example, is a seed—but completely different from a maple's samara.

But if the leaves start to turn yellow during the tree's ... oak dieback. Oak decline disease is not just limited to one particular species and has been observed in numerous different trees ...

In North America, there are about 90 different oak species ... Of the numerous insects that dine on the acorns, leaves and leaf litter under an oak tree, the most important might be the moths ...

There are different types of ... slow-to-decompose leaves that cascade down from oaks each autumn and you may start to wonder whether these trees are worth all the trouble of cleaning up after ...

The terms refer to the growth habit of different tomato varieties ... form on the undersides of the leaves. The presence of galls on the foliage of trees is fairly common and the damage is ...

Every autumn, the leaves drop off and oak trees become bare ... An animation illustrating the different stages in plant development. The life cycle of a dandelion. videoThe life cycle of a ...