Cottonwood leaves wave at you because of flat petioles скачать в хорошем качестве

Cottonwood leaves wave at you because of flat petioles

The widespread, common, eastern cottonwood tree (Populus deltoides) has leaves that move in a unique way when affected by the breeze. They tend to wave and wiggle more than other trees' leaves. The reason is that the petiole, or the leaf stalk (the skinny part that connects the flat blade of the leaf to the branch) is flattened rather than roundish. Wind is part of cottonwood ecology. The cottony tufts that clog your screens may be the long-distance traveling seeds that were released from upper branches. Cottonwoods are shade-intolerant, you won't find them in forests, instead they are usually found more widely scattered in open habitat.