A pine is any conifer in the genus Pinus of the family Pinaceae. Pinus is the sole genus in the subfamily Pinoideae. Pine trees are evergreen, coniferous resinous trees (or, rarely, shrubs) growing 3–80 m (10–260 ft) tall, with the majority of species reaching 15–45 m (50–150 ft) tall. Pines are long lived and typically reach ages of 100–1,000 years, some even more.

The picture shows a transmitted light microscope image of a cross-section of a young pine stem.

Some information in this copy may have been obtained from the online resource: Wikipedia: The Free Encyclopedia.

Learn more:  https://en.wikipedia.org/wiki/Pine