Chir Pine ( Pinus roxburghii) is a tree in lower Himalayas (elevation from 800m to 1900m). Chir pine plantations were raised by Britishers mainly to obtain resin. Pinus , commonly known as pine trees, belongs to the family Pinaceae and encompasses a diverse group of evergreen conifers. These trees exhibit a wide range of heights, typically varying from 3 to 80 meters, with many species commonly reaching between 15 to 45 meters. The document provides details about the structure and features of pine trees ( Pinus ). Key points include: - Pine trees are coniferous evergreen trees that are important forest makers. They have a taproot system and produce dimorphic branches and leaves. - The internal structure of pine needles, roots, and stems show adaptations for photosynthesis, conduction, storage, and protection. Pine needles have epidermis, mesophyll and stele tissues. Roots and stems develop secondary tissues over time ... Pinus Pinus , the predominant genus in the Pinaceae family, boasts 90 to 100 species globally. They usually grow on hill slopes, these evergreen trees form dense forests in North Temperate regions, extending to sub-arctic and tropical hills. 1.0 Classification Of Pinus The systematic position of the Pinus genus, commonly known as pine, involves several taxonomic levels are as follows
