Pinus is a genus of hardy, evergreen trees. Pictured are the strengthening cells (1), ducts surronded by strengthening cells (2), wavy chlorophylla bearing cells (3), bundle sheath (4), fibro-vascular bundle (5), stomata (6), and internal duct (7).

Transverse Section of Pinus Excelsa Leaf

Pinus is a genus of hardy, evergreen trees. Pictured are the strengthening cells (1), ducts surronded…