Trees have been in existence for 370 million years. Due to anchored roots and woody trunks, they can survive in harsh climatic conditions, such as cyclones and heavy winds. A woody trunk is formed by secondary growth, meaning that the trunk thickens each year by growing outwards. Herbaceous plants (ferns and monocots) such as palms, bamboo, and papaya do not have secondary growth, and they may “pseudo-wood” by lignifying cells formed by primary growth. In the present work, around 60-year-old palm tree (Arecaceae Family) is considered for the work and observed variation in the type of fibers and amount of fibers along the thickness and length direction. The fibers at the trunk’s center portion are soft and less in number, and they are hard and more in number in the outer portion. The physical and mechanical properties of the trunk vary along the cross-section, and the trunk resembles a functionally graded material. The tensile test specimens are made at radii of 7, 8, 9, and 10 cm, and compressive test specimens are made from 5 to 10 cm in steps of 1 cm. The density variation along the cross-section is also obtained, and the value increases with radius. The specific density values at 2 cm and a radius of 10 cm are 0.4 and 1.2, respectively. The mechanical tests are conducted as per ASTM standards using ZwickRoell UTM. The tensile and compressive results show increased strength and modulus from the inner to outer radius. The outermost radius (close to the cortex) has maximum strength, and at the center, strength is lower. Tree experiences bending during heavy winds, and requires good bending stiffness. The present work concludes that the trunk possesses good strength and stiffness at the outer radius and can withstand bending. Hence, the palm tree trunk has the desired properties in the required position, making it a naturally formed functionally graded structure.