Abstract
AbstractThe macroscopic and microscopic characters of the stem bark and leaf of Psidium guajava L. are described. The mature bark is non-fibrous and is characterized by the presence of a variety of crystals of calcium oxalate, tannins and starch. The lenticels are of small size and found slightly protruded above the surface. The phloem rays are uni- to tetraseriate and vary in height from 1–38 cells. The trichomes on the leaf epidermis are unicellular and vermiform. Stomata occur uniformly all over the abaxial surface. Mucilaginous cavities of lysigenous nature occur below the epidermis in young shoots, petiole and mesophyll of leaves. The ash and extractive values of the bark were also determined.
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