Abstract

• Mirabilis jalapa L. belongs to the family Nyctaginaceae. In this paper, identification of plant is carried out by using available literatures. Morphological and histological characters of leaves, stems, rhizomes and roots were also carried out by using microscope. In morphological study, the plant is perennial herbs. Leaves opposite. Inflorescences terminal cymes. Flower bracteolate (5-sepaloid ) and hypogynous. Perianth fused. Stamen shortly connate around the ovary. Placentation is basal. In microscopical study, the anticlinal wall of lower surface of lamina is wavier than upper. Anomocytic stomata present only in lower surface of lamina. Vascular bundles of lamina, midrib, and petiole are collateral, medullary bundles also present in middle of midrib and petiole. Raphides are present in mesophyll layer of lamina and also in cortical region of midrib and petiole. In stem, vascular bundles are collateral and medullary bundles are scattered in the ground tissue. In rhizome, vascular bundles are collateral. Rhaphides and starch grains are present. In root, vascular bundle is diarch. Raphides found within the pericycle layer in circular manner. The powered sample has been investigated and presented as diagnostic characters for the standardization of powdered drugs.