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A MICROMORPHOLOGICAL STUDY OF POGOSTEMON DESF. SPECIES (LAMIACEAE) FROM BANGLADESH

SYEDA S. TAHIR*, MAHBUBA KHANAM AND SYED Z. HUSAIN

Abstract: An investigation of leaf, calyx and nutlet microcharacters of 13 species of the genus Pogostemon found in Bangladesh was conducted using the SEM and their reliability as taxonomic markers is discussed. Leaf surfaces are mostly covered with glandular and non-glandular trichomes. Stomata are paracytic mostly levelled with epidermal surface or rarely elevated. In some species leaf surface is rough and have undulating ridges under which sessile glandular hairs are sunken. Calyx surface of all the species have trichomes. Nutlet sculpturing shows mostly reticulate or irregular shallow discoid pattern with undulating ridges.

School of Plant Sciences, University of Reading, P.O. Box 221, Reading, RG6 2AS, England.
Corresponding Author: Department of Botany, University of Sindh, Jamshoro, Sindh, Pakistan.