Fig. 3.

Root and stem anatomical characteristics of Cyperus laevigatus collected from different ecological zones of Punjab. a. Haroonabad Bract TS: Vascular bundles towards periphery, chlorenchyma with sclerification, large cortical cells, larger aerenchyma. b. Haroonabad Leaf sheath TS: Moderately thick leaf sheath, smaller vascular bundles, reduced aerenchyma, sclerification under upper epidermis. c. Khushab Bract TS: Reduced bract with smaller aerenchyma and vascular bundles, smaller cortical cells. d. Khushab Leaf sheath TS: Comparatively thick leaf sheath, larger aerenchyma, minor sclerification under upper epidermis, lower epidermis one-cell layered. e. Jhalar lake Bract TS: Small epidermal cells, vascular bundles towards half periphery. f. Jhalar lake Leaf sheath TS: Very thick leaf sheath, larger vascular bundles, very large aerenchyma, sclerification under upper epidermis and two-cell layered lower epidermis. g. Pakka anna Bract TS: Peripheral and central vascular bundles, many aerenchyma, small and large cortical cells. h. Pakka anna Leaf sheath TS: squished leaf sheath at some points, larger aerenchyma, vascular bundles of varied size. i. Kalar Kahar lake Bract TS: Both central and peripheral vascular bundles, one large & two small aerenchyma. j. Kalar Kahar lake Leaf sheath TS: Thick leaf sheath, small and large vascular bundles, little sclerification under upper epidermis. k. Sahianwala Bract TS: vascular bundles towards periphery, larger cortical cells, no aerenchyma. l. Sahianwala Leaf sheath TS: Comparatively thin leaf sheath, larger vascular bundles, small aerenchyma, some larger cortical cells.