106 THE JOUKNAL OF INDIAN BOTANY. 



Structure of the Axis .'—The epidermal cells are small and poly- 

 gonal, with outer walls greatly thickened and convexly arched 

 outwards. The cortex is characterised by subepidermal cork and by 

 collenchyma. The assimilatory tissue is formed of chlorenchyma. 



The pericycle in M. Denhamii is formed of an outer ring of 

 groups of stone-cells and of an inner ring of radially elongated groups 

 of bast fibres. The groups of stone-cells and of bast fibres are 

 separated by colourless parenchyma. In M. magnifolia the pericycle is 

 formed of a loose ring of groups of stone-cells. 



The wood is composite and is much narrowed at two opposite 

 points which probably represent the plane at right angles to that which 

 is affected by the prevailing wind. The vessels in the broader portion 

 are larger and less numerous. The wood in M. magnifolia is compo- 

 site and is of uniform breadth. Interfascicular wood prosenchyma 

 is extensive and is composed of cells with thick-walls and small 

 lumina. Medullary rays in ill. Denhamii are 1-3 seriate, broadening 

 outwards in the form of wedges between the groups of soft bast and 

 are in contact with parenchymatous cells separating the groups of 

 stone-cells and of bast fibres. Medullary rays in M. magnifolia are 

 uniseriate. 



The pith is distinguished by the occurrence of mucilage canals 

 and is composed of thin-walled cells. 



TILIACEAE. 



Grewia populifolia Vahl.— Front cavity placed in depres- 

 sions formed by the thickened outer epidermal walls, Solitary 

 crystals few and occurring near the veins and in the cortex. Veins 

 vertically transcurrent above and below by sclerenchyma. Clothing 

 hairs tufted. Glandular hairs club-shaped with the head divided by 

 horizontal and vertical walls. Pericycle forming a composite ring of 

 stone-cells. Medullary rays uniseriate. 



Grewia villosa Willd. — Front cavity on a level wifch the surface. 

 Solitary crystals numerous and occurring near the veins, in the 

 cortex and pith. A few conglomerate crystals present near the veins. 

 Veins vertically transcurrent above by sclerenchyma 'and below by 

 bundle-sheath cells. Clothing hairs tufted. Glandular hairs club- 

 shaped with the head divided by horizontal and vertical walls. Cork 

 subepidermal with one or two layers of thickened and lignified cork- 

 cells at its lower end. Pericycle formed of a composite ring of' 

 stone-cells. Medullary rays 1-2 seriate. 



Grewia abutilifolia Vent.— Figs. 63, 64. Front cavity on 

 a level with the surface. Solitary crystals few and occurring near 



