Figure 5.

Anenlarged view of typical vascular bundle from a typical cross section in (a) is shown in (b). Orientation of cellulose microfibrils to the axial direction (according to Parameswaran & Liese [24]) in different lamellae of a fibre cell is shown in (c). An individual lamella in (c) is, in turn, a composite of largely single crystalline cellulose microfibrils in a lignin–hemicellulose complex (d). The reinforcing microfibrils are composed of cellulose chains with unit cell and orientation indicated in (e).