CROSS-SECTION QUASSIA
Plate 105 is a cross-section of quassia. It has the following structure:
Vessels. The vessels occur singly or in groups of two to eight cells. The cells are variable in size and shape. The walls are yellowish white and porous.
Medullary Rays. The medullary rays vary from one to five cells in width.
The medullary ray cells are radially elongated and the walls are strongly porous.
Wood Parenchyma. The wood parenchyma cells have thin, yellowish-white, angled walls.
Wood Fibres. The wood fibres have thick, yellowish-white, angled walls. These cells are smaller in diameter than the wood parenchyma cells.
RADIAL SECTION QUASSIA
The radial section of quassia (Plate 107) is as follows:
Vessels. The vessels appear as in the tangential section.