The sieve cells are small and with thin, white, angled walls.
The phloem parenchyma cells resemble the sieve cells, but they are larger.
The bast fibres occur singly or in groups of two or three. The walls are white, non-porous, and non-striated.
Cambium. The cambium layer is composed of rectangularly shaped cells, which are frequently obliterated.
Xylem. The xylem contains vessels, wood parenchyma, and medullary rays.
The vessels are large, rounded cells with thick walls.
The wood parenchyma consists of thick-walled cells of irregular size and form.
The medullary rays are tangentially elongated and rectangular in form.
Pith parenchyma. The pith parenchyma cells are rounded in outline and as large as the cortical parenchyma cells.