This micrograph shows a detail of part
of the stem, and two adjacent vascular bundles.
The epidermis (EP) is
thin-walled and beneath this are four-five rows of
chlorenchyma. The cortex is separated from the stele
by a starch sheath (SS) and immediately
beneath this, are very conspicuous phloem fibre caps
(PF), which overlie a narrow band of
predominantly primary phloem (P). A fascicular
cambium zone (CZ) has produced a few
secondary xylem elements, but apparently, no secondary
phloem (inset, below right). The stele (St)
is entirely parenchymatous.