<i>Brachypodium distachyon</i> internal stem internode anatomy with emphasis on vasculature.

<p>(<b>A</b>) Cross section of whole stem and (<b>B</b>) higher magnification of the first stem internode. Red, inner vascular bundles; pink, outer vascular bundles; cyan, interfascicular region compromised mostly of sclerenchyma fibers; gray, pith; lime green, chlorenchyma and sclerenchyma cells comprise the cortex; brown, epidermis. (<b>C</b>) Vascular bundle illustration at high magnification. Green, bundle sheath (BS); purple, phloem (P); vermilion, companion cells; tan, xylem vessels (XV); red, xylem tracheids (XT); white, lacuna (Lc); orange, xylem parenchyma cells (XP); gray, parenchyma cells (Py); blue, sclerenchyma fibers (SF). (<b>A-B</b>) Bar = 0.1 mm, (<b>C</b>) bar = 0.01 mm.