Campsis radicans

Non-stratified phloem (Fig. 19A), marked by scattered fibers (Fig. 19 A-C). The conducting phloem has sieve tubes solitary or in multiples of 2-4 (Fig. 19C). One companion cell lying on the corner of the sieve tube (Fig. 19C). The sieve plates are simple in transverse walls, or with 2-4 sieve areas per sieve plate in a slightly inclined wall. The axial parenchyma constitutes the background tissue (Fig. 19B, C), with parenchyma strands with 3-4 cells. Rays straight (Fig. 19A), 2-3-seriate, heterocellular, with body of procumbent cells and two square to upright marginal cells, lacking dilatation (Fig.19A). Sclerenchyma composed of scattered fibers (Fig. 19A), either solitary (Fig. 19B, C) or in multiples of two, with an angular outline (Fig. 19B). Non-storied. Nonconducting phloem marked by empty sieve elements and companion cells, collapsed. Cell expansion is the main dilatation phenomenon recorded, with no further sclerification.