FIG. 17 in Bark anatomy of lianescent Bignoniaceae: a generic synopsis

FIG. 17. — Secondary phloem of Adenocalymma mirabile: A-C, Adenocalymma mirabile transverse-sections; A, regular phloem. Thin to thick fiber bands. Periderm with stratified phellem, with alternating thin and thick-walled, lignified cells. Phelloderm thick, with over 3 cell layers; B, overall view of the variant phloem. Non-fibrous to semi-fibrous phloem. Fiber bands thin to thick, U-shaped in several portions. Limiting ray lignified to both xylem and phloem face; C, detail of the variant phloem. Rays alternate in being lignified or not. Prismatic crystals present in rays (arrowheads). Sieve tubes in short radial or tangential multiples. Abbreviations: pe, periderm; x, secondary xylem. Scale bars: A, C, 200 μm; B, 300 μm.