Bark anatomy of lianescent Bignoniaceae: a generic synopsis Author Pace, Marcelo R. Author Marcati, Carmen R. Author Lohmann, Lúcia G. Author Angyalossy, Veronica text Adansonia 2023 3 2023-05-30 45 12 167 210 journal article 10.5252/adansonia2023v45a12 1639-4798 8006364 VII. Lundia clade TAXONOMIC INFORMATION . — This clade contains a single genus, Lundia , with multiple of four phloem wedges in transversal section. TOTAL NUMBER OF SPECIES IN THIS CLADE . — 13 species ( Lohmann & Taylor 2014 ; Kaehler & Lohmann 2021a ). STUDIED SPECIES . — Five species, Lundia longa (Vahl) DC. , L. damazioi C.DC., L . densiflora DC. , L. virginalis DC. , and L. nitidula DC. Regular phloem Thin fiber bands ( Fig. 10H ) and assemblages present. Variant phloem General configuration. Fibrous ( Fig. 10G, I ), with axial elements in a tangential to diagonal arrangement ( Fig. 10G, I ). Sieve-tube elements. As seen in transverse section, each sieve element is associated with one companion cell, rarely two ( Fig. 10I ). The sieve elements may be solitary to multiples of 2-3 ( Fig. 10I ). Narrower sieve elements with just one companion cell may be found in a parenchyma band present in all species studied. As seen in longitudinal section, the sieve elements are long (over 1 mm ) and their end walls are inclined, bearing sieve plates with 12-15 sieve areas. Axial parenchyma. The phloem parenchyma is sieve-tube-centric to sieve-tube-centric incomplete, therefore surrounding or partially surrounding the groups of sieve elements ( Fig. 10I ). Furthermore, a parenchyma band composed of 2-3 cells of phloem parenchyma is associated with sieve elements of narrower diameter. The phloem parenchyma tends to form radial rows of 4-6 cells in some places. Fibers. Fibers form the background tissue where all other cells are embedded ( Fig. 10G, I ). Rays. The limiting rays are only lignified to the xylem face (10 G ). The wedge rays have randomly alternating portions lignified and non-lignified. Crystals. Acicular crystals are present in the phloem and ray parenchyma across the entire phloem wedge (absent in Lundia longa ). Periderm A single periderm formed. The phellem is non-stratified, composed of evenly thin-walled cells in Lundia corymbifera and L. virginalis . The phellem is stratified in Lundia longa , with alternating thin and thick-walled cells.The phelloderm is thick, with over three layers of cells, non-stratified ( Table 2 ). The lenticels are non-stratified, with unlignified filling tissue ( Table 2 ).