Lundia
publication ID |
https://doi.org/ 10.5252/adansonia2023v45a12 |
DOI |
https://doi.org/10.5281/zenodo.8015267 |
persistent identifier |
https://treatment.plazi.org/id/039687DC-FFD3-9129-8A13-C3F9FA33AEA2 |
treatment provided by |
Felipe |
scientific name |
Lundia |
status |
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VII. Lundia View in CoL View at ENA 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 View FIG ) and assemblages present.
Variant phloem
General configuration. Fibrous ( Fig. 10G, I View FIG ), with axial elements in a tangential to diagonal arrangement ( Fig. 10G, I View FIG ).
Sieve-tube elements. As seen in transverse section, each sieve element is associated with one companion cell, rarely two ( Fig. 10I View FIG ). The sieve elements may be solitary to multiples of 2-3 ( Fig. 10I View FIG ). 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 View FIG ). 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 View FIG ).
Rays. The limiting rays are only lignified to the xylem face (10G). 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 View TABLE ). The lenticels are non-stratified, with unlignified filling tissue ( Table 2 View TABLE ).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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