Plant Material
Bignonia magnifica W. Bull, Bignoniaceae, is native to Central
America and northern South America (Lohmann & Taylor, 2014). It belongs
to the monophyletic tribe Bignonieae, which is predominantly composed of
lianas that climb using terminal leaflet-modified tendrils. Bignonieae
is the most diverse and abundant clade of lianas in neotropical lowland
forests (Gentry, 1986). A synapomorphy of the tribe is the presence of
four or multiples of four, equidistant phloem wedges formed by variant
regions of the cambium, which are located more internally in the stem
due to its reduced xylem production (Lohmann & Taylor, 2014; Paceet al. , 2015; Fig. 1c).