In seed plants, the procambium and cambium generates a cylinder of wood surrounded by a sheath of secondary phloem. However, independently, in numerous lineages, this conserved developmental pathway was altered to generate “vascular variants” i.e., a dramatic alternation to the location and distribution of xylem and phloem in stems.  Paullinieae (Sapindaceae), a tribe of 6 genera of woody vines (lianas), contains the most diversity of vascular variants across plants. Although the evolution of vascular variants has been investigated in the large genus Paullinia, little is known about diversity housed in the small genus Urvillea (~18 species). This group stands out by having a diversity of growth forms including woody climbers (lianas) and even hemicryptophyte/rhizomatous species. In this talk, we focus on the evolution of development of stem ontogenies in Urvillea, investigated by using the first molecular phylogeny of the group, coupled with classical developmental anatomy, and Laser Ablation Tomography (LAT). We found that Urvillea have five stem developmental pathways: (1) regular ontogeny and (2) four variant ontogenies, which include (a) phloem wedges, (b) fissured stems, (c) lobed stems, and (d) successive cambia. We mapped these five ontogenies (regular and variants) in our molecular phylogeny and found that regular stem is ancestrally reconstructed in the genus. Lobed stems evolved in deep nodes, prior to the diversification of the three main clades of the genus. Phloem wedges and fissured stems evolved from lobed stems each once within the same clade. There is one reversal to regular stem in a second clade, which led to the evolution of successive cambia. A third clade comprises only lobed stems. Our findings illustrate that (1) there is an enormous developmental plasticity in vascular development in Urvillea and (2) vascular variants in the genus are developmentally similar to those found in closely related lineages, therefore, suggesting evidence towards repeated evolution of complex anatomies within Paullinieae lianas.