"DNA data has consistently shown that P. restrepioides, type species of Elongatia, and its closest relatives belong in Pleurothallis rather than Stelis (Karremans et al. 2013; Wilson et al. 2013, Pérez- Escobar et al. 2017). The flowers of Elongatia are superficially similar to the members of Stelis sect. Carpinterae and Stelis sect. Petiolatae. From the first they are distinguished by very large plants, with thick coriaceous leaves, from the second by the large plants with sessile leaves. From both, Elongatia species are distinguished by the erect, elongate inflorescence with multiple simultaneous flowers." (Karremans, 2019).