Taxonomie : Les analyses moléculaires de Tripp
et al.
(
2023) indiquent que
Ruellia geminiflora
Kunth 1818, telle qu'actuellement conçue, est polyphylétique: "There has been ample taxonomic confusion surrounding
Ruellia geminiflora and its close relatives. As evident from phylogenetic results presented herein, this species is resolved as non-monophyletic, with numerous other entities occurring among accessions of the species including but not limited to:
R. bahiensis,
R. beyrichiana,
R. blanchetiana,
R. brachysiphon, and
R. hookeriana. Among these, names such as
R. blanchetiana and
R. beyrichiana have been treated as synonyms of
R. geminiflora (Brazil Flora, 2014), but based on our phylogenetic results, we retain them as distinct for the time being and pending further study. Alternatively and/or additionally, given prior identification issues regarding plants in this group, misidentifications may be contributing to phylogenetic complexity. See Plants of the World Online (POWO, 2022) for a compilation of some 22 names that have been treated as synonyms of
R. geminiflora."
Taxonomie : En Guyane française, une petite population d'écologie singulière ("sous-bois" de forêt sur rochers littoraux, Bourda, Cayenne) ne produit que des fleurs
cléistogames (voir www.inaturalist.org, observations n°
142915980,
197314327 &
212504679). D'après Tripp
et al. (
2023): "Many species in
R. sect.
Gymnacanthus (e.g.,
R. donnellsmithii, R. geminiflora, R. hookeriana, and
R. spectabilis) produce cleistogamous flowers in addition to open, chasmogamous flowers".
