Date de publication : Sp. Pl., 2:
1192. 1753 [01/05/1753, fide TL-2,
4769]. Voir aussi L., Gen. Pl., ed. 5
74. 1754 [08/1754, fide TL-2,
4778].
Taxonomie : Dans sa conception traditionnelle, genre paraphylétique comprenant deux lignées qui devront être traitées comme des genres distincts (à défaut d'inclure
Rosenbergiodendron Fagerl. 1948,
Sphinctanthus Benth. 1841,
Tocoyena Aubl. 1775 et
Casasia A.Rich. 1850 dans un genre
Randia L. 1753 considérablement élargi!). D'après Borges
et al. (
2021): "Finally, the non-monophyly of
Randia, clearly demonstrated in our results and indicated (but unsupported) in previous work with adequate sampling (Gustafsson & Persson 2002), calls for a taxonomic revision. One solution could be to employ a broader delimitation of
Randia that includes all members of the Neotropical clade. This choice would, however, render
Randia highly heterogeneous in morphology. Another option is to restrict
Randia to only include (all) the members of the clade that contains the type species (
Casasia calophylla and
Randia aculeata), i.e. the
Randia-
Casasia clade (
Randia L. has taxonomic priority over
Casasia A.Rich.). The species of the
Randia armata subclade would then need a new generic name. We find this scenario the better choice because the generic status of
Rosenbergiodendron,
Sphinctanthus, and
Tocoyena could then be maintained. In addition, it renders
Randia sensu stricto (= the
Randia-
Casasia subclade, fig. 1) as well as the new genus (= the
Randia armata subclade, fig. 1) monophyletic and more morphologically and geographically homogeneous compared to a broadly circumscribed
Randia. Gustafsson & Borges
et al., Phylogeny of the
Randia clade Persson (2002: 672) discussed the matter and stated that “no historical names of this group of species are available for revival”. However, one possibility worth exploring could be to resurrect the genus
Basanacantha Hook.f. (Hooker 1873), although additional research is needed. For example, none of the originally described species of
Basanacantha (i.e.
B. dioica (H.Karst.) Hook.f.,
B. hebecarpa (Benth.) Hook.f., and
B. monantha (Benth.) Hook.f.; Hooker 1873: 82–83) has been sequenced or otherwise investigated for phylogenetic purposes. For now, we continue to maintain Fagerlind’s (1943) circumscription of
Randia, pending further studies.".
Il est probable que toutes les espèces des Guyanes appartiennent en réalité au genre
Basanacantha Hook.f. 1873!