The genus was traditionally included in the
borage family,
Boraginaceae sensu lato. It was assigned to the subfamily
Ehretioideae, but molecular data revealed it to be more closely related to the genus
Cordia, so that other authors placed in
Cordioideae. Subsequently, it was placed in its own family, Coldeniaceae, within the Boraginales
order, by the Boraginales Working Group. , this placement is accepted by
World Flora Online, ==References==