| Regno | Plantae |
| Sottoregno | Tracheobionta |
| Superdivisione | Spermatophyta |
| Divisione | Magnoliophyta |
| Classe | Magnoliopsida |
| Ordine | Gentianales |
An order of eudicots that includes Apocynaceae (adenium, hoya, plumeria, oleander) and Rubiaceae (coffee). Many species produce latex or alkaloids, and the Apocynaceae include popular succulents and climbers.