A. barbatum Alliance (5 species) Species presenting ovate and obscurely tetragoned monofoliate pseudobulbs; flowers presenting elliptical petals. A. barbatum A. ciliatum A. fuscopetalum A. micropogon A. herzogii

A. macropetalum Alliance (4 species) Species usually presenting ovate and obscurely tetragoned monofoliate pseudobulbs; only one species presenting fusiform bifoliate pseudobulbs; flowers presenting large rounded petals. A. chrysopteranthum A. chrysopterum A. macropetalum A. culuenense

A. longipes Alliance (1 complex; 3 species) Species presenting fusiform pseudobulbs arranged on scandent rhizome and always short few flowered raceme (1 to 5 flowers); flower's lip presenting large triangular isthmus.                                                                                                                 Alatiglossum longipes Complex A. longipes A. uniflorum Other species in A. longipes Alliance A. regentii

A. croesus Alliance (2 species) Species presenting fusiform pseudobulbs arranged on cespitous rhizome; always short few flowered raceme (3 to 8 flowers); flower's lip presenting a very short isthmus (only a strangulation or waist that give access to intermediate lobe).                                                                                                        A. bohnkianum A. croesus

A. cogniauxianum Alliance (1 species) Species presenting flower's lip with panduriform intermediate lobe. A. cogniauxianum

Unclear species (1 species) A. reductum