Dendrobium Sw.

Pseudobulbs elongate, jointed (Fig. 44). Labellum 3-lobed Dendrobium
Leaves long, terete succulent circular in cross section or ± flattened. Flowers not resupinate (i.e. labellum uppermost in flower)
Leaves not terete thin to leathery, conduplicate, Stems swollen for at least part of their length. Flowers usually resupinate ie labellum lower most in flower