What is "margelliantha"

Margelliantha is a genus of flowering plants from the orchid family, Orchidaceae. It consists of 6 known species, all native to eastern and southern Africa.

1. Margelliantha burttii (Summerh.) P.J.Cribb - Zaire, Rwanda
2. Margelliantha caffra (Bolus) P.J.Cribb & J.Stewart - South Africa
3. Margelliantha clavata P.J.Cribb - Tanzania
4. Margelliantha globularis P.J.Cribb - Tanzania
5. Margelliantha lebelii Eb.Fisch. & Killmann - Rwanda
6. Margelliantha leedalii P.J.Cribb - Tanzania, Kenya