Maxillaria porrecta 
Maxillaria pseudoreichenheimiana 
Maxillaria rauhii 
Maxillaria rufescens 
Maxillaria speciosa 
Maxillaria spilotantha 
Maxillaria tenebrifolia 
Mayfly orchid 
Mediocalcar decoratum 
Medusa orchid 
Microtis unifolia 
Midget greenhood 
Military orchid 
Milky orchid 
Miltoniopsis bismarkii 
Miltoniopsis Jean Carlson 
Monk Orchid 
Monkey orchid 
Monkey-like Dracula 
Moth orquid 
Mountain Bird-orchid 
Mountain caladenia 
Mountain ladys slipper 
Mouse-Like Cyrtochilum