Have :

Cymb aliofolium

Cymb simulans

Cymb pendulum

According to Jay Phal's internet orchid species the above three are the same. I have only seen the flower of aliofolium so I don't know if the others are different. I got them as separate distinct plants.

Cymb bicolor

Bicolor has an adult bulb with leaves and roots, all the others have the same plus an initiating new growth. All are listed as warm growers but have thrived outside in SOCAL.

Nick