C. guttata is one of 120 or so species of Cynorkis. In their 2007 description in the Orchid Review, Johan Hermans and Phillip Cribb note that it is fairly common (not a huge surprise) in the highlands of Madagascar. And they report seeing plants in degraded habitats on rocky outcrops at 1800 meters elevation.
If you have mastered growing Habenaria rhodocheila and H. medusa, this plant will be easy. The underground tubers simply need a dry rest after the foliage withers. 'Dry rest' means less frequent watering, not complete cessation. We let ours become almost bone dry, then we water it. The appearance of the new shoot is our signal to increase the watering frequency.