Ansellia habitat temperatures

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Yes. How much sun or shade were they getting?

Until recently I figured I could grow almost no orchids outside here during the summer, even in full shade. But now I'm wondering. Eulophia petersii is bulletproof even in a half day's sun. It has a huge natural range, and so does Ansellia. I wonder whether they overlap? Growers in Tucson, only slightly cooler than Phoenix, manage lots of Eulophias and Oeceoclades outside under shade cloth during the summer.

We have almost no wind to contend with, except during the monsoon when humidity is around 40%. During our very hottest times of year humidity is under 10% and evaporative cooling is very effective.

Hot summer nights is another issue. Many obligate CAM photosynthesis plants can't handle those. Tillandsias can't take it. Echeverias can't take it. I know at least some orchids are CAM plants.