Euplusia,
I realize this is an old post but can you expand on the culture you give rosea and Rebecca Northern? I hear they are difficult to grow.

I don't think you'll have any problems growing Clowesia rosea. They're not difficult to grow at all if you know how to grow Clowesia, Catasetum, Galeandra, Mormodes, or Cycnoches. The care is very similar to each other.

Just don't water during their dormancy. They are winter dormant. Stop watering around late Oct/early Nov.

Intermediate to warm.

Indirect moderate sun.

They like a good amount of moisture when growing, but not sopping wet. Allow them to dry out between waterings.

Moderate humidity is fine.

Flowers are on a pendulous inflorescence.