Dendrobium bracteosum (white)
 

These bloom from mid to late summer, for about 4 months. New canes grow, mature, drop old leaves. Flowers bloom from old bare canes.

This is the white version of the species. There is also a pink version. They are not different species.

Wow, that's a great den.

WOW! superb! love the white with the deep orange centre! A definte 'must get'.. one day!