Dendrobium speciosum is one of the world's most underrated and exciting of orchids. They are capable of producing possibly the largest display plants and most spectacular shows of mass blooming of any known orchid. Extraordinarily tough, hardy and drought tolerant it should be one of the most cultivated plants ever! It can tolerate near frost to temperatures over 45°c without severe damage.
This orchid is native to a vast section of Australia ranging from Mallacoota (37°33'S) in South-East Victoria to the tropical conditions up past Cairns (16°57′S). Because it is found over such a vast region, botanists have broken the species apart into many subspecies or varieties. It seems every few years they change names again, so we will mainly use the oldest and most accepted names in this guide.
https://upload.wikimedia.org/wikipedia/commons/3/30/Rock_Orchid_-Thelychiton_speciosus%287977925423%29.jpg
