Dipodium scandens is an orchid species that is native to Malesia

From Wikipedia-  Dipodium scandens is an orchid species that is native to Malesia.
Common Name The Scandent dipodium.

Yet to ensure if Den pandanum is synonym to this species. 

One of the rare orchids of Peninsular Malaysia and of Mount Kinabalu, scandens is an epiphyte with elongated stem completely enveloped by leaf-bearing sheaths. This plant can grow up to three meters and looks very much like pandanus plant. 

Branching is dichotomous (repeated branching into two equal parts) or trichotomous or irregular. Leaves are sword like and arranged spirally. In fully exposed leaves, the midrib is bent, and the upper third or so of the leaf hangs down giving a drooping appearance.  

Produce about two to three flower stems at the same time with about a dozen flowers per stem. Blooms like three to four times a year. 

-jungle orchid nusantara images

Dipodium scandens- 2 stems (about 10 inches long) selling @ us 45, inclusive of express courier service. Please email me for further details.

 flower  below from orchidspecies image with thanks