I’m glad to find out that a jade vine specimen is still grown in one conservatory in Canada. I recall reading this article by Art Drysdale that seemed to suggest it’d be difficult to find another vine (in a public institution) after the one at Allan Gardens Conservatory was lost.
Strongylodon macrobotrys is considered one of the “vanishing treasures of the Phillippine rain forest (see: jade vine). Its decline is due to the deforestation of the dipterocarp old growth forest for timber (Dipterocarpaceae). Despite the loss of its native habitat, jade vine is widely cultivated in other tropical areas so it is not considered threatened by the scientists behind the International Legume Database & Information Service (ILDIS).
The cyan or jade colour of the flowers is fairly rare in the plant world. One of the clever folks on Flickr, Morabeza79, has taken a photograph of both Strongylodon macrobotrys & Ecbolium viride in his Hawaiian garden and accompanied the photograph with links to a few of the other cyan-flowered plants.