"Suddenly I cherish my purpuratum more!"
Well, they're not coming out of the wild any more! In fact, I believe that they may be extinct in the wild due mainly to habitat destruction as Hong Kong's growth has exploded over the last couple decades. At least, it's what I've heard. I don't know this for sure; but, I wouldn't doubt it. It seems all too often throughout the world that our cherished plants are important until someone wants to build a parking lot, put up a new building, or build a bunch of new homes. New tax revenue sources tend to trump all else!