But in 2002, when propagation was tried through cuttings, because the genetic material of the plants was so similar, the process did not yield viable seeds. Eventually a few further surviving colonies of wild plants were discovered in a military camp at Chingshui, providing additional native genetic material for propagation.
但 2002 年以扦插方式大量繁殖時，卻因遺傳同質性高，無法形成有效種子，最後在清水營區內發現少量被保留的族群，才有原生種原可供繁殖。