The "seed bank," which is seen by Horticulture Department researchers as "top secret," is similar to any other greenhouse except that it has two locks on the door. Inside are collected 29 natural varieties of moth orchids (there are a total of 45 natural varieties worldwide, with two native to Taiwan), as well as 837 improved strains.
被園藝系研究人員視為業務機密的「種源庫」，和一般溫室並無不同，只是門外多了兩道鎖，裡面收集了廿九種蝴蝶蘭原生種（全世界共有四十五種原生種、台灣有兩種），和八百卅七個優良品系。