The colony of H. debilis subsp. cucumerifolius was first observed in Taiwan in 1999.During our field survey in 2007 we witnessed the significant range expansion though the coast of Changhua County.

• 作者等于1999年即已发现当地大量之瓜叶向日葵族群，目前再进行调查发现其分布范围已有显著扩张。